Wangiri Premium Number Scam

“Wangiri” is a Japanese word for “one ring and cut”. It’s a scam where they trick people into calling back premium rate numbers by placing high volumes of calls and ringing just once so the callee sees a “missed call’ notice. When the victim calls back, they are billed a high per-minute rate for the call and the scammer shares the revenue with the phone company.

Spotting this scam in your CDR is quite easy. The calls will only have 1 ring and then get immediately canceled by the originator resulting in high 487 counts and almost no connected calls. Since none of the calls actually connect, scammers have to blend this traffic into other traffic so the account-level 487% doesn’t tip off the service provider (you) that is unknowingly carrying the bad traffic. We unblend the traffic at the account level and then help you isolate which IP(s) it is coming from so you can stop it at the source.