← Area code 603
603-397 phone numbers
Numbers 603-397-0000 to 603-397-9999 are assigned to Comcast Ip Phone, LLC in Durham, NH. 7 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 603-397-1xxx, 603-397-6xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.
Reported numbers in 603-397
- 1 (603) 397-0660 2complaints
- 2 (603) 397-3142 2complaints
- 3 (603) 397-0022 1complaints
- 4 (603) 397-0395 1complaints
- 5 (603) 397-0730 1complaints
- 6 (603) 397-0800 1complaints
- 7 (603) 397-1892 1complaints
- 8 (603) 397-1945 1complaints
- 9 (603) 397-2881 1complaints
- 10 (603) 397-3283 1complaints
- 11 (603) 397-3510 1complaints
- 12 (603) 397-3629 1complaints
- 13 (603) 397-4026 1complaints
- 14 (603) 397-4101 1complaints
- 15 (603) 397-4749 1complaints
- 16 (603) 397-6054 1complaints
- 17 (603) 397-6929 1complaints
- 18 (603) 397-7536 1complaints
- 19 (603) 397-8685 1complaints
- 20 (603) 397-9341 1complaints