Source note · E.164 numbering and dial string normalization
libphonenumber warns that a number that is valid and connects today may be disconnected later, so validity checks are only true at a point in time.
Checked 2026-09-23
- Vendor
- Product
- libphonenumber
- Subsystem
- normalization pitfalls
- Deployment
- library
- Region
- not restricted
- Release range
- master as of 2026-09-23
- Checked
- 2026-09-23
Sources
- Falsehoods Programmers Believe About Phone Numbers — Google · tier 3 vendor-maintained repositories · Falsehood 6: Phone numbers that are valid today will always be valid
Cite this note
APA
WarmTransfer. (2026, September 23). E.164 numbering and dial string normalization: source note e164-numbering-validity-changes. WarmTransfer. https://warmtransfer.net/knowledge/claims/e164-numbering-validity-changes
BibTeX
@misc{warmtransfer-claim-e164-numbering-validity-changes,
title = {E.164 numbering and dial string normalization: source note e164-numbering-validity-changes},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/e164-numbering-validity-changes},
note = {Source note e164-numbering-validity-changes, checked 2026-09-23}
}