The 253-479 exchange is serviced by the following companies within the KENT ratecenter.
"ALLEGIANCE TELECOM OF WASHINGTON, INC."
Call are routed trough OCN 2753 and CLLI - STTMWAGVDS0 (Common Language Location Identifier Code) and Point of Interface (POI) switch which is located in SEATTLE.
Who's number is 253-479 Numbers?