← Area code 720
720-421 phone numbers
Numbers 720-421-0000 to 720-421-9999 are assigned to T-Mobile USA, Inc. in Denver, CO.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.
Reported numbers in 720-421
- 1 (720) 421-1513 13complaints
- 2 (720) 421-3031 2complaints
- 3 (720) 421-2007 1complaints
- 4 (720) 421-2108 1complaints
- 5 (720) 421-3135 1complaints
- 6 (720) 421-3190 1complaints
- 7 (720) 421-5603 1complaints
- 8 (720) 421-6313 1complaints
- 9 (720) 421-6623 1complaints
- 10 (720) 421-7622 1complaints
- 11 (720) 421-7650 1complaints
- 12 (720) 421-9116 1complaints
- 13 (720) 421-9182 1complaints