DNS Lookup
Resolve A/AAAA/MX/NS/TXT/CNAME records, or reverse (PTR) for an IP.
What this DNS lookup tool does
Enter a host name to resolve its A, AAAA, CNAME, MX, NS and TXT records, or enter an IP address to get its PTR (reverse DNS). It is a quick way to confirm where a name points, which mail servers receive its mail, who is authoritative for the zone, and what verification/SPF strings live in TXT.
For registration data use the Domain Whois tool. To check signing, use the DNSSEC checker; to inspect mail authentication TXT in detail, use the Email auth checker. Background: DNS record types and reverse DNS.
Frequently asked questions
Why are there no records for a name that clearly works?
The name may be a CNAME to another host, or the records may be very fresh and not yet propagated to the resolver we use. Also, some records (like SRV or CAA) are not part of this tool's default set.
What is a PTR record?
A PTR maps an IP address back to a host name (reverse DNS). Mail servers in particular check that a sending IP has a sensible PTR that matches its forward record, so a missing PTR can hurt deliverability.
Does this query authoritative servers directly?
It uses the system resolver, which returns cached/recursive answers. For zone delegation or freshly changed records, an authoritative query with dig @ns may differ briefly until TTLs expire.