DNS

3 NXDOMAIN

Non-Existent Domain. The queried domain name does not exist in the DNS namespace.

Quand vous voyez ce code

The domain has no DNS records at all — either it was never registered, has expired, or you have a typo in the hostname.

Comment résoudre

Double-check the domain spelling. If you own the domain, verify your registrar settings and ensure the nameservers are correctly delegated.

Spécification

Voir RFC / Spécification →

Équivalents inter-protocoles

HTTP 404 Not Found

Comparaisons

HTTP 404 Not Found vs DNS NXDOMAIN (RCODE 3) DNS NXDOMAIN (RCODE 3) vs NOERROR (RCODE 0)

Guides

DNS Response Codes (RCODEs) Explained DNS & Networking

Step-by-Step DNS Troubleshooting with dig and nslookup Debugging & Troubleshooting

Improving Email Deliverability: SPF, DKIM, and DMARC Setup Email Delivery

DNS TTL: How to Set TTL Values and Avoid Propagation Delays DNS & Networking

Glossaire

TCP/IP Port Number Latency Timeout Request-Response Model