ipbx
VoIP Blacklist
https://voipbl.org/
Protect your business and PBX's against VoIP Fraud. Minimize the risks of attacks on your Telephony Server. Save bandwidth by using Geolocation filtering.
VoIPBL is a distributed VoIP blacklist that is aimed to protects against VoIP Fraud and minimizing abuse for network that have publicly accessible PBX's.