What this tool does
It checks A, AAAA, MX, NS, TXT, CAA, SOA, DNSSEC DS signals, and public resolver answers from multiple DNS providers.
DNS Diagnostics
DNS Propagation Checker
Check DNS records, public resolver answers, authoritative nameservers, CAA, and DNSSEC readiness.
Public resolvers
Nameserver health
CAA records
DNSSEC signal
Resolver comparison
Compare A record answers from Cloudflare, Google, and Quad9.
Authoritative checks
Review nameservers and whether their hostnames resolve.
Migration safety
Spot missing records before a nameserver or hosting move.
Tool guide
How to read DNS propagation results
DNS is the routing layer for websites, email, SSL, and migrations. This checker shows what public resolvers and authoritative records currently say about a domain.
Who it helps
- Customers changing nameservers
- Developers debugging DNS propagation
- Administrators confirming certificate and mail prerequisites
Usage instructions
Enter the domain without a path. Compare resolver answers and review the record table for missing or outdated values.
Understanding the output
Resolver differences usually mean propagation is still in progress. Missing A/AAAA or NS records are critical. Missing CAA or DS records may be acceptable, but should be intentional.
Why it matters for hosting
Before moving a site to UnderHost, DNS should be checked so web, mail, SSL, and control panel access continue working after cutover.
