Local Calling Guide
Area code/prefix search
Baltimore, MD
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| NPA-NXX |
BLOCK |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 667-677
| A |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
|
|
| 667-677
| 0 |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2016-02-06 |
|
| 667-677
| 1 |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2016-02-06 |
|
| 667-677
| 2 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2019-04-12 |
|
| 667-677
| 3 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2019-04-12 |
|
| 667-677
| 4 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2019-04-12 |
|
| 667-677
| 5 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2015-06-09 |
|
| 667-677
| 6 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2015-06-09 |
|
| 667-677
| 7 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2015-06-09 |
|
| 667-677
| 8 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2015-06-09 |
|
| 667-677
| 9 |
BLTQMD01DS0 |
568G PEERLESS NETWORK OF MARYLAND, LLC |
238 |
|
2016-11-05 |
|
| 667-770
| A |
BLTMMD915MD |
691H AIRUS, INC. - MD |
238 |
|
|
|
| 667-770
| 0 |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2015-11-09 |
|
| 667-770
| 1 |
BLTMMD915MD |
691H AIRUS, INC. - MD |
238 |
|
2015-09-21 |
|
| 667-770
| 2 |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2015-11-09 |
|
| 667-770
| 3 |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2015-11-09 |
|
| 667-770
| 4 |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2015-11-09 |
|
| 667-770
| 5 |
BLTMMDCHXVX |
321J HD CARRIER LLC |
238 |
|
2020-05-02 |
|
| 667-770
| 6 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2019-06-13 |
|
| 667-770
| 7 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2019-06-13 |
|
| 667-770
| 8 |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2015-11-09 |
|
| 667-770
| 9 |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2015-11-09 |
|
| 667-771
| A |
BLTMMDCHYMD |
530H WIDE VOICE, LLC - MD |
238 |
|
|
|
| 667-771
| 0 |
BLTMMDCHPMD |
820C INTRADO COMMUNICATIONS, LLC |
238 |
|
2016-08-20 |
|
| 667-771
| 1 |
BLTMMDCHYMD |
530H WIDE VOICE, LLC - MD |
238 |
|
2016-02-04 |
|
| 667-771
| 2 |
BLTMMDCHDMD |
551G NUSO, LLC |
238 |
|
2016-08-31 |
|
| 667-771
| 3 |
BLTMMDCHDMD |
551G NUSO, LLC |
238 |
|
2016-08-31 |
|
| 667-771
| 4 |
BLTMMDCHDMD |
551G NUSO, LLC |
238 |
|
2016-08-31 |
|
| 667-771
| 5 |
BLTMMDCHDMD |
551G NUSO, LLC |
238 |
|
2016-08-31 |
|
| 667-771
| 6 |
BLTMMDCHDMD |
551G NUSO, LLC |
238 |
|
2016-08-31 |
|
| 667-771
| 7 |
BLTQMD01DS0 |
568G PEERLESS NETWORK OF MARYLAND, LLC |
238 |
|
2016-11-05 |
|
| 667-771
| 8 |
BLTQMD01DS0 |
568G PEERLESS NETWORK OF MARYLAND, LLC |
238 |
|
2016-11-05 |
|
| 667-771
| 9 |
|
515J IP HORIZON LLC |
238 |
|
2016-05-31 |
|
| 667-776
| A |
BLTMMDCHXVX |
321J HD CARRIER LLC |
238 |
|
|
|
| 667-776
| 0 |
BLTQMD01DS0 |
568G PEERLESS NETWORK OF MARYLAND, LLC |
238 |
|
2019-12-28 |
|
| 667-776
| 1 |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2020-04-08 |
|
| 667-776
| 2 |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2020-04-08 |
|
| 667-776
| 3 |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2020-04-08 |
|
| 667-776
| 4 |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2020-04-08 |
|
| 667-776
| 5 |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2020-04-08 |
|
| 667-776
| 6 |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2020-04-08 |
|
| 667-776
| 7 |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2020-04-08 |
|
| 667-776
| 8 |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2020-04-08 |
|
| 667-776
| 9 |
BLTMMDCHXVX |
321J HD CARRIER LLC |
238 |
|
2019-11-15 |
|
| 667-867
| A |
BLTQMD013MD |
939H COMMIO, LLC |
238 |
|
|
|
| 667-867
| 0 |
BLTMMDCHDMD |
551G NUSO, LLC |
238 |
|
2018-10-14 |
|
| 667-867
| 1 |
BLTMMDCHDMD |
551G NUSO, LLC |
238 |
|
2018-10-14 |
|
| 667-867
| 2 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2018-10-23 |
|
| 667-867
| 3 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2018-10-23 |
|
| 667-867
| 4 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2018-10-23 |
|
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Last updated: Tue, 29 Sep 2026 03:00:13 UTC
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