Local Calling Guide
Area code/prefix search
Fork, MD
<< 1 2 3 4
| NPA-NXX |
BLOCK |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 443-421
| A |
CLMAMDORGT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
|
|
| 443-606
| A |
|
829J PAETEC ITEL, LLC |
238 |
|
2025-04-01 |
|
| 443-606
| 0 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2014-10-18 |
|
| 443-606
| 1 |
|
829J PAETEC ITEL, LLC |
238 |
|
|
|
| 443-606
| 2 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2014-10-18 |
|
| 443-606
| 3 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2014-10-18 |
|
| 443-606
| 4 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2014-10-18 |
|
| 443-606
| 6 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2015-11-27 |
|
| 443-606
| 8 |
BLTMMDCHX7X |
073H TELNYX LLC |
238 |
|
2017-04-25 |
|
| 443-606
| 9 |
|
515J IP HORIZON LLC |
238 |
|
2015-03-21 |
|
| 443-625
| A |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
|
|
| 443-625
| 0 |
|
876D ONVOY, LLC - MD |
238 |
|
2025-05-03 |
|
| 443-625
| 1 |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2001-10-17 |
|
| 443-625
| 2 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2015-06-13 |
|
| 443-625
| 3 |
BLTOMDKHDS0 |
7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD |
238 |
|
2008-10-01 |
|
| 443-625
| 4 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2015-06-13 |
|
| 443-625
| 5 |
|
829J PAETEC ITEL, LLC |
238 |
|
2002-11-16 |
|
| 443-625
| 6 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2011-09-02 |
|
| 443-625
| 7 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2011-09-02 |
|
| 443-625
| 8 |
CLMAMDORGT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2004-04-09 |
|
| 443-625
| 9 |
CLMAMDORGT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2004-02-18 |
|
| 667-283
| A |
BLTMMDCHXAX |
7421 AT&T - LOCAL |
238 |
|
|
|
| 667-283
| 0 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2021-01-08 |
|
| 667-283
| 1 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2021-04-09 |
|
| 667-283
| 2 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2023-08-10 |
|
| 667-283
| 3 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2021-07-11 |
|
| 667-283
| 4 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2021-07-11 |
|
| 667-283
| 5 |
BLTQMD01BMD |
516J TON80 COMMUNICATIONS, LLC |
238 |
|
2022-03-29 |
|
| 667-283
| 6 |
BLTMMDCHXUX |
624H ONVOY SPECTRUM, LLC |
238 |
|
2022-01-20 |
|
| 667-283
| 7 |
BLTMMDCHXUX |
624H ONVOY SPECTRUM, LLC |
238 |
|
2022-01-20 |
|
| 667-283
| 8 |
BLTQMD01DS0 |
568G PEERLESS NETWORK OF MARYLAND, LLC |
238 |
|
2021-02-26 |
|
| 667-283
| 9 |
BLTMMDCHXAX |
7421 AT&T - LOCAL |
238 |
|
2020-08-24 |
|
| 667-451
| A |
CLMAMDORGT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
|
|
| 667-451
| 0 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2024-04-19 |
|
| 667-451
| 1 |
|
876D ONVOY, LLC - MD |
238 |
|
2025-07-20 |
|
| 667-451
| 7 |
BLTQMD01DS0 |
568G PEERLESS NETWORK OF MARYLAND, LLC |
238 |
|
2024-06-20 |
|
| 667-451
| 8 |
CLMAMDORGT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2024-01-12 |
|
| 667-451
| 9 |
CLMAMDORGT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2023-11-13 |
|
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Last updated: Tue, 31 Mar 2026 13:56:49 UTC
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