Look-up IP Address Information

Martin Brinkmann
Jun 10, 2011
Updated • Jun 10, 2011
Software, Windows, Windows software

The IP (Internet Protocol, see The IP: The housenumber of your Computer for more information) address is a unique device identifier. Every website on the Internet has an IP address associated with it, as does every computer that is used to connect to the Internet. Computer users rarely come in contact with IP addresses, unless they analyze traffic, need to configure their router to configure rules or try to find out as much about a spammer as they can.

Sometimes it may be important to get detailed information about an IP address. Say you receive spam emails from a particular address all the time, or want to find out more about a person who stalks you, or are a webmaster who wants to find out who tries to brute force their server.

The IP address can provide you with valuable information in all cases. Please note that computer experts tend to use proxy servers or virtual private networks to cover their tracks. You would only see the last IP of the chain in this case, and not the IP of the device where it all started.

IPNetInfo is a lightweight portable software for Windows to look-up IP address information. It basically offers direct access to whois databases that you find on the Internet, for instance at a web host's website.

look-up ip address

The program displays a white text form on first startup that you can use to add IP addresses. It is possible to add IP addresses or hostnames manually, or paste them in from the Clipboard. Options are displayed at the bottom of the screen, of which some are already pre-selected.

The program will automatically resolve IP addresses and convert host names to IP addresses for instance. You can furthermore add a pause between look-ups which may be appropriate if you have added dozens, hundreds or even more IP addresses.


IPNetInfo will perform the selected operations. Each IP address is listed in a row in the main program interface. Core information, like the IP address and host name, country of origin, phone number or abuse email are displayed directly in each row. Detailed information about the selected row are displayed in the lower half of the program.

The information here resemble the whois look-ups on certain Internet sites, where information about a domain name or IP address can be obtained for free.

Reporting and exporting options are available. It is possible to create an HTML report of the look-ups, or save the information to text or xml files.

Another interesting option is located under Help > Show my current IP, which loads a web page where the current IP address of the computer is displayed. This is similar to our own IP address script where you get similar information.

You can download IPNetInfo from the developer website at Nirsoft. The program is fully compatible with 32-bit and 64-bit editions of the Windows operating system.


Tutorials & Tips

Previous Post: «
Next Post: «


  1. ScuzzleButt said on June 10, 2011 at 2:11 pm


    I noticed you masked the last two octets of an IP address in the first screen grab – but the adress appears unmasked in the second screen grab. You might want to mask it there as well if the address is snssitive.


    1. Martin Brinkmann said on June 10, 2011 at 2:40 pm

      Sb, thanks for noticing. Have blurred it as well :)

Leave a Reply

Check the box to consent to your data being stored in line with the guidelines set out in our privacy policy

We love comments and welcome thoughtful and civilized discussion. Rudeness and personal attacks will not be tolerated. Please stay on-topic.
Please note that your comment may not appear immediately after you post it.