Terms

For the site, the API, the curl and TXT answers, and the MCP server. Using them means you accept these.

DNS readings from our probes and the isitdns edge, each with when and where it was read.

Monitored domains: a daily snapshot.

Read-only. Nothing you ask changes any DNS.

Free. No API key.

As is. No warranty. Not advice.

A reading does not describe your network.

What is measured: how we measure.

Rate limit: 100 requests a minute per address (API, MCP); past it, requests are refused.

Not for: attack, flood, enumeration, private networks, working around the limit.

Automated use: allowed within the limit.

Not offered in Russia, Belarus, North Korea, Iran or Cuba.

Requests to isitdns are logged.

The privacy policy for every surface, MCP included: /privacy.

A reading names when it was read and where from. It is one read, from one place, at one time. Your own network is not in it; test your own path says how to read that.

The site, a tool, a field or these terms can change or go away at any time. This page is the version in force.

Questions and vulnerability reports: security@isitdns.net

Last changed 2026-10-29.