Local Calling Guide
Area code/prefix search
Columbia, MD
<< 1 2 3 4 5 6 7 8 9 10
| NPA-NXX |
BLOCK |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 667-447
| 1 |
|
876D ONVOY, LLC - MD |
238 |
|
2025-09-06 |
|
| 667-447
| 2 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2024-12-01 |
|
| 667-447
| 3 |
CLMAMDORGT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2024-12-23 |
|
| 667-447
| 4 |
|
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2025-09-08 |
|
| 667-447
| 5 |
CLMAMDORGT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2024-12-23 |
|
| 667-447
| 6 |
CLMAMDORGT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2024-11-21 |
|
| 667-447
| 7 |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2023-10-07 |
|
| 667-447
| 8 |
BLTQMD019MD |
490J BOOST SUBSCRIBERCO L.L.C. |
238 |
|
2025-01-22 |
|
| 667-447
| 9 |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2023-10-07 |
|
| 667-502
| A |
CLMAMDORGT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2025-02-10 |
|
| 667-502
| 0 |
|
876D ONVOY, LLC - MD |
238 |
|
2025-10-13 |
|
| 667-502
| 1 |
|
876D ONVOY, LLC - MD |
238 |
|
2026-01-04 |
|
| 667-502
| 2 |
|
490J BOOST SUBSCRIBERCO L.L.C. |
238 |
|
2025-08-25 |
|
| 667-502
| 3 |
|
490J BOOST SUBSCRIBERCO L.L.C. |
238 |
|
2025-09-29 |
|
| 667-502
| 4 |
|
490J BOOST SUBSCRIBERCO L.L.C. |
238 |
|
2025-10-27 |
|
| 667-502
| 5 |
|
876D ONVOY, LLC - MD |
238 |
|
2025-03-02 |
|
| 667-502
| 6 |
CLMAMDORGT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2025-02-10 |
|
| 667-502
| 7 |
CLMAMDORGT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2025-02-10 |
|
| 667-502
| 8 |
CLMAMDORGT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2025-02-10 |
|
| 667-502
| 9 |
CLMAMDORGT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2025-02-10 |
|
| 667-678
| A |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
|
|
| 667-678
| 0 |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2021-10-16 |
|
| 667-678
| 1 |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2021-10-16 |
|
| 667-678
| 2 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2021-10-15 |
|
| 667-678
| 3 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2021-10-24 |
|
| 667-678
| 4 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2021-10-24 |
|
| 667-678
| 5 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2021-10-24 |
|
| 667-678
| 6 |
BLTQMD013MD |
939H COMMIO, LLC |
238 |
|
2021-10-16 |
|
| 667-678
| 7 |
BLTQMD013MD |
939H COMMIO, LLC |
238 |
|
2021-10-16 |
|
| 667-678
| 8 |
BLTQMD013MD |
939H COMMIO, LLC |
238 |
|
2021-10-16 |
|
| 667-678
| 9 |
BLTQMD013MD |
939H COMMIO, LLC |
238 |
|
2021-10-16 |
|
| 667-786
| A |
CLMAMDNIDS1 |
7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD |
238 |
|
|
|
| 667-786
| 0 |
BLTMMDCH40Z |
5562 METROPCS, INC. |
238 |
|
2016-03-05 |
|
| 667-786
| 1 |
CLMAMDORGT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2016-01-05 |
|
| 667-786
| 2 |
CLMAMDORGT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2016-01-05 |
|
| 667-786
| 3 |
CLMAMDORGT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2016-01-05 |
|
| 667-786
| 4 |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2016-02-05 |
|
| 667-786
| 5 |
CLMAMDNIDS1 |
7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD |
238 |
|
2016-01-04 |
|
| 667-786
| 6 |
CLMAMDNIDS1 |
7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD |
238 |
|
2016-01-04 |
|
| 667-786
| 7 |
BLTOMDKHDS0 |
7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD |
238 |
|
2016-03-14 |
|
| 667-786
| 8 |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2016-02-06 |
|
| 667-786
| 9 |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2016-02-06 |
|
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Last updated: Thu, 05 Feb 2026 23:41:55 UTC
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