RFC 3966 · PROPOSED STANDARD · 2004
SUN · 14 JUN 2026
The tel URI for Telephone Numbers
Overview
RFC 3966, “The tel URI for Telephone Numbers”, is a Proposed Standard document published in December 2004 by H. Schulzrinne. It obsoletes RFC 2806. It has since been updated by RFC 5341. The canonical text is published by the RFC Editor.
Abstract
This document specifies the URI (Uniform Resource Identifier) scheme "tel". The "tel" URI describes resources identified by telephone numbers. This document obsoletes RFC 2806. [STANDARDS-TRACK]
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
Read this RFC
The canonical text of RFC 3966 is hosted at rfc-editor.org. Available in TXT,HTML.
Relationships to other RFCs
Other RFCs from 2004
- RFC 3965 A Simple Mode of Facsimile Using Internet Mail
- RFC 3964 Security Considerations for 6to4
- RFC 3968 The Internet Assigned Number Authority Header Field Parameter Registry for the Session Initiation Protocol
- RFC 3969 The Internet Assigned Number Authority Uniform Resource Identifier Parameter Registry for the Session Initiation Protocol
- RFC 3960 Early Media and Ringing Tone Generation in the Session Initiation Protocol
- RFC 3959 The Early Session Disposition Type for the Session Initiation Protocol
- RFC 3956 Embedding the Rendezvous Point Address in an IPv6 Multicast Address
- RFC 3955 Evaluation of Candidate Protocols for IP Flow Information Export