← Area code 414
414-940 phone numbers
Numbers 414-940-0000 to 414-940-9999 are assigned to United States Cellular (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.