830-300 phone numbers

Numbers 830-300-0000 to 830-300-9999 are assigned to Onvoy, LLC (rate centre COST, TX, NANPA abbreviation). 2 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 830-300-1xxx, 830-300-2xxx, 830-300-4xxx, 830-300-5xxx, 830-300-7xxx, 830-300-9xxx — calls from these use spoofed caller IDs.

Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.

Reported numbers in 830-300