Local Calling Guide
Area code/prefix search
Washington Zone 2, MD
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| NPA-NXX |
BLOCK |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 301-409
| 3 |
|
876D ONVOY, LLC - MD |
236 |
|
2022-12-12 |
|
| 301-409
| 4 |
|
876D ONVOY, LLC - MD |
236 |
|
2022-12-12 |
|
| 301-409
| 5 |
|
876D ONVOY, LLC - MD |
236 |
|
2022-12-12 |
|
| 301-409
| 6 |
|
876D ONVOY, LLC - MD |
236 |
|
2022-12-12 |
|
| 301-409
| 7 |
|
624H ONVOY SPECTRUM, LLC |
236 |
|
2022-03-10 |
|
| 301-409
| 8 |
|
624H ONVOY SPECTRUM, LLC |
236 |
|
2022-03-10 |
|
| 301-409
| 9 |
|
624H ONVOY SPECTRUM, LLC |
236 |
|
2022-03-10 |
|
| 301-412
| A |
BTVLMD18GT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
|
|
| 301-435
| A |
BTHSMDRPDS0 |
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-451
| A |
BTHSMDRPDS0 |
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-469
| A |
BTHSMDBDDS0 |
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-480
| A |
BTHSMDRPDS0 |
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-492
| A |
CHCHMDBEDS0 |
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-493
| A |
BTHSMDWWDS0 |
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-496
| A |
BTHSMDRPDS0 |
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-500
| A |
WASKDCFNPS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
|
|
| 301-500
| 0 |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
236 |
|
2011-07-31 |
|
| 301-500
| 1 |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
2011-05-13 |
|
| 301-500
| 2 |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
2011-04-18 |
|
| 301-500
| 3 |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
2011-05-13 |
|
| 301-500
| 4 |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2010-11-01 |
|
| 301-500
| 5 |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2010-11-01 |
|
| 301-500
| 6 |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2010-11-01 |
|
| 301-500
| 7 |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2010-11-01 |
|
| 301-500
| 8 |
|
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
236 |
|
2011-08-01 |
|
| 301-500
| 9 |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2010-11-01 |
|
| 301-503
| A |
BTVLMD18GT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
|
|
| 301-530
| A |
BTHSMDWWDS0 |
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-538
| A |
BTVLMD18GT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
|
|
| 301-547
| A |
WASHDCDTDS1 |
7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
236 |
|
|
|
| 301-547
| 0 |
|
7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
236 |
|
|
|
| 301-547
| 1 |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2008-03-11 |
|
| 301-547
| 2 |
|
7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
236 |
|
|
|
| 301-547
| 3 |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
236 |
|
2006-06-04 |
|
| 301-547
| 4 |
|
7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
236 |
|
|
|
| 301-547
| 5 |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2007-01-11 |
|
| 301-547
| 6 |
|
551G NUSO, LLC |
236 |
|
2016-08-31 |
|
| 301-547
| 7 |
|
876D ONVOY, LLC - MD |
236 |
|
2020-12-03 |
|
| 301-547
| 8 |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
2014-02-21 |
|
| 301-547
| 9 |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2007-02-08 |
|
| 301-554
| A |
SLSPMDSSX6X |
6630 USA MOBILITY WIRELESS, INC. |
236 |
|
|
|
| 301-564
| A |
BTHSMDWWDS0 |
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-571
| A |
BTHSMDWWDS0 |
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-581
| A |
BTHSMDWWDS0 |
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-594
| A |
BTHSMDRPDS0 |
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-633
| A |
BTVLMD18GT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
|
|
| 301-634
| A |
WASHDCTTDS0 |
7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
236 |
|
|
|
| 301-642
| A |
BTVLMD18GT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
|
|
| 301-646
| A |
BTVLMD18GT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
|
|
| 301-648
| A |
BTVLMD18GT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
|
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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