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.
描述
No error condition. The query completed successfully and the response contains the requested data.
何时出现
This is the normal, successful response to any DNS query — the name was resolved and the answer section contains the requested records.
如何修复
No fix needed. RCODE 0 means the DNS lookup succeeded as expected.
描述
Non-Existent Domain. The queried domain name does not exist in the DNS namespace.
何时出现
The domain has no DNS records at all — either it was never registered, has expired, or you have a typo in the hostname.
如何修复
Double-check the domain spelling. If you own the domain, verify your registrar settings and ensure the nameservers are correctly delegated.
主要区别
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.
何时使用哪个
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.