DNS Lookup & Propagation Checker is a practical online utility for developers, sysadmins, and site owners who need to inspect DNS records and monitor propagation after changes. The tool queries DNS servers for A, AAAA, CNAME, MX, TXT, NS, and SOA records and shows how DNS responses vary across regions.

How it helps
Detect incorrect or missing records, verify mail exchanger (MX) configuration for email delivery, confirm TXT records for domain verification or SPF, and check CNAME chains. The propagation feature tests multiple public resolvers and provides a regional view so you can see when changes have fully propagated worldwide.

Features
- Query A/AAAA/CNAME/MX/TXT/NS/SOA records.
- Propagation map showing resolver results from different geographies.
- TTL values and suggestions for optimal TTL during migrations.
- Troubleshooting tips for common DNS issues and misconfigurations.
- Copyable raw DNS responses for diagnostics.

Benefits
Avoid downtime when migrating domains, validate DNS-based verifications (SSL, Google Search Console), and troubleshoot email delivery problems. Use the DNS Lookup & Propagation Checker whenever you update DNS to confidently track global propagation and prevent surprises.