Back .invalid Byelorussian .invalid BE-X-OLD .invalid Catalan .invalid CE .invalid Czech .invalid Danish .invalid German .invalid DIQ .invalid EML .invalid Basque
| Introduced | 1999 |
|---|---|
| TLD type | Reserved top-level domain |
| Status | Reserved to prevent conflict and confusion |
| Intended use | When necessary to show an address guaranteed to be invalid |
| Actual use | Session Initiation Protocol, for identity protection; address munging e.g. on Usenet |
| Documents | RFC 2606, 3325 |
The name invalid is reserved by the Internet Engineering Task Force (IETF) as a domain name that may not be installed as a top-level domain in the Domain Name System (DNS) of the Internet.[1]
- ^ D. Eastlake; A. Panitz (June 1999). Reserved Top Level DNS Names. Network Working Group. doi:10.17487/RFC2606. BCP 32. RFC 2606. Best Common Practice. Updated by RFC 6761.