← Area code 503
503-421 phone numbers
Numbers 503-421-0000 to 503-421-9999 are assigned to T-Mobile USA, Inc. in Portland, OR.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.
Reported numbers in 503-421
- 1 (503) 421-2109 8complaints
- 2 (503) 421-1947 2complaints
- 3 (503) 421-6798 2complaints
- 4 (503) 421-0033 1complaints
- 5 (503) 421-2110 1complaints
- 6 (503) 421-2716 1complaints
- 7 (503) 421-2942 1complaints
- 8 (503) 421-3628 1complaints
- 9 (503) 421-4748 1complaints
- 10 (503) 421-4780 1complaints
- 11 (503) 421-6810 1complaints
- 12 (503) 421-6942 1complaints
- 13 (503) 421-7961 1complaints
- 14 (503) 421-8097 1complaints
- 15 (503) 421-9938 1complaints