Insurance company code numbers are identification numbers assigned to insurance companies by state and federal agencies, according to Safeco.com. These numbers are used as the primary identification for each company during most interactions with the state, including on tax forms and annual reports.
On a national level, insurance company code numbers are assigned by the National Association of Insurance Commissioners, as noted by Safeco.com. However, state agencies often assign their own codes to insurance companies in lieu of using the NAIC number. In some instances, the Department of Motor Vehicles also opts to use their own identification codes when dealing with insurance companies, although these are limited strictly to DMV-related business.