← Area code 307
307-424 phone numbers
Numbers 307-424-0000 to 307-424-9999 are assigned to Onvoy, LLC (rate centre LAKE, WY, NANPA abbreviation). 1 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 307-424-3xxx, 307-424-4xxx, 307-424-5xxx, 307-424-6xxx, 307-424-7xxx, 307-424-8xxx, 307-424-9xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.