CID (Company Identifier)

Access Infrastructure Provider ID

A 3-5 character identifier that distinguishes the entity providing voice service (e.g., Wireline, Wireless, VoIP, PBX, etc.) to the end user. The company identifier registry is maintained by NENA in a nationally accessible database

Also known as Company Identifier (ID) 1 or CID 1

Data Provider Company ID

A 3-5 character identifier that distinguishes the source of the ALI record information (e.g., service provider/reseller/private switch owner).

Also known as Company Identifier (ID) 2 or CID 2