The 920-587 exchange is serviced by the following companies within the OOSTBURG ratecenter.
"LEVEL 3 COMMUNICATIONS, LLC - WI"
Call are routed trough OCN 5489 and CLLI - MILWWIDK3MD (Common Language Location Identifier Code) and Point of Interface (POI) switch which is located in MILWAUKEE.
Who's number is 920-587 Numbers?