DNS Lookup
Network & DomainsResolve A, AAAA, MX, NS, TXT, CNAME, SOA, and CAA from Calnora’s resolver.
About this calculator
Resolve A, AAAA, MX, NS, TXT, CNAME, SOA, and CAA records for a hostname. Results come from Calnora’s resolver stack, not your laptop’s cache, so you can compare what a public server sees during a migration or outage.
Missing types show as resolver errors rather than empty success. TTL values and multi-answer records follow what authoritative servers return at query time — DNS can change within minutes after you publish an update at the registrar.
This is a diagnostic lookup, not a DNS host. It does not create, edit, or delete records in your zone file. After a cutover, wait for TTL expiry before declaring the old A record gone from every resolver. Keep a short note of the inputs you used so you can compare later runs.
How It Works & Formula
For each selected record type, the server calls Node dns.promises helpers such as resolve4, resolve6, resolveMx, and resolveTxt. Each call returns the record set or the resolver’s error message when the type is absent or the name fails to resolve.
Frequently Asked Questions
Why don’t I see the same A record as on my PC?
Local caches, split-horizon DNS, and different resolvers disagree. This page uses the server’s view.
Which record types are supported?
A, AAAA, MX, NS, TXT, CNAME, SOA, and CAA.
Can I look up reverse DNS?
Use the IP lookup tool for reverse PTR-style queries. This page is forward hostname lookup.