← Area code 720
720-400 phone numbers
Numbers 720-400-0000 to 720-400-9999 are assigned to T-Mobile USA, Inc. in Denver, CO. 3 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 720-400
- 1 (720) 400-8194 4complaints
- 2 (720) 400-8602 3complaints
- 3 (720) 400-1643 2complaints
- 4 (720) 400-9176 2complaints
- 5 (720) 400-4917 1complaints
- 6 (720) 400-5722 1complaints
- 7 (720) 400-7025 1complaints
- 8 (720) 400-7105 1complaints
- 9 (720) 400-7492 1complaints
- 10 (720) 400-7576 1complaints
- 11 (720) 400-7628 1complaints
- 12 (720) 400-7678 1complaints
- 13 (720) 400-8073 1complaints
- 14 (720) 400-8244 1complaints
- 15 (720) 400-8378 1complaints
- 16 (720) 400-8502 1complaints
- 17 (720) 400-8686 1complaints
- 18 (720) 400-8721 1complaints
- 19 (720) 400-8934 1complaints