Local Calling Guide
Area code/prefix search
NPA: 303
[Rate centres in NPA 303]
[Dial plan for NPA 303]
<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 >>
| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 303-923
| 6 |
Denver |
CO |
DNVTCO56DS8 |
6118 LEVEL 3 COMMUNICATIONS, LLC - CO |
656 |
|
|
|
| 303-923
| 7 |
Denver |
CO |
DNVRCOMD4MD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
656 |
|
2023-06-24 |
|
| 303-923
| 8 |
Denver |
CO |
|
026D ONVOY, LLC - CO |
656 |
|
2008-08-29 |
|
| 303-923
| 9 |
Denver |
CO |
DNVTCO56DS8 |
6118 LEVEL 3 COMMUNICATIONS, LLC - CO |
656 |
|
|
|
| 303-924
| A |
Denver |
CO |
BLDRCOMADS0 |
9636 QWEST CORPORATION |
656 |
|
|
|
| 303-925
| A |
Denver |
CO |
ENWDCOABDS0 |
9636 QWEST CORPORATION |
656 |
|
|
|
| 303-926
| A |
Denver |
CO |
DNVRCOCWDS0 |
9636 QWEST CORPORATION |
656 |
|
|
|
| 303-927
| A |
Denver |
CO |
AURRCOBUDS0 |
7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO |
656 |
|
|
|
| 303-927
| 0 |
Denver |
CO |
DNVTCOZIDS1 |
026D ONVOY, LLC - CO |
656 |
|
2010-05-08 |
|
| 303-927
| 1 |
Denver |
CO |
AURRCOBUDS0 |
7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO |
656 |
|
|
|
| 303-927
| 2 |
Denver |
CO |
AURRCOBUDS0 |
7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO |
656 |
|
|
|
| 303-927
| 3 |
Denver |
CO |
AURRCOBUDS0 |
7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO |
656 |
|
|
|
| 303-927
| 4 |
Denver |
CO |
AURRCOBUDS0 |
7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO |
656 |
|
|
|
| 303-927
| 5 |
Denver |
CO |
AURRCOBUDS0 |
7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO |
656 |
|
|
|
| 303-927
| 6 |
Denver |
CO |
DNVRCOMA39Z |
318J COMCAST IP PHONE, LLC |
656 |
|
|
|
| 303-927
| 7 |
Denver |
CO |
DNVRCOMA39Z |
318J COMCAST IP PHONE, LLC |
656 |
|
|
|
| 303-927
| 8 |
Denver |
CO |
AURRCO20AMD |
6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO |
656 |
|
2007-10-15 |
|
| 303-927
| 9 |
Denver |
CO |
AURRCO20AMD |
6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO |
656 |
|
2007-10-22 |
|
| 303-928
| A |
Denver |
CO |
DNVRCO37DS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
656 |
|
|
|
| 303-928
| 0 |
Denver |
CO |
AURRCO20AMD |
6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO |
656 |
|
2007-08-17 |
|
| 303-928
| 1 |
Denver |
CO |
DNVRCO37DS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
656 |
|
|
|
| 303-928
| 2 |
Denver |
CO |
DNVRCO37DS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
656 |
|
|
|
| 303-928
| 3 |
Denver |
CO |
DNVRCO37DS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
656 |
|
|
|
| 303-928
| 4 |
Denver |
CO |
DNVRCO37DS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
656 |
|
|
|
| 303-928
| 5 |
Denver |
CO |
DNVRCO37DS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
656 |
|
|
|
| 303-928
| 6 |
Denver |
CO |
DNVRCO37DS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
656 |
|
|
|
| 303-928
| 7 |
Denver |
CO |
DNVTCOUZ0MD |
829J PAETEC ITEL, LLC |
656 |
|
2006-09-03 |
|
| 303-928
| 8 |
Denver |
CO |
DNVTCOUZ0MD |
829J PAETEC ITEL, LLC |
656 |
|
2006-09-03 |
|
| 303-928
| 9 |
Denver |
CO |
AURRCO20AMD |
6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO |
656 |
|
2007-08-17 |
|
| 303-929
| A |
Denver |
CO |
AURRCO20AMD |
6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO |
656 |
|
|
|
| 303-930
| A |
Denver |
CO |
DNVRCODCDS0 |
9636 QWEST CORPORATION |
656 |
|
|
|
| 303-931
| A |
Denver |
CO |
DNVRCOII3MD |
6529 T-MOBILE USA, INC. |
656 |
|
|
|
| 303-932
| A |
Denver |
CO |
DNVRCOCLDS0 |
9636 QWEST CORPORATION |
656 |
|
|
|
| 303-933
| A |
Denver |
CO |
DNVRCOCLDS0 |
9636 QWEST CORPORATION |
656 |
|
|
|
| 303-934
| A |
Denver |
CO |
DNVRCOWSDS0 |
9636 QWEST CORPORATION |
656 |
|
|
|
| 303-935
| A |
Denver |
CO |
DNVRCOWSDS0 |
9636 QWEST CORPORATION |
656 |
|
|
|
| 303-936
| A |
Denver |
CO |
DNVRCOWSDS0 |
9636 QWEST CORPORATION |
656 |
|
|
|
| 303-937
| A |
Denver |
CO |
DNVRCOWSDS0 |
9636 QWEST CORPORATION |
656 |
|
|
|
| 303-938
| A |
Denver |
CO |
BLDRCOMADS0 |
9636 QWEST CORPORATION |
656 |
|
|
|
| 303-939
| A |
Denver |
CO |
BLDRCOMADS0 |
9636 QWEST CORPORATION |
656 |
|
|
|
| 303-940
| A |
Denver |
CO |
ARVDCOMADS0 |
9636 QWEST CORPORATION |
656 |
|
|
|
| 303-941
| A |
Denver |
CO |
AURRCO20AMD |
6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO |
656 |
|
|
|
| 303-942
| A |
Denver |
CO |
AURRCOBUDS0 |
7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO |
656 |
|
|
|
| 303-942
| 0 |
Denver |
CO |
DNVRCOMA39Z |
318J COMCAST IP PHONE, LLC |
656 |
|
|
|
| 303-942
| 1 |
Denver |
CO |
DNVRCOMA39Z |
318J COMCAST IP PHONE, LLC |
656 |
|
|
|
| 303-942
| 2 |
Denver |
CO |
AURRCOBUDS0 |
7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO |
656 |
|
|
|
| 303-942
| 3 |
Denver |
CO |
AURRCOBUDS0 |
7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO |
656 |
|
|
|
| 303-942
| 4 |
Denver |
CO |
AURRCOBUDS0 |
7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO |
656 |
|
|
|
| 303-942
| 5 |
Denver |
CO |
AURRCOBUDS0 |
7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO |
656 |
|
|
|
| 303-942
| 6 |
Denver |
CO |
AURRCOBUDS0 |
7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO |
656 |
|
|
|
<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 >>
Last updated: Wed, 04 Mar 2026 03:00:52 UTC
Sponsored by: Callcentric - VoIP Internet phone service
Like this site? We accept donations via PayPal.