The 414-203 exchange is serviced by the following companies within the MILWAUKZN1 ratecenter.
MCIMETRO ACCESS TRANSMISSION SERVICES LLC
Call are routed trough OCN 7229 and CLLI - MILXWIILDS0 (Common Language Location Identifier Code) and Point of Interface (POI) switch which is located in MILWAUKEE.
Who's number is 414-203 Numbers?