About this number
(310) 521 is a landline based telephone number operated by Pacific Bell and is located in zip code 90731 in the city of San Pedro, California, which is in Los Angeles County, and is in the West. It has a Number Planning Area (NPA - also known as an Area Code) of 310 and Network Numbering Exchange (NXX - also known as a prefix) of 521. It has an Operating Company Number (OCN) of 9740. A Common Language Location Identifier (CLLI) of SNPDCA01DS0. As well as a Local access and transport area (LATA) of 730. Zip code 90731 has a population of 59,662 as of the 2010 census.