DNS Tools
Inspect a domain's registration, delegation and records, with a focus on email authentication.
Whois Search
Look up domain registration details: registrar, creation and expiry dates, status codes, nameservers and DNSSEC, via RDAP with WHOIS fallback.
Nameserver Lookup
Find the authoritative nameservers (NS records) for any domain, their IP addresses, and the DNS provider of record that hosts the zone.
Email Record Lookup
Check a domain's email DNS records in one place: MX servers, DMARC policy, DKIM keys and SPF record with lookup count and warnings.
SPF Validation
Test whether an IP address or an entire CIDR range is authorized by a domain's SPF record. Full RFC 7208 evaluation of includes, macros and limits.
DNS Name Lookup
Query DNS records for any name: A, AAAA, BIMI, CNAME, DMARC, MX, SOA and TXT. See values and TTLs from public resolvers.