The 509-578 exchange is serviced by the following companies within the RICHLAND ratecenter.
ELECTRIC LIGHTWAVE, LLC DBA INTEGRA TELECOM - WA
Call are routed trough OCN 7173 and CLLI - SPKNWAZSPS0 (Common Language Location Identifier Code) and Point of Interface (POI) switch which is located in SPOKANE.
Who's number is 509-578 Numbers?