DNS 0 NOERROR vs 3 NXDOMAIN
Both DNS 0 (NOERROR) and 3 (NXDOMAIN) belong to the DNS Response Codes (RCODEs) category. 0 indicates that no error condition. The query completed successfully and the response contains the requested data. Meanwhile, 3 means that non-Existent Domain. The queried domain name does not exist in the DNS namespace.
Описание
No error condition. The query completed successfully and the response contains the requested data.
Когда вы это видите
This is the normal, successful response to any DNS query — the name was resolved and the answer section contains the requested records.
Как исправить
No fix needed. RCODE 0 means the DNS lookup succeeded as expected.
Описание
Non-Existent Domain. The queried domain name does not exist in the DNS namespace.
Когда вы это видите
The domain has no DNS records at all — either it was never registered, has expired, or you have a typo in the hostname.
Как исправить
Double-check the domain spelling. If you own the domain, verify your registrar settings and ensure the nameservers are correctly delegated.
Ключевые различия
DNS 0: No error condition. The query completed successfully and the response contains the requested data.
DNS 3: Non-Existent Domain. The queried domain name does not exist in the DNS namespace.
You encounter 0 when this is the normal, successful response to any DNS query — the name was resolved and the answer section contains the requested records.
You encounter 3 when the domain has no DNS records at all — either it was never registered, has expired, or you have a typo in the hostname.
Когда что использовать
For 0 (NOERROR): No fix needed. RCODE 0 means the DNS lookup succeeded as expected. For 3 (NXDOMAIN): Double-check the domain spelling. If you own the domain, verify your registrar settings and ensure the nameservers are correctly delegated.