Local Calling Guide
Area code/prefix search
NPA: 303
[Rate centres in NPA 303]
[Dial plan for NPA 303]
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| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 303-350
| 1 |
Denver |
CO |
DNVTCOZIDS1 |
026D ONVOY, LLC - CO |
656 |
|
2004-10-30 |
|
| 303-350
| 2 |
Denver |
CO |
DNVTCOZIDS1 |
026D ONVOY, LLC - CO |
656 |
|
2004-10-30 |
|
| 303-350
| 3 |
Denver |
CO |
DNVTCOZIDS1 |
026D ONVOY, LLC - CO |
656 |
|
2005-01-01 |
|
| 303-350
| 4 |
Denver |
CO |
DNVRCOETPS0 |
3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM |
656 |
|
2004-05-07 |
|
| 303-350
| 5 |
Denver |
CO |
DNVRCOETPS0 |
3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM |
656 |
|
2004-07-08 |
|
| 303-350
| 6 |
Denver |
CO |
DNVRCOII3MD |
6529 T-MOBILE USA, INC. |
656 |
|
2004-12-12 |
|
| 303-350
| 7 |
Denver |
CO |
DNVRCOII3MD |
6529 T-MOBILE USA, INC. |
656 |
|
2005-12-17 |
|
| 303-350
| 8 |
Denver |
CO |
DNVRCOII3MD |
6529 T-MOBILE USA, INC. |
656 |
|
2005-12-17 |
|
| 303-350
| 9 |
Denver |
CO |
DNVRCOMD4MD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
656 |
|
2006-02-26 |
|
| 303-351
| A |
Deckers |
CO |
DNVTCOZIDS1 |
026D ONVOY, LLC - CO |
656 |
|
|
|
| 303-351
| 0 |
Deckers |
CO |
DNVTCOZIDS1 |
026D ONVOY, LLC - CO |
656 |
|
2009-12-17 |
|
| 303-351
| 1 |
Deckers |
CO |
DNVRCOMAXGZ |
078F BANDWIDTH.COM CLEC, LLC - CO |
656 |
|
2008-11-20 |
|
| 303-351
| 2 |
Deckers |
CO |
DNVRCOMAXGZ |
078F BANDWIDTH.COM CLEC, LLC - CO |
656 |
|
2010-02-19 |
|
| 303-351
| 3 |
Deckers |
CO |
|
026D ONVOY, LLC - CO |
656 |
|
2009-02-09 |
|
| 303-351
| 4 |
Deckers |
CO |
|
026D ONVOY, LLC - CO |
656 |
|
2009-02-09 |
|
| 303-351
| 5 |
Deckers |
CO |
DNVTCO56DS8 |
6118 LEVEL 3 COMMUNICATIONS, LLC - CO |
656 |
|
2008-05-19 |
|
| 303-351
| 6 |
Deckers |
CO |
|
026D ONVOY, LLC - CO |
656 |
|
2009-06-25 |
|
| 303-351
| 7 |
Deckers |
CO |
DNVTCOZIDS1 |
026D ONVOY, LLC - CO |
656 |
|
2007-01-04 |
|
| 303-351
| 8 |
Deckers |
CO |
|
026D ONVOY, LLC - CO |
656 |
|
2008-08-21 |
|
| 303-351
| 9 |
Deckers |
CO |
|
026D ONVOY, LLC - CO |
656 |
|
2008-12-15 |
|
| 303-352
| A |
Denver |
CO |
DNVRCOMADS0 |
9636 QWEST CORPORATION |
656 |
|
|
|
| 303-353
| A |
Denver |
CO |
DNVRCOMA39Z |
318J COMCAST IP PHONE, LLC |
656 |
|
|
|
| 303-353
| 0 |
Denver |
CO |
DNVTCOZIDS1 |
026D ONVOY, LLC - CO |
656 |
|
2006-01-29 |
|
| 303-353
| 1 |
Denver |
CO |
DNVTCOZIDS1 |
026D ONVOY, LLC - CO |
656 |
|
2007-03-09 |
|
| 303-353
| 2 |
Denver |
CO |
DNVRCOMA39Z |
318J COMCAST IP PHONE, LLC |
656 |
|
2001-07-14 |
|
| 303-353
| 3 |
Denver |
CO |
DNVRCOMDDS1 |
7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO |
656 |
|
2001-07-14 |
|
| 303-353
| 4 |
Denver |
CO |
DNVRCOMA39Z |
318J COMCAST IP PHONE, LLC |
656 |
|
2001-07-14 |
|
| 303-353
| 5 |
Denver |
CO |
DNVRCOMDDS1 |
7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO |
656 |
|
2002-02-04 |
|
| 303-353
| 6 |
Denver |
CO |
DNVRCOMA39Z |
318J COMCAST IP PHONE, LLC |
656 |
|
2002-02-04 |
|
| 303-353
| 7 |
Denver |
CO |
DNVRCOMDDS1 |
7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO |
656 |
|
2002-02-04 |
|
| 303-353
| 8 |
Denver |
CO |
DNVRCOMA39Z |
318J COMCAST IP PHONE, LLC |
656 |
|
|
|
| 303-353
| 9 |
Denver |
CO |
DNVRCOMA39Z |
318J COMCAST IP PHONE, LLC |
656 |
|
2007-02-09 |
|
| 303-354
| A |
Denver |
CO |
DNVRCOMDDS0 |
7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO |
656 |
|
|
|
| 303-354
| 0 |
Denver |
CO |
|
7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO |
656 |
|
|
|
| 303-354
| 1 |
Denver |
CO |
|
7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO |
656 |
|
|
|
| 303-354
| 2 |
Denver |
CO |
|
7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO |
656 |
|
|
|
| 303-354
| 3 |
Denver |
CO |
|
883K AHOI LLC |
656 |
|
2026-04-08 |
|
| 303-354
| 4 |
Denver |
CO |
|
7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO |
656 |
|
|
|
| 303-354
| 5 |
Denver |
CO |
|
7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO |
656 |
|
|
|
| 303-354
| 6 |
Denver |
CO |
|
7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO |
656 |
|
|
|
| 303-354
| 7 |
Denver |
CO |
|
7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO |
656 |
|
|
|
| 303-354
| 8 |
Denver |
CO |
|
7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO |
656 |
|
|
|
| 303-354
| 9 |
Denver |
CO |
|
7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO |
656 |
|
|
|
| 303-355
| A |
Denver |
CO |
DNVRCOEADS0 |
9636 QWEST CORPORATION |
656 |
|
|
|
| 303-356
| A |
Denver |
CO |
DNVRCOII3MD |
6529 T-MOBILE USA, INC. |
656 |
|
|
|
| 303-356
| 0 |
Denver |
CO |
DNVRCOII3MD |
6529 T-MOBILE USA, INC. |
656 |
|
|
|
| 303-356
| 1 |
Denver |
CO |
DNVRCOII3MD |
6529 T-MOBILE USA, INC. |
656 |
|
|
|
| 303-356
| 2 |
Denver |
CO |
DNVRCOII3MD |
6529 T-MOBILE USA, INC. |
656 |
|
|
|
| 303-356
| 3 |
Denver |
CO |
DNVRCOII3MD |
6529 T-MOBILE USA, INC. |
656 |
|
|
|
| 303-356
| 4 |
Denver |
CO |
DNVRCOII3MD |
6529 T-MOBILE USA, INC. |
656 |
|
|
|
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Last updated: Tue, 16 Jun 2026 00:09:45 UTC
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