← Area code 414
414-499 phone numbers
Numbers 414-499-0000 to 414-499-9999 are assigned to T-Mobile USA, Inc. (rate centre MILWAUKZN1, WI, NANPA abbreviation). 3 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.