(PBX), or by the originating carrier. The altering of caller ID information is allowed, provided it does not violate regulations in place regarding spoofing or fraud.

In the US, the caller's name, or CNAM information, is not sent during a call. Rather, the terminating carrier is responsible for providing the Caller ID information to its customer. The terminating carrier performs a database lookup using the caller's phone number to obtain the name information to display with Caller ID. If the data is with another carrier, then the terminating