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How far can people really get with an IP address?

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A frequent question I get on Ask Leo! relates to IP addresses, and how much you can find out from one.

"Publicly available information about an IP address can typically only be traced as far as the ISP that owns it."

It get this from both sides. On one hand, I hear from people who are concerned that someone can track them down physically - perhaps find out their home address - based on their IP address. On the other hand, I also hear from people who want to find out who's at some IP address, because they're being contacted in some form, and that's the only bit of potentially identifying information they have to grab on to.

Publicly available information about an IP address can typically only be traced as far as the ISP that owns it. If the IP happens to correspond to a registered domain name, then perhaps the domain registration might provide a little more information - or not.

It's the ISP that assigns the IP address to an individual device on the internet. And a good ISP will not reveal to whom they've allocated the address to just anyone. In fact, my assumption is that legal action and possibly law enforcement of some sort would be required for an ISP to release that information.

In many cases, the information is even more obscure. Instant Messaging conversations typically do not include the IP address of the participants. If, for example, you're attempting to track down who is IM'ing you, you'll probably need the help of the IM provider such as AOL, MSN, or one of the others. Same for most web-based email providers and messages - not all contain the IP address of the actual originator, so you'll need the provider's help to track it down. Again, that's not help I'd expect to get without legal action.

In reality, I consider that great news. While it's important that that information be made available when it's appropriate, meaning legal action, I think we all want our privacy too. The ISPs and service providers are important gatekeepers of that privacy.

So don't go expecting to find a lot of information based on an IP address unless you've got a valid and defensible reason. And conversely, while technically it is possible to track down an IP address to a specific machine and location, it's not easy, and it's not something that the general public can do.

Have a comment? Visit askleo.info, and enter 9501 in the go to article number box. Let me know what you think, I'd love to hear from you.

This is a presentation of askleo.info, a free on-line technical question and answer service. Hundreds of questions and answers are online and ready to help solve your computer problems. New questions and answers are added daily.

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Article C2482 - December 7, 2005 « »

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Leo Leo A. Notenboom has been playing with computers since he was required to take a programming class in 1976. An 18 year career as a programmer at Microsoft soon followed. After "retiring" in 2001, Leo started Ask Leo! in 2003 as a place for answers to common computer and technical questions. More about Leo.

Not what you needed?

70 Comments
Bill Matherly
December 8, 2005 10:39 PM

While your synopsis of tracing an IP address is correct; I would simply like to point out some things that were not addressed in either your article or podcast.

While the general public may not have the knowledge or desire to hunt down individual ip addresses; it's not very difficult for someone like myself to utilize a degree of social engineering which doesn't require technical knowledge of a computer or even how networks operate.

I would just like to state that worries can be eliminated by simply utilizing what are known as proxy servers that will mask the originating IP address so that there is zero opportunity for anyone to be able to pin point an actual geographical location. Of course I am sure you know the routine, I was just shocked that it wasn't mentioned and a preventive measure.

Leo
December 8, 2005 10:42 PM

Good points all. There's only so much room for me in a 3 minute podcast :-).

Wayne
December 12, 2005 9:19 PM

I just received a message stating that someone with I.P. address 149.225.126.87 has tried three times to access my pay pal account. I googled the I.P. and it gave me a persons name, address, and e-mail. Then all the messages that he has written. It shows up from Romania? But the address is on the East Coast?

Leo
December 15, 2005 9:51 PM

Those are the result of viruses and spyware. You can, and should, safely ignore it.

Snoopy
December 24, 2005 11:57 PM

proxy servers that will mask the originating IP address so that there is zero opportunity for anyone to be able to pin point an actual geographical location.

Is that tru that taher is zero chance to get location?!?

Leo
December 25, 2005 7:26 PM

I wouldn't call it zero. The owner of the proxy server could be tracing or logging where things come from and go to. You're kinda trusting that they won't reveal that information.

Amanda
January 7, 2006 2:47 PM

i am part of a pregnancy forum and i have made many friends there but there are some people coming on and taking our pics and our baby pics and photoshopping them to look horrible and they are some how getting our personal info like home addresses and phone numbers we think it may be someone that was or is part or the forum but no one will admit it is there anyway to get thier ip address so that we can figure out if it is someone that we know that way we dont give them anymore personal info

Leo
January 7, 2006 9:08 PM

The forum software could certainly have it, but it will take the forum administrator, or perhaps even the server administrator to retrieve it.

But I will warn you that the IP address may not get you very far even if you do get it. See this article: http://ask-leo.com/can_i_get_someones_name_and_address_from_their_ip_address.html

Lisa
January 15, 2006 7:14 AM

I have a problem with someone harassing my daughter online with AIM. How do i find out who it is and report it to the police. The person has made threatning remarks.

Leo A. Notenboom
January 15, 2006 11:26 AM

Report the situation to AOL.

sudhakar c
January 30, 2006 1:14 PM

sir, you can try at http://arul.telenet-systems.com/track.html

works for me all the time ,

Elvis
February 4, 2006 8:13 PM

I'm part of an internet forum where a moderator got in a small fight with a user and the mod went and did an IP trace and from that info, he posted the user's state in the public thread. Is this legal?

Leo
February 5, 2006 8:20 AM

Am am not a lawyer. That being said, I can't see why it would be illegal.

JG
February 5, 2006 9:30 AM

Today I got an email from PayPal (eBAY) that someone with the IP adress 149.225.126.87 tried to access my account. Then it asked to verify my account when I signed in, asking for information down to my ATM number. Obviously, PayPal had no interest in that number since it is not used in transactions. The PayPal inquiry was undoubtedly a fake. Do not respond to PayPal or any credit card company through the email itself, but go to the source and reinforce your security up to and including cancelling your account or credit card.

UGH
February 7, 2006 9:55 PM

Someone used spyware to check my IP address. They claimed all they needed was the screename I was using in the forum we were in. I know exactly who the person is and what country they live in. The person was actually bragging about doing this. In the process they totally ruined my computer. I'm pretty sure it has a few dozen viruses by now. The night it happened I ran Ad-Aware, and over 300 things were on the report, so I know it was from this person and their little spyware crap.

Is there any way to get them in trouble for this? For using spyware and wrecking my puter? Or atleast using the spyware on them to show them how it feels?

Hollie
February 16, 2006 6:02 AM

I also got 4 of the same messages from paypal Someone with ip address 149.225.126.87 tried to access your personal account! I canceled my account ,

liatto
February 16, 2006 1:02 PM

Many cyberstalkers are caught because they don't use anonymous proxy but when they remain anonymous , (Several methods to do it) with anonymous proxies , chain of proxies , anonymous proxy with a firewall , they restrict all conections except for the anonymous proxy (one of the safest method to stay anonymous) , if they are with a LAN behind a wingate (one of the safest method) , if they hack pc computers from other countries (the safest nš1 method) , they use a chain of them and use it for cyberstalking... its very hard to track them and police don't waste time to make an investigation :(


Unfortunately now some cyberstalkers are not "stupids" and they use several methods to stay anonymous. Many cyberstalkers visits many hack webs pages to learn how to stay anonymous.

So definitely:

If a cyberstalker not use proxy: possible to track him

If a cyberstalker use anonymous proxy: difficult to track him.

If a cyberstalker use a chain of 2 or 3 anonymous proxy: 99% difficult to track him

If a cyberstalker use anonymous proxy with a firewall installed: 99% difficult to track him

If a cyberstalker use a LAN behind wingate: 99% difficult to track him

If a cyberstalker use remotes pc computers from differents countries : 99.99% difficult to track him

if a cyberstalker from other country without proxy is posible to track him but no punish.

if a cyberstalker from other country with a proxy:99% difficult to track him.

Unless if you have a lot of money , if u are poor as i , you cant do anything when they use those methods :(.

A friend of mine who has a web page , it was hacked 4 times during 2004 , so he call to his ISP proxy , No response , they call police , they said that is the hacker located out from my country they can tell it to interpol but they only waste time in bigger crimes such as pedophilia , frauds...
Interpol dont waste time in crimes such as cyberstalking :(.


Maybe 1% of cyberstalkers who use anonymous methods to stay anonymous are caugth , 99% are free.

Greetings

hon
February 27, 2006 8:21 AM

Hello
Can I identify a persons ip address and view every or some of the websites they have visited?
I would be very pleased if you could answer my question it's very important.

anoyomous
March 16, 2006 11:05 AM

Hi I was wondering if I text messaged someone through yahoo messenger will they be able to find out where I live? Thank you

Emersonian
March 26, 2006 9:34 PM

Leo,

Go here:
http://www.geobytes.com/IpLocator.htm?GetLocation

Without doing a thing you will see your IP, a physical map and everything down to longitude and latitude. Any IP can be entered. That is SCARY!

Leo
March 26, 2006 9:42 PM

Not scary at all, because as I've been saying ALL ALONG it shows the location of the ISP, NOT YOU.

Verified myself - I have a static IP that resolves to the DSL line to my house - and yet, the site is WAY WAY off. Didn't even get the city right.

Again, you CAN NOT identify the physical location of an IP address without the help of the ISP.

Emersonian
March 26, 2006 10:54 PM

Leo,

It shows a map. It shows a dot on that map that is exactly where my residence is. It shows my exact latitude and longitude which they calculate to be with 99% accuracy (some come up with less accuracy).

No, it's not my actual physical address, but it shows city and area, and with the ability to determine longitude and latitude (say a GPS system), it's within feet! Why don't you get this? Why do you want people to feel safe when they are not?

E.g., say a woman is hiding from an abuser who thinks she's moved to Montana but she's actually still in New York or wherever, her IP address will reveal all.

Emersonian
March 26, 2006 10:56 PM

Addition to above ... It appears that you did not go to the link given in first email. Because your reply ignores all the facts of an actual visit to the site.

Leo
March 26, 2006 11:14 PM

I did in fact use the link you provided, and the locator on the map and the lat/long was nowhere near my home. IT WAS WRONG - in a very predictable way. (My IP shows at my ISP's node in Redmond WA. While that's quite expected, that's not where I live.)

Knowing how IP addressing and internet providers work, my statement stands.

General area? Sure. But what I'm talking about is accurate location - something that would allow someone to physically find you or your home. An IP address cannot do that without the help of the ISP.

Emersonian
March 27, 2006 8:51 PM

You are no longer relating to the facts, but rather intransigently defending an erroneous position. Try the IP addresses of 20 different people from around the country and around the world at that site (note the stated percentage of accuracy for each), to see how it works. Beyond that I give up, because facts and reason are not getting through.

An example to help you "get" this: E.g., if a woman is running from an abuser, and the stalker is able to obtain the IP address he is now in the neighborhood. Do I have to explain this any further? Do you give a hoot? It does not appear that you do. You are stubbornly stuck in a denial of danger that does a disservice to your readers.

Victoria
April 12, 2006 7:55 PM

I can see the point of an abusive women who may not want someone to even know the city that they are located. But is it not also reasonable that this can be used to someone's advantage by having a friend or even a service send e-mails from another city for these women, maybe people who are really concerned could come up with an idea for free for these women and forward e-mails on their behave to confuse or throw these people off by using IP addresses that are not within their actual city.
Maybe ISP's can have special IP addresses assigned to them that would not be connected to any city but just by country or something for people who have a legal right to hide their location, such as abused women's shelters or other such agencies.

jamie
April 15, 2006 5:57 PM

Hello,
Is it possible for one computer to have more than one ip address?

Leo
April 15, 2006 6:18 PM

Yes. IP addresses are actually assigned to network cards, so if you have more than one network card, you can have more than one IP address. There are probably other approaches as well.

Matt
April 16, 2006 10:21 PM

Emersonian....I doubt you have researched the way that you suggested Leo did because he's right. My location on the map is NO WHERE NEAR where I live, not even in the same city, nor a nearby one PERIOD. So I did what you suggested and ran 5 different IP's of people that I know and know where they live. ALL OFF by more than 20 miles each.

Geocities has the same program and while it's fun to know the general area, it is in no way anywhere near ANY of the IP's I checked out and YES I went down to the street level. So calm down and worry not.

bkls
April 24, 2006 11:50 PM

by using a program called neotrace, i am able to get a reletive distance from a set point. I am currently attempting to trace the address of a person who is scamming my company by selling merchandise under the table. I basically can take a set point (in this case the lat long combo of 32.783N, 96.800W , which is dallas city center. the program uses pinging to acquire a reletive distance, and while not stating this distance or the EXACT direction, it does give a line in a reletive direction (for example, a line 1 inch long at max zoom from the point in a SW direction). i can then use the map to find the distance to another known point, say it be my house. i compare the 2 lines to find a scale for the map, be nice if it was included but meh w/e... i can then apply trig and geometry to find a general circle that the location lies upon. i know what you are thinking, its not the person, simply the ISP, this is NOT true, for i have 2 people that we are "looking into" both with the same ISP using different ports, on different ip addresses. the location is the same on each trace up until the last, where it goes from ISP to location. the end location is different per person, and shows up accurately for my own, even tho my ISP is in forney, not dallas, nearly 50 miles away. I can then take this circle, apply to a map, and note any houses in lets say a 1 mile distance from any point on the reletive circle in about the right direction... apply known addresses of employees, and it has been narrowed down, possibly pinpointed. theft stopped. it is possible to do this, and i am working on the math at the current time. difficult, YES, impossible, no... i have been working near 6 hours on this, and am finally getting to the point where i can apply the map and find houses that match the general location of the perpetrator (who has intelligently changed his IP address). easy from here out...

btw, for all of you wanting to change your ip address, follow the following.

1. go to run
2. type "command"
3. in the DOS prompt, type ipconfig /renew
4. type exit to return to windows.

takes no more than 30 seconds, problem solved for anybody wanting to get away from a stalker... gg dawg gg.

bkls
April 25, 2006 9:17 AM

caught the person using IP, he confessed to it and has been released from the company. Just proof that it IS possible to pinpoint things through with IP addresses, just really freakin difficult. Took me nearly 8 hours last night to figure out the math, especially when i came to what exact angle the line went in, had to use other known points to figure it out using trig... ug pain, anyways, it IS possible, just difficult.

rapster
May 10, 2006 10:33 AM

well cool i tried it but my dos says bad command, can get away with that
thanks for hooking with g-mail u r a star

rapster
May 10, 2006 10:40 AM

thamkx body but my dos says bad command or fuile name

antoine
May 13, 2006 3:04 AM

AT Bkls: i have try to change my IP as you show above but it not work ?It will chang automatiquely or I have to type any thing to change it ?

Tix
May 28, 2006 11:14 AM

There was this one time where ppl were 'hacking' onto my comp. Lol, I traced them all, one guy was in Australia! Lol.

important
June 5, 2006 2:44 AM

what about services like abika, that if you pay a certain amount, offer to track down the exact location of an ip address for you? can people abuse that and does it actually work?

cysserojr
June 19, 2006 10:33 PM

so if u wanted to block somone from reading ur IP like maybe useing zonealarm to block one from reaidng it say u have more then 1 acc. used to cheat on a site and they can tell hpw many acc u have by ur IP if they cant get ur IP then they cant tell pls help

shahzad
July 9, 2006 11:55 PM

i would like to only know that how can we trace the persons if we have a ip address of tham.
is there is any software to do that ,and if not than please tell me guys that how can i trace him and exploit him by ip address.please please

james
July 22, 2006 8:32 AM

i was recently playing a game of warcraft, and the host of the server, found my IP adress, my internet provider as well. At the end of the game he quoote, "NO MORE INTERNET FOR YOU!" so i was thinking, is this really possilbe , if someone was to obtained my IP adress and they were to cancel my dsl account?

liam
August 7, 2006 1:35 PM

i was on a game and they bansihed me for no reason and when i try 2log back on the game it says ip banshed so is there any way i can change my ip so i cna go back on the game and the 1 at the top didnt work for me

Molly
September 15, 2006 7:55 PM

Hi I was wondering if you can tell me something.... can I be blocked from someones web site if they have my ip? and how do they get it? and how much damage can they do with it? can I change it so I can go back on to their site and say HAHAHAHAHAHA... ? thank you

sunny
September 17, 2006 2:48 AM

Sir how can i get someones IP?for hacking perpose
tell me guide me plz

Phil
September 27, 2006 2:13 AM

Sir, I've read your article, it's kindda enlight me for that matter. Thank you. More Power.

Richard Mathewson
November 1, 2006 4:10 PM

Sir,
I am a private investigator and am currently working on a case involving identity theft. Someone at my client's workplace obtained her flash drive with her personal information and created a MySpace profile defaming her on that site. I need the IP from this individual's computer in order for the authorities to get involved. What would be the best way to go about getting that IP? My agency is Watchdog Investigations LLC. AZ Lic#1557059.
-Richard Mathewson

Leo A. Notenboom
November 1, 2006 4:32 PM

I believe it probably needs to be the other way around: I think you'll need the authorities to be involved before MySpace will give you the IP. Ultimately MySpace would be the place to get the information. Not being a lawyer, I can't speculate on what the requirements for that disclosure would actually be.

Dicky
January 5, 2007 5:00 PM

Richard Mathewson you have a lot of time on your hands....Can I get a pizza?

conspiracynut
January 22, 2007 10:34 AM

what does it mean if an ip address cannot be traced?

kristin
March 10, 2007 3:09 PM

Hi:
I would like to know if someone can know your physical computer name while chating on gmail? I was chatting with a guy who identified my computer name which took me by surprise. So does that mean he hacked into my computer? And if he could tell the computer name, what other information could he have acquired? Could he have hacked in my gmail as well? This guys physical location was out of US somewhere in asia. Please kindly explain me all this. I would greatly appreciate your help.

Sincerely, kritins

Leo Notenboom
March 10, 2007 3:20 PM

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Depending on what email program you use, and probably a few other
things, your machine name may be included in email headers on the email
you send. Doing so is totally benign, and does not indicate a hack.

However, if you are not up to date with latest patches, if you are not
behind a firewall, and if you have other settings set improperly, of
course this same information could be the result of a hack. Make sure
you're configured properly for security. In this scenario being behind a
firewall is probably the most important.

This is also well worth reading:
http://ask-leo.com/internet_safety_how_do_i_keep_my_computer_safe_on_the_internet.html

Leo
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Miranda
March 11, 2007 8:20 PM

Is it possible to track someone with just their IP address, and not have access to their computer? I was just informed that someone is aware of my online activity (nothing illegal, but certainly embarassing for some) but I have no idea how this information could have been obtained. This person has no idea where I live, much less have access to my computer. I thought maybe if they know what my IP address is, they could search to see what websites and such I have visited thru that IP address. Possible??

Rick
March 17, 2007 1:42 PM

Leo,

In some cases, ISP's tend to be a bit sloppy when assigning dynamic customer IP's. I have, on occasion, pinpointed someone's location within 4 or 5 city blocks... simply because the second last octet of their IP was "53" (for example)... and I've known that 53.x IP's serviced no other neighbourhood but.

You can also gain much greater accuracy, by going back through the hops, and looking up the location of whatever that particular user is connected to.

Now let's just say for example, that you've already determined that the user of that IP is a DSL-subscriber (easy thing to determine)... and you've pinpointed the exact location of their C/O... it's often a very safe bet, that the machine you are tracing, is located within 3.7 line-miles of that position.

It still may not put you on that person's doorstep, but it is indeed, a bit too close for comfort. With information as such, you may also be able to determine where that person is most likely to shop, go to school, buy their gas... etc.

Now, I'm not saying that it's always going to be so 'cut and dry' easy... but there are cases when IP tracing can get EXTREMELY close to home.

What else might the tracer know about you, that can help snap together the remainder of the puzzle? What information might your neighbours give up innocently, if the tracer casually walked down your street posing as an old friend?

It's indeed something to think about.

Those serviced by long-range wireless or satellite connections are probably about the safest surfers on the net (as far as IP tracing is concerned).

SirStan
March 20, 2007 7:53 AM

so tell me how can i stop a website from getting my ip when i log onto the site there must be some kinda scrambler or something ?

Leo A. Notenboom
March 20, 2007 12:57 PM

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You'd use an anonymization service.
http://ask-leo.com/is_anonymous_web_surfing_possible_if_so_cant_the_bad_guys_use_it_too.html

Leo
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Lucian
March 21, 2007 11:27 AM

It's fun or usefull when you track IP addresses, because you can make an idea about the person, country, maybe state, or if it is from an organization or big company. http://www.ipgp.net gives accurate information and map.

bindaasjhokra
April 8, 2007 9:27 AM

how anyone can know the ip address of the other person he is chatting with over the yahoo messenger or on mail id? pls tell me this is highly required information.

joe murray
June 27, 2007 8:48 AM

Recently my company emails were hacked into and a false and nasty message was sent to most of our clients. I have the IP from the email and want to trace it . I'm virtually certain we know who the offender is . How do i it ?

curiousminds
July 1, 2007 10:20 AM

how long does the IP provider keep information?

Leo A. Notenboom
July 1, 2007 10:04 PM

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No way to know. It depends on the ISP.

Leo


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Curious
July 13, 2007 10:14 AM

WHile it is possible to find an approximate location from an IP address in an email header, email originating from AOL accounts only seems to trace back as far as the AOL server.

Is there a way to find an approximate location of the specific computer used to send the mail?

Leo A. Notenboom
July 13, 2007 2:07 PM

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As stated in this and several articles on this site:

- - if you're an average user: no
- - if you're the ISP that owns the IP address: probably

So normal people typically need to get law enforcement involved and court
orders to trace an IP to a computer.

Leo


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mohit
July 20, 2007 9:33 AM

how could i know the ip address of the person ,whom i am chating in yahoo messanger pliz tell me i need this information

Leo A. Notenboom
August 21, 2007 1:39 PM

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I'm closing comments on this article.

Please read
http://ask-leo.com/how_do_i_find_out_whos_at_a_particular_ip_address.html for
information on tracing IP addresses, and what it takes to do so.

Leo


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Ryan Pogue
October 3, 2009 11:56 AM

What does law enforcement typically need in order to get a court order to provide the ISP provider? I have a handful of gmail accounts (blocked of course through Google without a court order) that were intentionally created to slander and defame me and my wife... I know it is a specific person, I know, through our ISp provider that it occured in the "general vicinity" of the offender, but I have not the proof to show it is this person - otherwise he would sign his name, right? I want to provide law enforcement with enough information to "suspect" or "assume" or more of a "coincidence" to get that court order to seize this person's computer to verify the gmail accounts in this person' name... any thoughts or suggestions? I do not wish to spend thousands of dollars to retain an attorney to figure this out - I should be able to fight this myself no?

Unfortunately the system is generally difficult - in part to prevent people from abusing it. So I'm not sure just how realistic it is to "go it alone". I'm no lawyer, and I'm not in law enforcement, but I would speculate that what law enforcement wants is simply proof that a crime has been committed, and that it's serious enough to warrant diverting their already thinly-spread energies to investigate it. But ultimately only they can tell you what they need with any specificity.
Leo
03-Oct-2009
Rajesh
January 6, 2010 1:46 AM

i have received threatening mails from a hotmail account where the sender's IP shows location as UK.I am positive it is sent from within India.Can the law enforcement agencies find the real sender.Is it possible for anyone to doctor the IP number and send a mail?

Dabi
May 15, 2010 10:13 PM

Rajesh, It is possible for someone to be using a proxy(Masking their IP with another which is real - but it isn't his) or they could be using other types of methods which basically means he can control what is sent when he sends his email and can doctor the IP as you said.

Accord
September 1, 2010 4:24 PM

My uncle's email was hacked all his business transactions are in that and people's e mails.I somehow found out the ip adress for the email, but can't find the location where the e
mail is being used from, coz the person who hacked it sent me an e mail in responce to my e mail thati thought I m sending to my uncle, I used the location finders and ran the ip adress 98.139.54.60 but it tells me my uncles location , how correct the location can be with the ip adress, I m very worried I need to know where the e mail is being used fro
bthen I will figur out who is using it, please help

pinkpisces
March 16, 2011 6:22 AM

Can you see if someone is tracking your Ip?

No. (Besides, "tracking your IP" doesn't have any meaning - but whatever you're thinking it means, no.)
Leo
16-Mar-2011

Ananya
October 19, 2011 2:14 AM

Yo can find the informations related to the ipaddress by using a an efficient tool. Check it out here: http://www.whoisthisip.com/

Wow. That tool got my IP address located wrong by at least two states and over 600 miles.
Leo
19-Oct-2011
Rosey
February 12, 2012 2:13 PM

You have stated that a "gmail" wouldn't be able to be traced back to me, without "legal" action? What are my rights to privacy, if the post on twitter or emails were not illegal?

I'm afraid that's a legal question I can't answer. I'm sure that it really depend on the specifics of the situation you're looking at.
Leo
12-Feb-2012
SAM
January 25, 2013 4:36 AM

i trace ip adress i find user name now i want to send message to user by cmd in window 7 ultimate pls tell me.

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