How Do You Go About Getting Somones ISP?

Answer 1

1. Look at the domain name of the email address of the person you are interested in. If it is a common ISP like RoadRunner i.e. Time Warner it would end with "something.RR.COM" or "[e-mail]" then their ISP is RoadRunner or Comcast. Likewise with AOL. However this requires that you are familar with most of the major ISP's.
2. If you _receive_ an email and do not recognize the domain name, do the following:
a) open the email, and view the detailed header information (look under 'Options' or "View / Header", depends on your email client.
b) in the header information, look for something like "received from aaa.bbb.ccc.ddd" (i.e. the IP address of the sender's computer). Copy or write down the IP address.
c) open a DOS command prompt and type "nslookup " where is the address you copied or wrote down from the "received from" info above
d) look at the "Name:" line that is returned by the command (example:
Name: blah.tampabay.res.rr.com)
then look at the last part of the hostname, in this case "rr.com".
e) if you don't recognize the domain name, visit the whois query site at http://www.whoisquery.com/cgi-bin/whois.cgi and enter "rr.com" and click Query. The resulting screen will show you who the domain name registrar is, and provide a link that says "Click Here" to query their database and find out who owns it. Click on that link, then review the information returned (you may have to scroll down).

Note that this method is not foolproof, but unless someone is intentionally trying to hide their ISP information and be very anonymous, one of the methods above will help you identify who the ISP is.

To summarize:

Method 1 - infer their ISP from the domain name of their email address, if they use their ISP as their email system (and not Yahoo, or Hotmail, or Gmail etc.)

Method 2 - reverse lookup the IP address of the sender from their email header information, then lookup who owns the domain name

Hope this helps. If it seems confusing just follow it step by step and see if it works for you.

Answer 2

Ok, there are several methods.
If you want to get someone's ISP from an e-mail, you should check the e-mail headers, like this
Received: from mail.bieberdorf.edu (mail.bieberdorf.edu [124.211.3.78]) by mailhost.immense-isp.com (8.8.5/8.7.2) with ESMTP id LAA20869 for ; Tue, 18 Mar 1997 14:39:24 -0800 (PST)
Received: from alpha.bieberdorf.edu (alpha.bieberdorf.edu [124.211.3.11]) by mail.bieberdorf.edu (8.8.5) id 004A21; Tue, Mar 18 1997 14:36:17 -0800 (PST)
From: [e-mail] (R.T. Hood)
To: [e-mail]
Date: Tue, Mar 18 1997 14:36:14 PST
Message-Id:
X-Mailer: Loris v2.32
Subject: Lunch today?

So the sender's IP isa: 124.211.3.11

If the person whose IP you want to find is dirrectly connected to your computer, you can use the NETSTAT command included in any Windows version/Linux distro.
Same on Yahoo messenger, but only if the person is not behind a network address translation device.
Usually it appears like this: 124.211.3.11:5061 ESTABLISHED.
If you want to find more information about that IP address, check the world IP registries at:
http://www.ripe.net for europe
http://www.arin.net for US
http://www.apnic.net for Asia-Pacific
You can also use intrusion detection systems included in most firewalls if that IP attacks you.

Answer 3

You can lead them to a website you own that tracks down IP information and stores it somewhere that you can reach and then use a backwards search using the IP to find the ISP. Make sure you don't use the local IP.

Answer 4

Type in the email and click locate. Good Luck

Answer 5

if you have their email address, it's usually the @xxx part.

Answer 6

http://www.google.com/search?q=track+ip+address&rls=com.microsoft:en-us&ie=UTF-8&oe=UTF-8&startIndex=&startPage=1