Free DNS Health Check & Analyzer

DNS health refers to the overall configuration quality of your domain's DNS records. Poor DNS health can cause website outages, email delivery failures, security vulnerabilities, and slow performance. Regular DNS health checks catch issues before they impact your users.

Every domain should have: NS records (nameservers), A and/or AAAA records (IP addresses), MX records (mail routing), SPF TXT record (email authentication), DMARC TXT record (email policy), and CAA records (certificate authority authorization). DNSSEC signing is strongly recommended.

DNSSEC (DNS Security Extensions) adds cryptographic signatures to DNS records, preventing DNS spoofing and cache poisoning attacks. Yes, you should enable DNSSEC. It is supported by all major registrars and DNS providers and adds an important layer of security.

DNS propagation typically takes 24-48 hours but can take up to 72 hours. To minimize delays: lower TTL values before making changes, verify records at your authoritative nameservers first, and check propagation across global regions using our tool.

For records that change rarely (NS, MX), use higher TTLs (3600-86400 seconds). For records that may change (A, CNAME), use moderate TTLs (300-3600 seconds). Before planned changes, temporarily lower TTLs to 60-300 seconds for faster propagation.

You should have at least two nameservers for redundancy, ideally on different networks and geographic locations. Most providers offer 2-4 nameservers. Having geographically distributed nameservers improves performance and resilience against DDoS attacks.