Local Calling Guide
Area code/prefix search
NPA: 720
[Rate centres in NPA 720]
[Dial plan for NPA 720]
NXX: 603
| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 720-603
| A |
Denver |
CO |
AURSCOFWDS0 |
4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO |
656 |
|
|
|
| 720-603
| 0 |
Denver |
CO |
|
078F BANDWIDTH.COM CLEC, LLC - CO |
656 |
|
2017-10-24 |
|
| 720-603
| 1 |
Denver |
CO |
|
078F BANDWIDTH.COM CLEC, LLC - CO |
656 |
|
2017-10-24 |
|
| 720-603
| 2 |
Denver |
CO |
|
4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO |
656 |
|
2017-10-23 |
|
| 720-603
| 3 |
Denver |
CO |
|
6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO |
656 |
|
2018-05-16 |
|
| 720-603
| 4 |
Denver |
CO |
|
318J COMCAST IP PHONE, LLC |
656 |
|
2017-11-19 |
|
| 720-603
| 5 |
Denver |
CO |
|
5562 METROPCS, INC. |
656 |
|
2017-10-24 |
|
| 720-603
| 6 |
Denver |
CO |
|
5562 METROPCS, INC. |
656 |
|
2017-10-24 |
|
| 720-603
| 7 |
Denver |
CO |
|
5562 METROPCS, INC. |
656 |
|
2017-10-24 |
|
| 720-603
| 8 |
Denver |
CO |
|
078F BANDWIDTH.COM CLEC, LLC - CO |
656 |
|
2017-10-24 |
|
| 720-603
| 9 |
Denver |
CO |
|
078F BANDWIDTH.COM CLEC, LLC - CO |
656 |
|
2017-10-24 |
|
Last updated: Tue, 13 Jan 2026 21:50:02 UTC
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