# VoIP vs non-VoIP numbers for verification

The single most useful thing to understand about verification numbers is the line-type check.

## What is the difference between VoIP and non-VoIP numbers?

A non-VoIP number is a mobile carrier line backed by a SIM; a VoIP number is routed over the internet by a provider. Apps query the carrier database before sending an OTP and refuse VoIP types when they want to make sign-ups expensive. In the catalog, non-VoIP pools are labeled physical SIM.

## How the check works

Number portability databases and carrier lookup services return the current carrier and the line type for any number. The lookup costs the app a fraction of a cent and takes milliseconds, so most large services run it on every sign-up.

## Who refuses VoIP

- Always: Google, WhatsApp, PayPal, Venmo, Cash App, most banks, Uber.
- Often: Tinder, Bumble, Amazon, Microsoft, Discord in the US.
- Rarely: Telegram, forums, newsletters, most games.

## Why non-VoIP costs more

Each physical-SIM number is a real card in a real device somewhere, with a carrier plan behind it. Virtual ranges scale in software. The price gap reflects that.

## VoIP or physical SIM, side by side

| Criterion | Physical-SIM number | VoIP number |
|---|---|---|
| Origin | Mobile carrier, real SIM | Internet provider |
| Passes Google, WhatsApp, PayPal | Yes | Usually refused |
| Receives short-code SMS | Yes | Often not |
| Price per code | Higher | Lower |
| Best for | Strict apps, accounts you keep | Messaging, social, forums |

## FAQ

**Can a VoIP number ever pass Google?** Occasionally, in some countries. Not reliably enough to pay for the attempt.

**How do I know which pool a country uses?** The catalog labels each country; app pages say when physical SIM is required.

**Is physical SIM always worth it?** No. For Telegram and most social apps the virtual pool works and costs less.

**Can VoIP numbers receive short codes?** Often not. Physical-SIM numbers receive everything.

Published: 2026-10-30

Source: https://smsnitro.com/blog/voip-vs-non-voip-numbers-for-verification