The basics
Are these real numbers or VoIP relays?
Answer
Real numbers from carrier ranges inside national numbering plans. HushSMS uses mobile ranges, not VoIP blocks, so range database queries classify them as mobile. Last-hop delivery goes over IP, like most business SMS. Allocation, not transport, is what determines the classification.
The longer version
Every serious verification flow does the same lookup: take the submitted number, find the range it belongs to, read off the line type. A mobile-range allocation reads as a person. A VoIP-block allocation reads as disposable, because historically it was. Nothing about the message path changes that verdict, which is why "it is delivered over the internet" is not the objection people think it is. The practical test for any provider in this category is whether they will tell you which block you are buying from before you pay; the ones that will not are almost always selling the second kind.
See also
Related questions
Sources
- ITU-T Recommendation E.164 — The international public telecommunication numbering plan · International Telecommunication UnionCountry calling codes, national significant number lengths, number structure
- ITU-T E.164 national numbering plans (Operational Bulletin annex) · International Telecommunication UnionPer-country numbering plans, mobile ranges, trunk prefixes
- ITU-T Recommendation E.123 — Notation for national and international telephone numbers · International Telecommunication UnionHow the example numbers on country pages are formatted
- ISO 3166-1 — Codes for the representation of names of countries · International Organization for StandardizationTwo-letter country identifiers used throughout this catalogue
Answered by HushSMS, updated