← Area code 423
423-792 phone numbers
Numbers 423-792-0000 to 423-792-9999 are assigned to Boost Subscriberco L.L.C. in Oakdale, TN. 2 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 423-792-2xxx, 423-792-4xxx, 423-792-5xxx, 423-792-6xxx, 423-792-7xxx, 423-792-8xxx, 423-792-9xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.