The 509-540 exchange is serviced by the following companies within the WALLAWALLA ratecenter.
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA
Call are routed trough OCN 5812 and CLLI - WLWLWADE0MD (Common Language Location Identifier Code) and Point of Interface (POI) switch which is located in .
Who's number is 509-540 Numbers?