Local Calling Guide
Area code/prefix search
Gaithersburg, MD
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| NPA-NXX |
BLOCK |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 227-529
| 0 |
VINNVACBDS0 |
876D ONVOY, LLC - MD |
236 |
|
2026-02-20 |
|
| 227-529
| 1 |
BTVLMD12CMA |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2026-02-27 |
|
| 227-529
| 2 |
BTVLMD12CMA |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2026-02-27 |
|
| 227-529
| 3 |
BTVLMD12CMA |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2026-02-27 |
|
| 227-529
| 4 |
BTVLMD12CMA |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2026-02-27 |
|
| 227-529
| 5 |
BTVLMD12CMA |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2026-03-07 |
|
| 227-529
| 6 |
WASHDCDP8MD |
071F BANDWIDTH.COM CLEC, LLC - MD |
236 |
|
2026-05-02 |
|
| 227-529
| 7 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2026-04-20 |
|
| 227-529
| 8 |
WASHDCDP8MD |
071F BANDWIDTH.COM CLEC, LLC - MD |
236 |
|
2026-04-11 |
|
| 227-529
| 9 |
VINNVACBDS0 |
876D ONVOY, LLC - MD |
236 |
|
2026-02-20 |
|
| 240-224
| A |
WASKDCFNAMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
236 |
|
|
|
| 240-224
| 0 |
WASHDCDP8MD |
071F BANDWIDTH.COM CLEC, LLC - MD |
236 |
|
2013-06-19 |
|
| 240-224
| 1 |
BTVLMD12CMA |
5562 METROPCS, INC. |
236 |
|
2014-06-05 |
|
| 240-224
| 2 |
WASKDCFNAMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
236 |
|
2013-06-02 |
|
| 240-224
| 3 |
WASHDCDP8MD |
071F BANDWIDTH.COM CLEC, LLC - MD |
236 |
|
2013-06-16 |
|
| 240-224
| 4 |
WASKDCFNAMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
236 |
|
2013-08-01 |
|
| 240-224
| 5 |
BTVLMD12CMA |
5562 METROPCS, INC. |
236 |
|
2013-06-14 |
|
| 240-224
| 6 |
BTVLMD12CMA |
5562 METROPCS, INC. |
236 |
|
2013-06-14 |
|
| 240-224
| 7 |
ARTNVAARXDY |
318J COMCAST IP PHONE, LLC |
236 |
|
2013-04-10 |
|
| 240-224
| 8 |
SLSPMD91DS0 |
568G PEERLESS NETWORK OF MARYLAND, LLC |
236 |
|
2013-05-03 |
|
| 240-224
| 9 |
SLSPMD91DS0 |
568G PEERLESS NETWORK OF MARYLAND, LLC |
236 |
|
2013-05-03 |
|
| 240-243
| A |
WASKDCFNPS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
|
|
| 240-243
| 0 |
WASKDCFNPS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
|
|
| 240-243
| 1 |
WASKDCFNPS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
|
|
| 240-243
| 2 |
WASKDCFNPS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
|
|
| 240-243
| 3 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2014-09-19 |
|
| 240-243
| 4 |
WASKDCFNPS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
|
|
| 240-243
| 5 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2022-11-18 |
|
| 240-243
| 6 |
ARTNVAARXDY |
318J COMCAST IP PHONE, LLC |
236 |
|
2018-11-21 |
|
| 240-243
| 7 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2019-01-22 |
|
| 240-243
| 8 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2023-07-11 |
|
| 240-243
| 9 |
WASKDCFNPS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
|
|
| 240-246
| A |
LNHMMDADGT0 |
8832 STARPOWER COMMUNICATIONS, LLC - MD |
236 |
|
|
|
| 240-246
| 0 |
LNHMMDADGT0 |
8832 STARPOWER COMMUNICATIONS, LLC - MD |
236 |
|
|
|
| 240-246
| 1 |
LNHMMDADGT0 |
8832 STARPOWER COMMUNICATIONS, LLC - MD |
236 |
|
|
|
| 240-246
| 2 |
LNHMMDADGT0 |
8832 STARPOWER COMMUNICATIONS, LLC - MD |
236 |
|
|
|
| 240-246
| 3 |
BTVLMD12CMA |
5562 METROPCS, INC. |
236 |
|
2005-07-02 |
|
| 240-246
| 4 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2005-01-03 |
|
| 240-246
| 5 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2005-01-03 |
|
| 240-246
| 6 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2005-01-03 |
|
| 240-246
| 7 |
ARTNVAARXDY |
318J COMCAST IP PHONE, LLC |
236 |
|
2005-07-25 |
|
| 240-246
| 8 |
LNHMMDADGT0 |
8832 STARPOWER COMMUNICATIONS, LLC - MD |
236 |
|
|
|
| 240-246
| 9 |
LNHMMDADGT0 |
8832 STARPOWER COMMUNICATIONS, LLC - MD |
236 |
|
|
|
| 240-252
| A |
MCLNVA23DS4 |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
236 |
|
|
|
| 240-252
| 0 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2004-03-03 |
|
| 240-252
| 1 |
MCLNVA23DS4 |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
236 |
|
2005-03-18 |
|
| 240-252
| 2 |
MCLNVA23DS4 |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
236 |
|
2011-02-03 |
|
| 240-252
| 3 |
MCLNVA23DS4 |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
236 |
|
2005-03-18 |
|
| 240-252
| 4 |
MCLNVA23DS4 |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
236 |
|
|
|
| 240-252
| 5 |
MCLNVA23DS4 |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
236 |
|
2005-03-18 |
|
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Last updated: Thu, 16 Jul 2026 02:21:55 UTC
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