Hit Them In The Numbers
Scammers leave real numbers on your voicemail. Share it with NumBan, review the callback number, and send a carrier report without putting your email on it.
The part that matters
A scammer can rotate the number that appeared on your phone. The number they ask you to call is the useful lead.
How it works
No new inbox, no spreadsheet, no detective board.
From Phone, send the voicemail to NumBan when a caller asks you to call a number back.
NumBan surfaces the callback number and the relevant part of the transcript for you to check.
Approve a carrier report when it is right, then keep your own record in one place.
The app, in one screen
The report view keeps the evidence, callback number, and your next action together—without turning a voicemail into a project.
Private by design
Your voicemail audio is kept as private evidence, not published on public number pages.
You review the callback number before approving a carrier report.
Your personal email stays out of the carrier complaint.
Your rights
The Telephone Consumer Protection Act gives you legal recourse against unwanted robocalls and scam voicemails. Some reports may qualify for further action through our partner law firm.
Learn about TCPA rightsFAQ
NumBan hits scam callback numbers. Share a voicemail from Phone.app. We extract the number they asked you to dial, file an abuse complaint with the hosting carrier, and track whether it goes dead. Confirmed kills rank you on the leaderboard.
NumBan extracts phone numbers from the voicemail transcript metadata and independently transcribes the audio on your device. We cross-check both sources to confirm the callback number before allowing a report. This prevents false reports and ensures evidence quality.
After you approve the report, NumBan sends a carrier abuse complaint to the company hosting the callback number. Your personal information is never shared — reports go through a NumBan-managed relay address. We then track the number weekly for status changes.
A kill is confirmed when a reported callback number becomes disconnected or is no longer routable after abuse complaints are filed. NumBan re-checks weekly, pings you when it dies, and counts it on the leaderboard.
No. Your voicemail audio is stored as private evidence and is never published. Public number pages on numban.com only show aggregate, redacted data such as report counts, carrier information, and scam type — never personal recordings or transcripts.