KRHTech Domain & IP Checker
Domain & IP Checker
Resolve a domain via public DNS, look up the host's location, and scan the homepage for signals of the technology it's built with. Runs on free public APIs — results are best-effort, not a full audit.
Host
DNS records
Technology signals
What this tool actually does.
Three lookups, run one after another, all against free public services.
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Resolve the A record
If you enter a domain, it's resolved to an IP address using Google's public DNS-over-HTTPS endpoint. An IP address you enter directly skips this step.
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Look up the host
The IP is checked against a public IP geolocation service to surface the city, region, country, ISP or hosting org, and ASN.
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Read the homepage markup
For a domain, the public homepage HTML is scanned for known patterns — WordPress, Shopify, React, Tailwind and more — to guess at the stack in use.
Questions about this tool.
For anything else, see the site-wide FAQ or get in touch.
How accurate is the technology-stack guess?
It's a pattern match against the public homepage HTML, not a server-side inspection. A site can hide its stack, and some signals — like a stray reference to "tw-" — can produce a false positive. Treat it as a hint, not a certainty.
Why does this tool need to contact a server?
A DNS lookup and a geolocation lookup are, by definition, requests to someone else's server. This is one of two tools on the site that can't run fully offline — the other is the email test rig.
Can I check an IP address instead of a domain?
Yes. Enter a raw IP and the tool skips DNS resolution, going straight to the host lookup. DNS records and technology signals are only shown for a domain, since an IP alone has no homepage to scan.
More on the bench.
Six other tools, same rule: free, no signup, one job each.