The 509-570 exchange is serviced by the following companies within the SPOKANE ratecenter.
"MCLEODUSA TELECOMMUNICATIONS SERVICES, INC.- WA"
Call are routed trough OCN 2981 and CLLI - SPKNWASPDS0 (Common Language Location Identifier Code) and Point of Interface (POI) switch which is located in SPOKANE.
Who's number is 509-570 Numbers?