RFC 6140: Registration for Multiple Phone Numbers in the Session Initiation Protocol (SIP)

Publisher

IETF / RFC Editor

URL

https://www.rfc-editor.org/rfc/rfc6140.html

Published

2011-03-01

Updated

unknown

Accessed

2026-09-25

HTTP status

200

License

IETF Trust Legal Provisions; no-redistribution; short excerpts and locators only

Source notes citing this source

• The RFC 6140 'bnc' (bulk number contact) URI parameter marks a Contact URI as standing for all the phone numbers assigned to the SIP-PBX; the registrar expands it into one mapping per number. in context
• An RFC 6140 registration carries the 'gin' option tag in both the Require and Proxy-Require header fields, so a proxy or registrar that lacks the capability rejects the request instead of misinterpreting it. in context
• RFC 6140 lets a SIP-PBX register a whole block of phone numbers with a service provider in a single REGISTER transaction, instead of one registration per address of record. in context

Cite this source record

APA

WarmTransfer. (2011, March 1). RFC 6140: Registration for Multiple Phone Numbers in the Session Initiation Protocol (SIP). WarmTransfer. https://warmtransfer.net/knowledge/sources/rfc-6140-multiple-numbers-registration

BibTeX

@misc{warmtransfer-rfc-6140-multiple-numbers-registration,
  title  = {RFC 6140: Registration for Multiple Phone Numbers in the Session Initiation Protocol (SIP)},
  author = {{WarmTransfer}},
  year   = {2011},
  url    = {https://warmtransfer.net/knowledge/sources/rfc-6140-multiple-numbers-registration},
  note   = {IETF / RFC Editor, accessed 2026-09-25}
}