Beyond 'is this a real number?'
Validating a phone number is about far more than length. A complete check answers four questions.
Validity
Is the number in an assigned, dialable range for its country? Verix uses Google's libphonenumber rules for accuracy across 200+ countries.
Line type
Mobile, fixed-line, or VoIP? VoIP numbers (think free internet numbers) are disproportionately used in fraud and one-time-passcode abuse. Treat them with extra caution.
Carrier & region
Knowing the carrier and region helps with routing SMS, detecting impossible-travel patterns and spotting numbers that don't match a user's claimed location.
Using phone signals in practice
For high-risk actions, require a non-VoIP mobile number. For SMS campaigns, drop invalid numbers before you pay to message them. Verix returns all of this in a single call.
Ready to clean your data? Try Verix free — 50 verifications a month, no card required. Verify email, phone and IP risk in one call.