The 307-353 exchange is serviced by the following companies within the ALTA ratecenter.
COLUMBINE TELCO DBA SILVER STAR COMMUNICATIPMS
Call are routed trough OCN 2214 and CLLI - DRGSIDMADS0 (Common Language Location Identifier Code) and Point of Interface (POI) switch which is located in DRIGGS.
Who's number is 307-353 Numbers?