Source note · SS7 and carrier interworking concepts
Under RFC 4694, a network node MUST NOT retrieve number portability information for a geographical number if the tel URI already carries the npdi parameter.
Checked 2026-09-24
If the 'tel' URI contains the 'npdi' parameter, the network node MUST NOT retrieve the NP-related information for geographical telephone numbers.
- Vendor
- IETF
- Product
- tel URI
- Subsystem
- number portability
- Deployment
- carrier
- Region
- not restricted
- Release range
- current as of 2026-09-24
- Checked
- 2026-09-24
Sources
- RFC 4694: Number Portability Parameters for the "tel" URI — IETF / RFC Editor · tier 1 standards and regulators · Section 5.1
Cite this note
APA
WarmTransfer. (2026, September 24). SS7 and carrier interworking concepts: source note ss7-carrier-interworking-npdi-no-redip. WarmTransfer. https://warmtransfer.net/knowledge/claims/ss7-carrier-interworking-npdi-no-redip
BibTeX
@misc{warmtransfer-claim-ss7-carrier-interworking-npdi-no-redip,
title = {SS7 and carrier interworking concepts: source note ss7-carrier-interworking-npdi-no-redip},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/ss7-carrier-interworking-npdi-no-redip},
note = {Source note ss7-carrier-interworking-npdi-no-redip, checked 2026-09-24}
}