A call center mapping system and method. Subscriber phone number data and general phone number data are acquired for a geographic area. The subscriber phone number data includes a location code. The general phone number data includes information that associates the number with a carrier type. The subscriber phone number data and the general phone number data are matched to filter and to carrier types that are identified as unreliable predictors of the location of a call center. The filtered data are compared to subscriber address data. The subscriber address data include an address of a subscriber and the location code. The subscriber address data are related to the filtered data 115 using the location code. The resulting data are related to map data to produce geo-encoded map data. The geo-encoded map data relates a physical location to a telephone number and a rate center. A geo-coding processor identifies a rate center boundary by projecting a line between subscriber locations based on the rate center name. The rate center boundary may be rendered on a map that may be graphically displayed or printed.