Local Calling Guide
Area code/prefix search
NPA: 301
[Rate centres in NPA 301]
[Dial plan for NPA 301]
<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 >>
NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
301-820
| 9 |
Gaithersburg |
MD |
WASHDCSWMMD |
624H ONVOY SPECTRUM, LLC |
236 |
|
2022-01-07 |
|
301-821
| A |
Laurel |
MD |
WASHDCTTDS0 |
7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
236 |
|
|
|
301-821
| 0 |
Laurel |
MD |
WASKDCFNAMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
236 |
|
2006-01-02 |
|
301-821
| 1 |
Laurel |
MD |
WASKDCFNAMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
236 |
|
2006-01-02 |
|
301-821
| 2 |
Laurel |
MD |
WASKDCFNAMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
236 |
|
2006-08-07 |
|
301-821
| 3 |
Laurel |
MD |
WASKDCFNAMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
236 |
|
2005-09-20 |
|
301-821
| 4 |
Laurel |
MD |
WASHDCTTDS0 |
7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
236 |
|
|
|
301-821
| 5 |
Laurel |
MD |
WASKDCFNAMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
236 |
|
2005-09-20 |
|
301-821
| 6 |
Laurel |
MD |
WASKDCFNAMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
236 |
|
2006-01-02 |
|
301-821
| 7 |
Laurel |
MD |
WASKDCFNAMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
236 |
|
2006-01-02 |
|
301-821
| 8 |
Laurel |
MD |
LARLMDLRDS0 |
9212 VERIZON MARYLAND, INC. |
236 |
|
2005-11-17 |
|
301-821
| 9 |
Laurel |
MD |
WASHDCSWMMD |
624H ONVOY SPECTRUM, LLC |
236 |
|
2021-11-08 |
|
301-822
| A |
Washington Zone 11 |
MD |
WASKDCFNPS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
|
|
301-822
| 0 |
Washington Zone 11 |
MD |
WASHDCINDS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
2016-09-01 |
|
301-822
| 1 |
Washington Zone 11 |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2018-10-24 |
|
301-822
| 2 |
Washington Zone 11 |
MD |
VINNVACBDS0 |
876D ONVOY, LLC - MD |
236 |
|
2016-02-09 |
|
301-822
| 3 |
Washington Zone 11 |
MD |
WASHDCINDS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
2016-09-01 |
|
301-822
| 4 |
Washington Zone 11 |
MD |
ARTNVAARXDY |
318J COMCAST IP PHONE, LLC |
236 |
|
2013-10-03 |
|
301-822
| 5 |
Washington Zone 11 |
MD |
WASHDCINDS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
2016-09-01 |
|
301-822
| 6 |
Washington Zone 11 |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2018-10-24 |
|
301-822
| 7 |
Washington Zone 11 |
MD |
WASHDCINDS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
2016-09-01 |
|
301-822
| 8 |
Washington Zone 11 |
MD |
WASHDCINDS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
2016-09-01 |
|
301-822
| 9 |
Washington Zone 11 |
MD |
SLSPMD91DS0 |
568G PEERLESS NETWORK OF MARYLAND, LLC |
236 |
|
|
|
301-823
| A |
Washington Zone 13 |
MD |
WASHDCDTDS1 |
7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
236 |
|
|
|
301-823
| 2 |
Washington Zone 13 |
MD |
WASHDCDTDS1 |
7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
236 |
|
2008-10-10 |
|
301-823
| 3 |
Washington Zone 13 |
MD |
WASHDCMTX7X |
2697 CTC COMMUNICATIONS CORP. - MD |
236 |
|
2012-11-21 |
|
301-823
| 4 |
Washington Zone 13 |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2018-06-16 |
|
301-823
| 5 |
Washington Zone 13 |
MD |
WASHDC125MD |
197D VONAGE AMERICA LLC |
236 |
|
2020-05-20 |
|
301-823
| 7 |
Washington Zone 13 |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2019-04-29 |
|
301-823
| 8 |
Washington Zone 13 |
MD |
LARLMDCCDS0 |
4492 VDL, INC. DBA GLOBAL TELECOM BROKERS - MD |
236 |
|
2004-04-06 |
|
301-823
| 9 |
Washington Zone 13 |
MD |
WASHDCSWMMD |
624H ONVOY SPECTRUM, LLC |
236 |
|
2021-11-08 |
|
301-824
| A |
Smithsburg |
MD |
SMBGMDSMRS0 |
9212 VERIZON MARYLAND, INC. |
240 |
|
|
|
301-824
| 0 |
Smithsburg |
MD |
FRDRMDFRXTX |
318J COMCAST IP PHONE, LLC |
240 |
|
2007-04-07 |
|
301-824
| 1 |
Smithsburg |
MD |
SMBGMDSMRS0 |
9212 VERIZON MARYLAND, INC. |
240 |
|
|
|
301-824
| 2 |
Smithsburg |
MD |
SMBGMDSMRS0 |
9212 VERIZON MARYLAND, INC. |
240 |
|
|
|
301-824
| 3 |
Smithsburg |
MD |
SMBGMDSMRS0 |
9212 VERIZON MARYLAND, INC. |
240 |
|
|
|
301-824
| 4 |
Smithsburg |
MD |
SMBGMDSMRS0 |
9212 VERIZON MARYLAND, INC. |
240 |
|
|
|
301-824
| 5 |
Smithsburg |
MD |
SMBGMDSMRS0 |
9212 VERIZON MARYLAND, INC. |
240 |
|
|
|
301-824
| 6 |
Smithsburg |
MD |
SMBGMDSMRS0 |
9212 VERIZON MARYLAND, INC. |
240 |
|
|
|
301-824
| 7 |
Smithsburg |
MD |
SMBGMDSMRS0 |
9212 VERIZON MARYLAND, INC. |
240 |
|
|
|
301-824
| 8 |
Smithsburg |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
240 |
|
2004-03-28 |
|
301-824
| 9 |
Smithsburg |
MD |
HGTWMDHGDMD |
071F BANDWIDTH.COM CLEC, LLC - MD |
240 |
|
2006-08-22 |
|
301-825
| A |
Washington Zone 10 |
MD |
WASHDCSWDS8 |
7421 AT&T - LOCAL |
236 |
|
|
|
301-825
| 0 |
Washington Zone 10 |
MD |
WASHDCSWDS8 |
7421 AT&T - LOCAL |
236 |
|
|
|
301-825
| 1 |
Washington Zone 10 |
MD |
BTVLMD127MD |
5562 METROPCS, INC. |
236 |
|
2013-08-01 |
|
301-825
| 2 |
Washington Zone 10 |
MD |
BTVLMD12CM9 |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2008-09-19 |
|
301-825
| 3 |
Washington Zone 10 |
MD |
BTVLMD12CM9 |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2008-09-19 |
|
301-825
| 4 |
Washington Zone 10 |
MD |
BTVLMD12CM9 |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2008-09-19 |
|
301-825
| 5 |
Washington Zone 10 |
MD |
MCLNVA23DS4 |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
236 |
|
2006-12-08 |
|
301-825
| 6 |
Washington Zone 10 |
MD |
BTVLMD12CM9 |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2008-09-19 |
|
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Last updated: Tue, 16 Apr 2024 01:38:01 UTC
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