← Area code 641
641-310 phone numbers
Numbers 641-310-0000 to 641-310-9999 are assigned to Onvoy, LLC (rate centre MARSHALLTN, IA, NANPA abbreviation). 5 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 641-310-3xxx, 641-310-4xxx, 641-310-5xxx, 641-310-7xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.