IPNetInfo is a small but powerful free IP address lookup and network information tool that allows users to retrieve detailed information about any IPv4 address. Developed by NirSoft, this lightweight utility functions much like a portable WHOIS lookup tool, making it ideal for network administrators, security researchers, and power users who need fast IP intelligence without relying on online services.
With IPNetInfo, you can quickly view important details such as the IP address owner, country and region, IP range, and available contact information including address, phone, fax, and email (when provided by the registry). Because it runs as a standalone executable, it can be stored and launched directly from a USB flash drive, leaving no installation footprint on the host system.