Phone Number Carrier Lookup
Enter any phone number to identify the carrier, network type, and whether it is a mobile, fixed line, VoIP, or toll-free number.
✦ NumberOTP
Need numbers on real carrier networks?
NumberOTP numbers run on real mobile carrier networks — not VoIP. That's why they work for WhatsApp, Telegram, and 800+ other platforms that block virtual numbers.
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Frequently Asked Questions
What is a carrier lookup?
A carrier lookup identifies which mobile network or telephone carrier is assigned to a phone number. It tells you whether a number is on a mobile network (e.g. Vodafone, AT&T), a fixed line, a VoIP service, or a toll-free number.
Why would I need to check a phone number's carrier?
Developers use carrier lookups to route SMS vs voice calls efficiently, detect VoIP numbers before sending SMS (VoIP numbers often cannot receive SMS), and prevent fraud by identifying suspicious number types.
What is the difference between a mobile and VoIP number?
Mobile numbers are assigned to SIM cards on physical devices. VoIP numbers are virtual — they exist in software and are often used for anonymous communication, business lines, or test accounts. Many OTP systems reject VoIP numbers because they are harder to link to a real person.
Can I use a virtual number to bypass VoIP detection?
NumberOTP provides numbers on real carrier networks (not VoIP), which is why they work for WhatsApp, Telegram, Google, and other platforms that block virtual numbers. The quality of the underlying network matters.
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