About itoolkit

itoolkit is a small set of free network tools that do one thing each and do it well: find your IP address, look up any IP, check DNS records, find domain registration data and validate SPF and DMARC records.

Why we built it

Most network tool websites are slow, covered in ads and hard to read. We wanted tools that answer in under a second, explain the results in plain English, work well on a phone and in dark mode, and never get between you and the result with an ad.

How the tools work

• DNS, SPF and DMARC: live queries through our own recursive resolver.
• WHOIS: RDAP, the official registration data protocol, with classic WHOIS as a fallback.
• IP location: the DB-IP Lite databases (CC BY 4.0), updated monthly.

Results are cached for a short time (5 minutes for DNS, 24 hours for WHOIS) to keep things fast and to be polite to registries.

Who is behind itoolkit

itoolkit is built and maintained by Alexei, a developer who works with servers, DNS and email every day. Questions, bugs or ideas for new tools? Write to hello@itoolkit.dev.