Hit Them In The Numbers
Scammers leave real numbers on your voicemail. Share it with NumBan and we report the number they want you to call back. Your name and email stay out of 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.
If we hear the callback number clearly, it is reported automatically. If not, you confirm it with one tap. We let you know when it is dead.
The loop
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
Voicemail audio and optional screenshots stay private and are not published on public number pages.
Audio and transcripts are private unless you choose to publish a voicemail on the number’s public page. Publishing is off by default.
Your personal email is not included in carrier reports.
Your rights
Read general information about the TCPA. NumBan does not evaluate individual legal claims or provide legal services.
Learn about TCPA rightsFAQ
NumBan helps identify and report scam callback numbers. Share a voicemail from Phone.app, check the callback details when asked, and follow reported numbers for status changes. Confirmed kills rank you on the leaderboard.
NumBan transcribes the shared voicemail audio on its servers and extracts possible callback numbers. You can share an uncropped screenshot after the audio; NumBan attaches it to a matching voicemail, or you choose the voicemail in the app. A screenshot is not filed as its own report. If the callback number is not clear, you confirm it before it is reported.
We pull the callback number out of the voicemail and report it. If we could not hear it clearly, you confirm it first. Your personal email is never included. NumBan then checks the number every week and tells you when it is dead.
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. Voicemail audio, screenshots, and recognized screenshot text are kept as private report data and are not published. Public number pages show aggregate, redacted details such as report counts, carrier information, and scam type.