← Area code 203
203-604 phone numbers
Numbers 203-604-0000 to 203-604-9999 are assigned to Level 3 Communications, LLC in Norwalk, CT. 5 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.
Reported numbers in 203-604
- 1 (203) 604-0196 13complaints
- 2 (203) 604-0259 5complaints
- 3 (203) 604-8450 2complaints
- 4 (203) 604-9915 2complaints
- 5 (203) 604-1375 1complaints
- 6 (203) 604-1439 1complaints
- 7 (203) 604-1475 1complaints
- 8 (203) 604-2291 1complaints
- 9 (203) 604-2294 1complaints
- 10 (203) 604-2299 1complaints
- 11 (203) 604-2302 1complaints
- 12 (203) 604-2304 1complaints
- 13 (203) 604-2310 1complaints
- 14 (203) 604-2384 1complaints
- 15 (203) 604-2495 1complaints
- 16 (203) 604-2621 1complaints
- 17 (203) 604-2644 1complaints
- 18 (203) 604-2856 1complaints
- 19 (203) 604-3235 1complaints
- 20 (203) 604-6048 1complaints
- 21 (203) 604-6264 1complaints
- 22 (203) 604-6521 1complaints
- 23 (203) 604-6535 1complaints
- 24 (203) 604-6707 1complaints
- 25 (203) 604-8517 1complaints
- 26 (203) 604-8726 1complaints