The 509-997 exchange is serviced by the following companies within the TWISP ratecenter.
"CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK"
Call are routed trough OCN 2408 and CLLI - TWISWAXADS0 (Common Language Location Identifier Code) and Point of Interface (POI) switch which is located in TWISP.
Who's number is 509-997 Numbers?