Delivering a toll-free caller id on toll-free calls

A computer device comprising:

• logic configured to:
• receive a Session Initiation Protocol (SIP) telephone call;
• identify the SIP telephone call as originating from a first toll-free telephone number and destined for a second toll-free telephone number;
• determine a screened telephone number associated with the first toll-free telephone number;
• generate a diversion header that includes the determined screened telephone number for the SIP telephone call, in response to identifying the SIP telephone call as originating from the first toll-free telephone number and destined for the second toll-free telephone number;
• and
• send the SIP telephone call to a local exchange carrier network associated with the second toll-free telephone number.

A non-transitory computer-readable medium, storing instructions executable by one or more processors, the non-transitory computer-readable medium comprising:

• one or more instructions to receive a Session Initiation Protocol (SIP) telephone call;
• one or more instructions to identify the SIP telephone call as originating from a first toll-free telephone number and destined for a second toll-free telephone number;
• one or more instructions to determine a screened telephone number associated with the first toll-free telephone number;
• one or more instructions to generate a diversion header that includes the determined screened telephone number for the SIP telephone call, in response to identifying the SIP telephone call as originating from the first toll-free telephone number and destined for the second toll-free telephone number;
• and
• one or more instructions to send the SIP telephone call to a local exchange carrier network associated with the second toll-free telephone number.