The 920-550 exchange is serviced by the following companies within the SHEBOGNFLS ratecenter.
"LEVEL 3 COMMUNICATIONS, LLC - WI"
Call are routed trough OCN 5489 and CLLI - CHCGILGMDS6 (Common Language Location Identifier Code) and Point of Interface (POI) switch which is located in CHICAGO.
Who's number is 920-550 Numbers?