Non-VoIP number
Definition
A phone number issued by a mobile carrier for a SIM, so line type checks report it as mobile rather than VoIP.
Non-VoIP number, explained
A non-VoIP number is a phone number that a carrier issued for mobile service, the same kind of number you get with a regular SIM or eSIM. When an app runs a line type lookup, it is reported as mobile rather than VoIP. Because platforms trust mobile numbers more, non-VoIP numbers are accepted at sign-up far more often than Google Voice or TextNow lines. Noir SMS numbers are mobile numbers from carriers for this reason. Acceptance is still never guaranteed, since apps also weigh other signals, and if no code arrives within 20 minutes the charge is refunded.
Related terms
VoIP number
A phone number that runs over the internet rather than a mobile carrier's SIM, such as Google Voice or TextNow lines.
Line type lookup
A check that tells an app whether a number is mobile, landline or VoIP, and often which carrier owns it.
Carrier
A mobile network operator or provider that issues phone numbers and delivers calls and texts.