The Internet can be a dangerous place. One problem is that anybody can pretend to be somebody else. Or a hacker can break into an account and steal the ownerâ€™s identity. That means that there are times when you want to know the origin of an Internet IP address. In this tip Iâ€™ll discuss how to use the â€œWhoisâ€ tool to get information about an IP.
Using the â€œWhoisâ€ service
The general method of obtaining information about an IP is a service that goes by the name of â€œWhoisâ€. The actual person and address that is using an IP is not generally available and usually â€œWhoisâ€ will show only the location of the Internet service provider or a geographical area.
However, this geographical information provides clues that can be useful. If a Chinese IP is using your Gmail account and you live in America, that would be significant (unless you are traveling in China, of course). If an email from Great Aunt Matilda, who lives in Idaho, is sent with an IP from Kazakhstan, then some alarm bells should go off. Generally, any IP from an Internet service provider that doesnâ€™t match expectations could be a warning sign and give you notice to take preventative measures.
Personally, I have been recommending whatismyisp.com for many years. This site will often pinpoint the geographical location of an IP to a rather small area. Try it on your own IP and see how close it gets. Whatismyip.com will automatically detect your own IP.
â€œWhoisâ€ Freeware programs that run on your own computer
If you would prefer to search IP addresses from your own PC, there are also programs that you can run locally. One that I have used is from the well-known freeware programmer Karen Kenworthy. It is called â€œKarenâ€™s Whoisâ€ and can be downloaded here. It works in Windows XP, Vista, and 7. The figure below shows an IP search using the program.
More information: If you are not familiar with what an IP is, try this article for an easily understood explanation.