About this number
(509) 377 is a landline based telephone number operated by United Telephone-Northwest-Wa and is located in zip code 99352 in the city of Richland, Washington, which is in Benton County, and is in the West. It has a Number Planning Area (NPA - also known as an Area Code) of 509 and Network Numbering Exchange (NXX - also known as a prefix) of 377. It has an Operating Company Number (OCN) of 4521. A Common Language Location Identifier (CLLI) of CLMAWAXARS0. As well as a Local access and transport area (LATA) of 676. Zip code 99352 has a population of 26,975 as of the 2010 census.