DNS Validation
Check records and compare answers from resolvers in multiple countries.
Full DNS resolution may take up to 48 hours. Anycast resolvers answer from the nearest PoP.
Validation looks for records a zone is expected to have: A, AAAA, MX, NS, SOA, TXT and SPF. Gaps are warnings or errors.
The country list queries public resolvers in those regions from this server. Anycast networks answer from the nearest PoP.
No NS or SOA means the zone is not published. Missing A hurts the web; missing MX hurts mail. If TXT has no v=spf1, the SPF tool will also warn.
NS says which servers hold the zone. Without it the name cannot resolve.
This host queries the listed resolver IPs. Google or Cloudflare anycast may not land in that city.
No, usually a warning. Not every site has IPv6 yet.
YYYYMMDDnn is common. After a change, confirm the serial increased.
No; round-robin or anycast is normal. Make sure each address is live.
A CNAME at apex collides with other records. Use A/AAAA or a provider ALIAS/ANAME.
This server sends UDP/53 queries to those public resolver IPs. It is not a global PoP network; it shows propagation drift.