---
title: "What is VoIP number?"
url: "https://lookvalid.com/glossary/voip-number.md"
canonical_url: "https://lookvalid.com/glossary/voip-number"
last_updated: "2026-10-18"
type: "conceptual"
summary: "A VoIP number is a phone number delivered over the internet instead of a traditional phone line or a mobile network."
related: ["https://lookvalid.com/glossary/line-type.md", "https://lookvalid.com/glossary/number-portability.md", "https://lookvalid.com/glossary/sms-pumping.md", "https://lookvalid.com/products/phone.md"]
---

# What is VoIP number?

A VoIP number is a phone number delivered over the internet instead of a traditional phone line or a mobile network.

Many people use VoIP numbers legitimately for business lines and second numbers. They are also cheap to create in bulk, so they turn up often in fake sign-ups.

Where a country allocates ranges to VoIP providers, the numbering plan can flag them. Where VoIP numbers share ranges with ordinary lines, or have been ported in, only carrier data can tell.

## Related

- [What is Line type?](https://lookvalid.com/glossary/line-type.md)
- [What is Number portability?](https://lookvalid.com/glossary/number-portability.md)
- [What is SMS pumping?](https://lookvalid.com/glossary/sms-pumping.md)
- [Phone Numbering-Plan Validation API](https://lookvalid.com/products/phone.md)