Home / CPaaS / Flash call verification
One ring. Number verified.
Verify phone numbers with a missed call instead of a code, from one API.
We’ll give you a quick call.
Illustrative
Codes get lost, delayed and typed wrong. A missed call proves the number without any of that.
Flash call verification rings the user once. Your app confirms the call and the number is verified.
Four steps, one ring.
A number goes from unverified to verified without a code in between. Nothing for the user to wait for, read or type.
- 1
Request
Your app asks to verify a number.
- 2
Ring
The phone rings once from a verifying number.
- 3
Match
Your app confirms the number that called.
- 4
Verified
No code read, no code typed.
Nothing to read, nothing to enter.
With a code, the user waits, reads and types. With a flash call, they do nothing.
Wait, read, type.
Missed call
One ring, done.
Check the number before you call.
Number lookup checks line type, carrier and reachability before you verify, so you only ring numbers that can answer.
- Skip numbers that cannot receive a call
- See the carrier and line type up front
- Spend your verifications where they land
- Line type
- Mobile
- Carrier
- Reachable network
- Reachability
- Reachable
If the call doesn’t land, the next channel does.
AI channel fallback resends on the next best channel automatically.
AI picks where the user is most likely to see it.
If it is not delivered fast enough, it moves on.
The next best channel takes over, no extra code from you.
Start with one, confirm with another.
The same two-call flow as every Verify & OTP channel, so adding flash calls is a small change.
- One request starts the verification
- A second request confirms it
- The same webhooks as every other channel
→ { "to": "+44 7700 900123", "channel": "flash_call" } ← { "status": "pending" }
Use it where trust matters.
Apps and banks verify a number at the moments that matter. A flash call keeps those moments quick.
Illustrative
Ready for launch day, and for abuse.
Burst-ready delivery
Handle bursts during launches and peak logins on direct routes.
Pumping fraud blocking
Suspicious spikes in requests are caught before they cost you.
Verification analytics
Track conversion per channel, country and app version.
Illustrative
One API for every way to verify.
Flash calls join codes by SMS, voice and WhatsApp in Verify & OTP, with fraud checks and number lookup in the same API. Built for apps and banks, and sold by you under your brand.
Flash calls, answered.
It verifies a phone number with a missed call instead of a code. The phone rings once and the user is verified without reading or typing a code.
No. The call is a missed call, so there is nothing to pick up and nothing to type.
AI channel fallback resends on the next best channel automatically, such as SMS, voice or WhatsApp.
Yes. Number lookup checks line type, carrier and reachability before you send a verification.
Yes. It sits with Verify & OTP: codes by SMS, voice and WhatsApp, fraud checks and number lookup in one API.
Verify with a single ring.
Talk to partnerships about flash call verification in Verify & OTP.