← Area code 307
307-230 phone numbers
Numbers 307-230-0000 to 307-230-9999 are assigned to Bandwidth.com CLEC, LLC (rate centre BORDER, WY, NANPA abbreviation).
Not assigned to any carrier: 307-230-1xxx, 307-230-2xxx, 307-230-3xxx, 307-230-4xxx, 307-230-5xxx, 307-230-6xxx, 307-230-7xxx, 307-230-8xxx, 307-230-9xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.