← Area code 608
608-703 phone numbers
Numbers 608-703-0000 to 608-703-9999 are assigned to Onvoy, LLC in New Glarus, WI. 6 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 608-703-4xxx, 608-703-5xxx, 608-703-7xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.