Local Calling Guide
Area code/prefix search
Denver, CO
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| NPA-NXX |
BLOCK |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 720-395
| 0 |
|
7421 AT&T - LOCAL |
656 |
|
2009-10-26 |
|
| 720-395
| 1 |
|
7421 AT&T - LOCAL |
656 |
|
2009-10-26 |
|
| 720-395
| 2 |
|
7421 AT&T - LOCAL |
656 |
|
2009-10-26 |
|
| 720-395
| 3 |
|
7421 AT&T - LOCAL |
656 |
|
2009-10-26 |
|
| 720-395
| 4 |
|
7421 AT&T - LOCAL |
656 |
|
2009-10-26 |
|
| 720-395
| 5 |
|
7421 AT&T - LOCAL |
656 |
|
2009-10-26 |
|
| 720-395
| 6 |
|
7421 AT&T - LOCAL |
656 |
|
2009-10-26 |
|
| 720-395
| 7 |
|
7421 AT&T - LOCAL |
656 |
|
2009-10-26 |
|
| 720-395
| 8 |
|
7421 AT&T - LOCAL |
656 |
|
2009-10-26 |
|
| 720-395
| 9 |
|
7421 AT&T - LOCAL |
656 |
|
2009-10-26 |
|
| 720-396
| A |
DNVRCOMAX5Z |
7421 AT&T - LOCAL |
656 |
|
|
|
| 720-396
| 0 |
|
7421 AT&T - LOCAL |
656 |
|
2009-10-26 |
|
| 720-396
| 1 |
|
7421 AT&T - LOCAL |
656 |
|
2009-10-26 |
|
| 720-396
| 2 |
|
7421 AT&T - LOCAL |
656 |
|
2009-10-26 |
|
| 720-396
| 3 |
|
7421 AT&T - LOCAL |
656 |
|
2009-10-26 |
|
| 720-396
| 4 |
|
7421 AT&T - LOCAL |
656 |
|
2009-10-26 |
|
| 720-396
| 5 |
|
7421 AT&T - LOCAL |
656 |
|
2009-10-26 |
|
| 720-396
| 6 |
|
7421 AT&T - LOCAL |
656 |
|
2009-10-26 |
|
| 720-396
| 7 |
|
7421 AT&T - LOCAL |
656 |
|
2009-10-26 |
|
| 720-396
| 8 |
|
6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO |
656 |
|
2026-04-13 |
|
| 720-396
| 9 |
|
6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO |
656 |
|
2026-04-13 |
|
| 720-397
| A |
DNVRCOMAX5Z |
7421 AT&T - LOCAL |
656 |
|
|
|
| 720-397
| 0 |
DNVRCOII3MD |
6529 T-MOBILE USA, INC. |
656 |
|
2009-10-27 |
|
| 720-397
| 1 |
DNVRCOII3MD |
6529 T-MOBILE USA, INC. |
656 |
|
2009-10-27 |
|
| 720-397
| 2 |
DNVRCOII3MD |
6529 T-MOBILE USA, INC. |
656 |
|
2009-10-27 |
|
| 720-397
| 3 |
DNVRCOII3MD |
6529 T-MOBILE USA, INC. |
656 |
|
2009-10-27 |
|
| 720-397
| 4 |
DNVRCOMAX5Z |
7421 AT&T - LOCAL |
656 |
|
2009-10-26 |
|
| 720-397
| 5 |
DNVRCOMAX5Z |
7421 AT&T - LOCAL |
656 |
|
2009-10-26 |
|
| 720-397
| 6 |
DNVRCO26XSX |
145J TERRA NOVA TELECOM INC. |
656 |
|
2024-02-14 |
|
| 720-397
| 7 |
DNVRCOII3MD |
6529 T-MOBILE USA, INC. |
656 |
|
2009-10-27 |
|
| 720-397
| 8 |
DNVRCOII3MD |
6529 T-MOBILE USA, INC. |
656 |
|
2009-10-27 |
|
| 720-397
| 9 |
DNVRCOII3MD |
6529 T-MOBILE USA, INC. |
656 |
|
2009-10-27 |
|
| 720-398
| A |
DNVRCOMD4MD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
656 |
|
|
|
| 720-398
| 0 |
DNVTCO56DS8 |
6118 LEVEL 3 COMMUNICATIONS, LLC - CO |
656 |
|
2011-04-16 |
|
| 720-398
| 1 |
DNVRCOMD4MD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
656 |
|
2010-08-26 |
|
| 720-398
| 2 |
DNVRCO37DS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
656 |
|
2011-04-13 |
|
| 720-398
| 3 |
DNVRCO37DS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
656 |
|
2011-04-13 |
|
| 720-398
| 4 |
DNVRCO37DS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
656 |
|
2011-04-13 |
|
| 720-398
| 5 |
DNVTCO56DS8 |
6118 LEVEL 3 COMMUNICATIONS, LLC - CO |
656 |
|
2010-10-01 |
|
| 720-398
| 6 |
DNVTCO56DS8 |
6118 LEVEL 3 COMMUNICATIONS, LLC - CO |
656 |
|
2010-10-01 |
|
| 720-398
| 7 |
AURRCO20AMD |
6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO |
656 |
|
2010-10-09 |
|
| 720-398
| 8 |
DNVRCOMA39Z |
318J COMCAST IP PHONE, LLC |
656 |
|
2010-09-19 |
|
| 720-398
| 9 |
DNVRCOMA39Z |
318J COMCAST IP PHONE, LLC |
656 |
|
2010-09-19 |
|
| 720-399
| A |
DNVTCO56DS8 |
6118 LEVEL 3 COMMUNICATIONS, LLC - CO |
656 |
|
|
|
| 720-399
| 0 |
DNVRCOMAXGZ |
078F BANDWIDTH.COM CLEC, LLC - CO |
656 |
|
2011-06-28 |
|
| 720-399
| 1 |
DNVTCO56DS8 |
6118 LEVEL 3 COMMUNICATIONS, LLC - CO |
656 |
|
2011-06-27 |
|
| 720-399
| 2 |
DNVTCO56DS8 |
6118 LEVEL 3 COMMUNICATIONS, LLC - CO |
656 |
|
2011-06-27 |
|
| 720-399
| 3 |
DNVTCOZIDS1 |
026D ONVOY, LLC - CO |
656 |
|
2012-02-12 |
|
| 720-399
| 4 |
DNVTCO56DS8 |
6118 LEVEL 3 COMMUNICATIONS, LLC - CO |
656 |
|
2011-06-27 |
|
| 720-399
| 5 |
DNVTCOZIDS1 |
026D ONVOY, LLC - CO |
656 |
|
2012-02-12 |
|
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Last updated: Tue, 31 Mar 2026 13:56:49 UTC
Sponsored by: ISP Telecom
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