Free online tool
DNS Propagation Checker
Compare Cloudflare and Google Public DNS observations. Resolver disagreement can reflect normal caching.
Your result will appear here.
Related tools
DNS Toolkit
Look up A, AAAA, CNAME, MX, TXT, NS, CAA, and SOA records with available TTLs.
SPF Checker
Inspect SPF policies, syntax, include recursion, and DNS lookup limits without sending email.
DKIM Checker
Inspect one known DKIM selector. Find it in your provider settings or a message’s DKIM-Signature header.