Source note · Wrong or missing caller ID on outbound calls
In a tel URI a global number is identified by a leading '+' and must consist of the E.164 country code and national number.
Checked 2026-09-25
Globally unique numbers are identified by the leading '+' character.
- Vendor
- IETF
- Product
- tel URI
- Subsystem
- number format
- Deployment
- any
- Region
- not restricted
- Release range
- RFC 3966
- Checked
- 2026-09-25
Sources
- RFC 3966: The tel URI for Telephone Numbers — IETF / RFC Editor · tier 1 standards and regulators · Section 5.1.4 (global numbers)
Cite this note
APA
WarmTransfer. (2026, September 25). Wrong or missing caller ID on outbound calls: source note caller-id-presentation-problems-tel-global-plus. WarmTransfer. https://warmtransfer.net/knowledge/claims/caller-id-presentation-problems-tel-global-plus
BibTeX
@misc{warmtransfer-claim-caller-id-presentation-problems-tel-global-plus,
title = {Wrong or missing caller ID on outbound calls: source note caller-id-presentation-problems-tel-global-plus},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/caller-id-presentation-problems-tel-global-plus},
note = {Source note caller-id-presentation-problems-tel-global-plus, checked 2026-09-25}
}