Fraudsters and bots use virtual and burner phone numbers to sign up to your service.
Our fake number checker identifies disposable, temporary, VoIP and virtual numbers in real time so you can protect your service from spam and fraud.
Prevent bots and fake accounts creation
A lot of shady websites provide temporary phone numbers for the sole purpose of receiving OTPs and bypassing phone number verifications. Fraudsters and bots use this to create fake accounts and spam your service. Our fake number checker and phone intelligence API help you block free, virtual, disposable and burner numbers before OTP.
API Support
Our API makes it simple to implement fake phone number verification in your application. Ideal for registration forms and user verification processes, it helps filter out disposable and virtual numbers before OTP. Use it as a virtual number checker, burner phone detector, or bot phone number check depending on your policy.
curl -X POST numcheckr.com/api/check-number \
-d '{ "phone": "+447497265710" }'
{
"active_line": true,
"is_disposable": true,
"public_sms_gateways": [
"online-sms.org",
"sms24.me"
],
"type": "MOBILE",
"country_code": "gb",
"country_name": "United Kingdom",
"carrier": "EE",
"e164_format": "+447497265710",
"national_format": "07497 265710",
"international_format": "+44 7497 265710"
...
}
Sanitize your CSV and Excel files
With our bulk validation module, you can verify thousands of phone numbers at once and flag the ones that don't belong to real users.
Quick answers about fake number checking and virtual number detection.
Look for VoIP carrier registration, presence on public SMS gateways, short lifespans and reuse across accounts. Our fake number checker and detector analyze these signals and more in real time.
Use a virtual number checker that combines carrier type, allocation (NPA‑NXX), and live blacklist intel from public SMS inboxes and rental providers. NumCheckr does this automatically.
A burner phone checker flags temporary, disposable or prepaid ranges frequently used for spam and trial abuse so you can block or step‑up verification before sending OTP.
It screens numbers for automation indicators—public inbox reuse, VoIP allocations and velocity patterns—so bots can’t mass‑create accounts with fake numbers.
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