What is a VoIP number?
A VoIP number routes calls and texts over the internet instead of a cellular network. Learn VoIP vs mobile and check any number’s line type free.
A VoIP (Voice over IP) number is a phone number that sends calls and messages over the internet rather than a traditional mobile or landline network. Google Voice, Twilio, and most "virtual number" services issue VoIP numbers.
VoIP vs mobile
A mobile number is tied to a SIM on a carrier’s cellular network; a VoIP number lives on a server and can be used from any device with internet. Functionally they both call and text, but many services treat them differently — some block VoIP numbers for sign-up verification because they are cheap and disposable.
Why line type matters
When a service wants a "real" phone number, it often checks whether the line type is mobile or VoIP. That is why our number catalog flags non-VoIP (real-SIM) options — for verifications that reject VoIP, you need a genuine mobile number.
How to tell if a number is VoIP
Line-type lookup uses carrier and numbering-plan data to classify a number as mobile, landline, or VoIP. Our phone validator returns the detected type so you can see at a glance.
Try it now — free, no signup
Use the phone validator in your browser. Then, when you need it at scale with an API key and higher limits, grab the full Eveses API.