← Area code 442
442-423 phone numbers
Numbers 442-423-0000 to 442-423-9999 are assigned to T-Mobile USA, Inc. (rate centre LKISABELLA, CA, NANPA abbreviation). 5 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 442-423-2xxx, 442-423-4xxx, 442-423-6xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.