- City / exchange
- Denver
- Province / state
- Colorado
- Country
- United States
- Carrier
- Level 3 Communications, LLC - Co
- Line type
- Likely VoIP / virtual number
- OCN
- 6118
- Status
- In Service
- Assigned
- 07/03/2014
- Number pooling
- Yes (block shared between carriers)
720-577 phone numbers
Denver, Colorado, United States · Level 3 Communications, LLC - Co
Reported numbers in 720-577
No numbers in this block have been reported by visitors yet.
Complaints filed with the FCC
- 720-577-21661 complaint · 2026-10-02
- 720-577-28521 complaint · 2026-10-02
What does the 720-577 prefix tell you?
Every North American number is area code + prefix + line. The prefix 720-577 was assigned to Level 3 Communications, LLC - Co on 07/03/2014 for the Denver exchange. A call from this block usually originates from a Level 3 Communications, LLC - Co customer in or near Denver, but caller ID can be spoofed to show any number.
Other Denver prefixes in 720
720-200720-201720-202720-203720-205720-206720-207720-208720-209720-210720-212720-213720-214720-215720-216720-217720-218720-219720-220720-221720-222720-223720-224720-225720-226720-227720-228720-229720-230720-231720-232720-233720-234720-235720-236720-237720-238720-239720-240720-241720-242720-243720-244720-245720-246720-247720-248720-249720-250720-251720-252720-253720-254720-255720-256720-257720-258720-259720-260720-261