Free DNS Tool
DNS Propagation & Health Checker
Check DNS records across Google DNS and Cloudflare DNS in real time. Look up A, AAAA, MX, NS, TXT, CNAME, and SOA records with TTL values using DNS-over-HTTPS.
DNS Record Types
Understanding DNS Records
Each record type serves a different purpose in the DNS system
Address Record
Maps a domain to an IPv4 address. The most fundamental DNS record. When you visit a website, your browser looks up the A record first to find the server's IP address.
IPv6 Address Record
Maps a domain to an IPv6 address. The IPv6 equivalent of an A record. As IPv6 adoption grows, AAAA records become increasingly important for accessibility.
Mail Exchange
Specifies which mail servers accept email for the domain, with priority values. Lower priority numbers are preferred. Essential for email delivery.
Name Server
Identifies the authoritative DNS servers for the domain. These servers hold the definitive DNS records. Usually set at the registrar level.
Text Record
Holds arbitrary text data. Commonly used for SPF email validation, DKIM signatures, DMARC policies, domain ownership verification, and SSL certificate validation.
Canonical Name
Creates an alias from one domain to another. Often used for subdomains (www.example.com → example.com) or CDN integration. Cannot coexist with other record types.
TTL Guide
Understanding TTL (Time To Live)
TTL determines how long DNS resolvers cache a record before querying again. Lower TTL means faster propagation but more DNS queries.
| TTL Value | Duration | Use Case | Propagation Time |
|---|---|---|---|
300 | 5 minutes | During DNS migrations, failover, active changes | ~5 min |
900 | 15 minutes | Frequently changing records, load-balanced services | ~15 min |
3600 | 1 hour | Standard websites, default for most records | ~1 hour |
14400 | 4 hours | Stable records that rarely change | ~4 hours |
86400 | 24 hours | NS records, very stable infrastructure | ~24 hours |