The 414-600 exchange is serviced by the following companies within the MILWAUKZN4 ratecenter.
NEUTRAL TANDEM-ILLINOIS, LLC - WI
Call are routed trough OCN 225C and CLLI - MILWWIAUDS1 (Common Language Location Identifier Code) and Point of Interface (POI) switch which is located in MILWAUKEE.
Who's number is 414-600 Numbers?