# VoIP number

A VoIP number is a phone number delivered over the internet rather than a mobile carrier SIM; apps can detect this through a carrier lookup and often refuse it for verification.

## What is VoIP number?

A VoIP number is a phone number delivered over the internet rather than a mobile carrier SIM; apps can detect this through a carrier lookup and often refuse it for verification.

## How apps detect VoIP

Every number belongs to a carrier and a line type (mobile, landline, VoIP). Services query that database before sending an OTP. Google, WhatsApp, PayPal and banks reject VoIP types outright.

Source: https://smsnitro.com/glossary/voip