CENKeep your Local Number
Your existing 315-1234 becomes Global CEN Number 214-315-1234. Your network continues to assign blocks and extensions.
Community Exchange Network
Independent networks.
Connected.
CEN connects community telephone and PBX networks. Keep your existing numbers, infrastructure and administration. Reach other networks through a shared federation directory.
Your numbers. A global address.
Each CEN Network receives a unique three-digit CEN Area Code. No local renumbering required.
214CEN AREA CODE
315LOCAL BLOCK
1234MEMBER NUMBER
Dial with an access prefix
Typically dial 88-214-315-1234. The recommended prefix 88 is local configuration, not part of the official CEN number. It keeps ordinary PSTN dialing on your existing routes.
Overlapping blocks work
Another network can keep the same Local Number: 527-315-1234 is a separate destination because its CEN Area Code is different.
Your network stays yours.
Retain your PBXs, internal routing, directory/API, policies and PSTN trunks. CEN selects the destination Member Network; that network’s Routing API resolves the Local Number and final PBX.
How federation works →Simple integration
Use the PHP client with an existing backend, or generate a FreePBX bundle with PHP or Python AGI. Network API keys authenticate directory lookups. Operators establish IAX trust separately.
Get Integration Files