DNS Tools

Diagnose every layer of name resolution.

Tools in this category

Dns Checker
/dns-checker
→
Dns Lookup
/dns-lookup
→
Dns Propagation
/dns-propagation
→
Reverse Dns
/reverse-dns
→
Whois Lookup
/whois-lookup
→
Domain Age
/domain-age
→
Subdomain Enum
/subdomain-enum
→

DNS is the address book of the internet. When a record is wrong, mail bounces, sites fail, certificates fall over. The tools below let you query authoritative DNS data directly — no caching layer in the way.

FAQ

DNS Checker vs DNS Lookup — which do I want?

DNS Checker queries multiple public resolvers in parallel and shows propagation. DNS Lookup queries a single authoritative server for a deeper record set including SPF/DMARC.

Why do I get different results from different tools?

Resolvers cache responses for the duration of each record's TTL. A change made minutes ago may not have propagated everywhere yet.

Need something else? Try Email Tools →