a system for providing location id services for telephone calls transfers location data describing the location of the calling device to the called device . rather than or in addition to providing the name and telephone number as is done through the conventional caller id service , the location of the calling device is displayed by the called device including the zip code , the longitude and latitude planar coordinates , or the street address . existing advanced intelligent network infrastructure may be adapted to provide the location id service , such as by providing location data queries from a signal switching point to a signal control point . the signal control point has access to a cnam database containing location id data fields in addition to conventional caller id data .