Local Calling Guide
Area code/prefix search
NPA: 240
[Rate centres in NPA 240]
[Dial plan for NPA 240]
<< 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 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 >>
| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 240-586
| 2 |
Frederick |
MD |
FRDRMDFRKMD |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
240 |
|
2008-07-17 |
|
| 240-586
| 3 |
Frederick |
MD |
FRDRMDFRKMD |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
240 |
|
2007-04-12 |
|
| 240-586
| 4 |
Frederick |
MD |
FRDRMDFRKMD |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
240 |
|
2007-04-12 |
|
| 240-586
| 5 |
Frederick |
MD |
FRDRMDFRDS1 |
9212 VERIZON MARYLAND, INC. |
240 |
|
2007-01-21 |
|
| 240-586
| 6 |
Frederick |
MD |
FRDRMDFRDS1 |
9212 VERIZON MARYLAND, INC. |
240 |
|
2007-01-21 |
|
| 240-586
| 7 |
Frederick |
MD |
FRDRMDFRX7X |
7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD |
240 |
|
2007-01-21 |
|
| 240-586
| 8 |
Frederick |
MD |
FRDRMDFRX7X |
7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD |
240 |
|
2007-01-21 |
|
| 240-586
| 9 |
Frederick |
MD |
FRDRMDFRKMD |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
240 |
|
2007-04-12 |
|
| 240-587
| A |
Leonardtown |
MD |
WASKDCFNAMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
236 |
|
|
|
| 240-587
| 0 |
Leonardtown |
MD |
WASKDCFNAMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
236 |
|
2009-09-05 |
|
| 240-587
| 1 |
Leonardtown |
MD |
WASKDCFNAMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
236 |
|
2010-01-16 |
|
| 240-587
| 2 |
Leonardtown |
MD |
WASKDCFNAMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
236 |
|
2011-02-03 |
|
| 240-587
| 3 |
Leonardtown |
MD |
WASHDCDP8MD |
071F BANDWIDTH.COM CLEC, LLC - MD |
236 |
|
2011-02-26 |
|
| 240-587
| 4 |
Leonardtown |
MD |
WASKDCFNAMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
236 |
|
2014-02-01 |
|
| 240-587
| 5 |
Leonardtown |
MD |
WASHDCDP8MD |
071F BANDWIDTH.COM CLEC, LLC - MD |
236 |
|
2010-09-03 |
|
| 240-587
| 6 |
Leonardtown |
MD |
WASHDCDP8MD |
071F BANDWIDTH.COM CLEC, LLC - MD |
236 |
|
2010-10-28 |
|
| 240-587
| 7 |
Leonardtown |
MD |
WASHDCDP8MD |
071F BANDWIDTH.COM CLEC, LLC - MD |
236 |
|
2010-02-25 |
|
| 240-587
| 8 |
Leonardtown |
MD |
WASKDCFNAMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
236 |
|
2010-12-23 |
|
| 240-587
| 9 |
Leonardtown |
MD |
WASKDCFNAMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
236 |
|
2011-04-01 |
|
| 240-588
| A |
Grantsville |
MD |
FRDRMDFRXVX |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
240 |
|
|
|
| 240-588
| 0 |
Grantsville |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
240 |
|
2018-07-07 |
|
| 240-588
| 1 |
Grantsville |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
240 |
|
2018-07-07 |
|
| 240-588
| 2 |
Grantsville |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
240 |
|
2019-04-15 |
|
| 240-588
| 3 |
Grantsville |
MD |
FRDRMDFRXVX |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
240 |
|
2018-05-01 |
|
| 240-588
| 4 |
Grantsville |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
240 |
|
2019-03-31 |
|
| 240-588
| 5 |
Grantsville |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
240 |
|
2019-03-31 |
|
| 240-588
| 6 |
Grantsville |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
240 |
|
2019-03-31 |
|
| 240-588
| 7 |
Grantsville |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
240 |
|
2019-03-31 |
|
| 240-588
| 8 |
Grantsville |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
240 |
|
2018-07-07 |
|
| 240-588
| 9 |
Grantsville |
MD |
FRDRMDFRKMD |
5562 METROPCS, INC. |
240 |
|
2019-04-04 |
|
| 240-589
| A |
McCoole |
MD |
MNRVMDMOXFX |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
240 |
|
|
|
| 240-589
| 0 |
McCoole |
MD |
CMLDMDCMEMD |
876D ONVOY, LLC - MD |
240 |
|
2020-06-04 |
|
| 240-589
| 1 |
McCoole |
MD |
FRDRMDFRXPX |
624H ONVOY SPECTRUM, LLC |
240 |
|
2022-02-26 |
|
| 240-589
| 2 |
McCoole |
MD |
HGTWMD53BMD |
145J TERRA NOVA TELECOM INC. |
240 |
|
2024-02-10 |
|
| 240-589
| 3 |
McCoole |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
240 |
|
2019-05-14 |
|
| 240-589
| 4 |
McCoole |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
240 |
|
2019-05-14 |
|
| 240-589
| 5 |
McCoole |
MD |
CMLDMDCMEMD |
876D ONVOY, LLC - MD |
240 |
|
2020-01-06 |
|
| 240-589
| 6 |
McCoole |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
240 |
|
2019-05-14 |
|
| 240-589
| 7 |
McCoole |
MD |
CMLDMDCMEMD |
876D ONVOY, LLC - MD |
240 |
|
2020-01-06 |
|
| 240-589
| 8 |
McCoole |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
240 |
|
2019-05-14 |
|
| 240-589
| 9 |
McCoole |
MD |
MNRVMDMOXFX |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
240 |
|
2018-05-07 |
|
| 240-590
| A |
Washington Zone 12 |
MD |
BTVLMD12CMA |
5562 METROPCS, INC. |
236 |
|
|
|
| 240-590
| 0 |
Washington Zone 12 |
MD |
WASHDC126MD |
964H BARR TELL USA, INC. |
236 |
|
2018-06-01 |
|
| 240-590
| 1 |
Washington Zone 12 |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2018-07-06 |
|
| 240-590
| 2 |
Washington Zone 12 |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2018-07-06 |
|
| 240-590
| 3 |
Washington Zone 12 |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2018-07-06 |
|
| 240-590
| 4 |
Washington Zone 12 |
MD |
BTVLMD12CMA |
5562 METROPCS, INC. |
236 |
|
2019-08-03 |
|
| 240-590
| 5 |
Washington Zone 12 |
MD |
VINNVACBDS0 |
876D ONVOY, LLC - MD |
236 |
|
2021-09-24 |
|
| 240-590
| 6 |
Washington Zone 12 |
MD |
SLSPMD91DS0 |
568G PEERLESS NETWORK OF MARYLAND, LLC |
236 |
|
2020-02-26 |
|
| 240-590
| 7 |
Washington Zone 12 |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2019-07-30 |
|
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Last updated: Sat, 02 May 2026 12:20:53 UTC
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