About
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IP Network Tools is a set of 28 free tools for looking up and diagnosing IP, DNS, domain, email-authentication and web-server configuration. It is built for developers, system administrators and anyone who needs a quick, honest answer without creating an account.
Who runs this site
IP Network Tools is operated and maintained by IP Network Tools, an independent operator, at ipnetworktools.net. It is not affiliated with any registry, registrar, resolver operator or hosting provider whose data it displays. Editorial and technical decisions — which tools exist, how results are worded, what is deliberately not built — are made by the operator alone. Contact: [email protected].
What we believe
- Accuracy over hype. We show what the data actually says, distinguish "no record" from "lookup failed", and never invent a result when a service is unavailable.
- Privacy by default. No sign-up, no lookup history, and the values you type are never sent to analytics. See the Privacy Policy for exactly what the one third-party script on the site does receive.
- Do the maths locally. Anything that can run in your browser — subnet and CIDR calculation, validation, conversion, URL parsing — does, so that input never leaves your device.
- Safety. Server-side tools apply strict SSRF protection and rate limiting, and we deliberately omit abusive features such as full port scanners. See Security.
How results are produced
Every server-side answer names its source and the moment it was fetched, and every tool exposes the raw JSON behind the friendly view. The full description of each measurement — and where it can mislead — is on the Methodology page, and the providers we query are listed under Data Sources.
Data accuracy and how to report a problem
We hold no database of our own. DNS answers come from public resolvers and reflect their cache; registration data comes from RDAP registries and shows only what the registry publishes; HTTP results describe one request from our edge at one moment. That means a result can be stale, regionally different, or redacted at the source — and we say so on the result rather than papering over it.
If a result looks wrong, tell us: email [email protected] with the tool, the exact input, the timestamp shown under the result, and what you expected. Reports that identify a genuine bug are fixed and the fix is reflected on the tool page. Records about your own domain have to be corrected at your DNS provider or registrar — we can only read what they publish.
How it is built
The site is a static-first Astro application deployed on Cloudflare, with a small number of serverless functions for the features that genuinely need a network request (your public IP, DNS-over-HTTPS queries, RDAP, and header inspection). Most pages are pre-rendered, so they load fast and stay readable without JavaScript.
Roadmap
The toolset expands carefully. Optional tools such as a TLS certificate checker and a single-port checker are gated behind feature flags and ship only once they can be delivered safely and reliably.
Have feedback? See the contact page.