About this number
(509) 657 is a landline based telephone number operated by Pioneer Telephone Co. and is located in zip code 99125 in the city of Endicott, Washington, which is in Whitman 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 657. It has an Operating Company Number (OCN) of 2437. A Common Language Location Identifier (CLLI) of ENDCWAXARS0. As well as a Local access and transport area (LATA) of 676. Zip code 99125 has a population of 527 as of the 2010 census.