The 920-581 exchange is serviced by the following companies within the FONDDU LAC ratecenter.
"OVATION COMMUNICATIONS OF WISCONSIN, INC."
Call are routed trough OCN 7767 and CLLI - MILXWI14DS0 (Common Language Location Identifier Code) and Point of Interface (POI) switch which is located in MILWAUKEE.
Who's number is 920-581 Numbers?