About this number
(509) 788 is a landline based telephone number operated by United Telephone-Northwest-Wa and is located in zip code 99350 in the city of Prosser, 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 788. It has an Operating Company Number (OCN) of 4521. A Common Language Location Identifier (CLLI) of PRSRWAXARS0. As well as a Local access and transport area (LATA) of 676. Zip code 99350 has a population of 12,979 as of the 2010 census.