Local Calling Guide
Area code/prefix search
Baltimore, MD
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| NPA-NXX |
BLOCK |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 667-867
| 5 |
BLTQMD013MD |
939H COMMIO, LLC |
238 |
|
2017-08-11 |
|
| 667-867
| 6 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2018-10-23 |
|
| 667-867
| 7 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2018-10-23 |
|
| 667-867
| 8 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2018-10-23 |
|
| 667-867
| 9 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2018-10-23 |
|
| 667-888
| A |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
|
|
| 667-888
| 0 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2015-07-27 |
|
| 667-888
| 1 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2015-07-27 |
|
| 667-888
| 2 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2015-07-27 |
|
| 667-888
| 3 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2015-07-27 |
|
| 667-888
| 4 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2015-07-27 |
|
| 667-888
| 5 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2015-07-27 |
|
| 667-888
| 6 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2015-07-27 |
|
| 667-888
| 7 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2015-07-27 |
|
| 667-888
| 8 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2014-09-26 |
|
| 667-888
| 9 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2015-07-27 |
|
| 667-895
| A |
BLTMMDCHXMX |
506J TWILIO INTERNATIONAL, INC. |
238 |
|
|
|
| 667-895
| 0 |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2021-09-06 |
|
| 667-895
| 1 |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2021-09-03 |
|
| 667-895
| 2 |
BLTMMDCHXUX |
624H ONVOY SPECTRUM, LLC |
238 |
|
2021-11-12 |
|
| 667-895
| 3 |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2021-03-19 |
|
| 667-895
| 4 |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2021-03-19 |
|
| 667-895
| 5 |
BLTMMDCHXNX |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
238 |
|
2021-07-12 |
|
| 667-895
| 6 |
BLTMMDCHCMD |
7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD |
238 |
|
2020-12-14 |
|
| 667-895
| 7 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2021-09-23 |
|
| 667-895
| 8 |
BLTMMDCHXMX |
506J TWILIO INTERNATIONAL, INC. |
238 |
|
2020-12-13 |
|
| 667-895
| 9 |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2021-09-03 |
|
| 667-899
| A |
BLTQMD01AMD |
965H FRACTEL, LLC |
238 |
|
|
|
| 667-899
| 0 |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2022-02-24 |
|
| 667-899
| 1 |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2022-02-24 |
|
| 667-899
| 2 |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2022-02-24 |
|
| 667-899
| 3 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2022-05-15 |
|
| 667-899
| 4 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2022-05-22 |
|
| 667-899
| 5 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2022-11-08 |
|
| 667-899
| 6 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2022-11-08 |
|
| 667-899
| 7 |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2022-02-24 |
|
| 667-899
| 8 |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2022-02-24 |
|
| 667-899
| 9 |
BLTQMD01AMD |
965H FRACTEL, LLC |
238 |
|
2021-12-26 |
|
| 667-900
| A |
BLTQMD018MD |
145J TERRA NOVA TELECOM INC. |
238 |
|
|
|
| 667-900
| 0 |
|
145J TERRA NOVA TELECOM INC. |
238 |
|
2019-04-21 |
|
| 667-900
| 1 |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2019-11-22 |
|
| 667-900
| 2 |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2019-11-22 |
|
| 667-900
| 3 |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2019-11-22 |
|
| 667-900
| 4 |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2019-11-22 |
|
| 667-900
| 5 |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2019-11-22 |
|
| 667-900
| 6 |
BLTQMD01DS0 |
568G PEERLESS NETWORK OF MARYLAND, LLC |
238 |
|
2020-04-15 |
|
| 667-900
| 7 |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2020-07-24 |
|
| 667-900
| 8 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2020-09-28 |
|
| 667-900
| 9 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2020-09-28 |
|
| 667-910
| A |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
|
|
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Last updated: Tue, 29 Sep 2026 03:00:13 UTC
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