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 |
| 240-562
| 3 |
Gaithersburg |
MD |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
2015-07-27 |
|
| 240-562
| 4 |
Gaithersburg |
MD |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
2015-07-27 |
|
| 240-562
| 5 |
Gaithersburg |
MD |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
2015-07-27 |
|
| 240-562
| 6 |
Gaithersburg |
MD |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
2015-07-27 |
|
| 240-562
| 7 |
Gaithersburg |
MD |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
2015-07-27 |
|
| 240-562
| 8 |
Gaithersburg |
MD |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
2015-07-27 |
|
| 240-562
| 9 |
Gaithersburg |
MD |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
2015-07-27 |
|
| 240-563
| A |
Washington Zone 5 |
MD |
VINNVACBDS0 |
876D ONVOY, LLC - MD |
236 |
|
|
|
| 240-563
| 0 |
Washington Zone 5 |
MD |
VINNVACBDS0 |
876D ONVOY, LLC - MD |
236 |
|
2017-08-19 |
|
| 240-563
| 1 |
Washington Zone 5 |
MD |
ARTNVAARXDY |
318J COMCAST IP PHONE, LLC |
236 |
|
2017-08-24 |
|
| 240-563
| 2 |
Washington Zone 5 |
MD |
WASKDCFNAMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
236 |
|
2017-08-24 |
|
| 240-563
| 3 |
Washington Zone 5 |
MD |
WASKDCFNAMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
236 |
|
2017-08-24 |
|
| 240-563
| 4 |
Washington Zone 5 |
MD |
SLSPMD91DS0 |
568G PEERLESS NETWORK OF MARYLAND, LLC |
236 |
|
2018-11-20 |
|
| 240-563
| 5 |
Washington Zone 5 |
MD |
WASHDC126MD |
964H BARR TELL USA, INC. |
236 |
|
2018-05-08 |
|
| 240-563
| 6 |
Washington Zone 5 |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2019-04-29 |
|
| 240-563
| 7 |
Washington Zone 5 |
MD |
SLSPMD91DS0 |
568G PEERLESS NETWORK OF MARYLAND, LLC |
236 |
|
2018-06-24 |
|
| 240-563
| 8 |
Washington Zone 5 |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2019-04-29 |
|
| 240-563
| 9 |
Washington Zone 5 |
MD |
VINNVACBDS0 |
876D ONVOY, LLC - MD |
236 |
|
2019-05-17 |
|
| 240-564
| A |
Laurel |
MD |
BTVLMD12CMA |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
|
|
| 240-564
| 0 |
Laurel |
MD |
BTVLMD18GT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2019-02-24 |
|
| 240-564
| 1 |
Laurel |
MD |
BTVLMD18GT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2019-04-27 |
|
| 240-564
| 2 |
Laurel |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2019-05-01 |
|
| 240-564
| 3 |
Laurel |
MD |
BTVLMD18GT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2019-06-03 |
|
| 240-564
| 4 |
Laurel |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2019-05-01 |
|
| 240-564
| 5 |
Laurel |
MD |
BTVLMD18GT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2019-06-03 |
|
| 240-564
| 6 |
Laurel |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2019-05-01 |
|
| 240-564
| 7 |
Laurel |
MD |
BTVLMD12CMA |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2019-10-07 |
|
| 240-564
| 8 |
Laurel |
MD |
BTVLMD12CMA |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2019-11-04 |
|
| 240-564
| 9 |
Laurel |
MD |
BTVLMD12CMA |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2019-02-23 |
|
| 240-565
| A |
Laurel (Baltimore LATA) |
MD |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
|
|
| 240-565
| 0 |
Laurel (Baltimore LATA) |
MD |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2006-08-11 |
|
| 240-565
| 1 |
Laurel (Baltimore LATA) |
MD |
BLTOMDKHBMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2007-12-06 |
|
| 240-565
| 2 |
Laurel (Baltimore LATA) |
MD |
BLTOMDKHBMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2008-03-03 |
|
| 240-565
| 3 |
Laurel (Baltimore LATA) |
MD |
BLTOMDKHBMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2006-09-20 |
|
| 240-565
| 4 |
Laurel (Baltimore LATA) |
MD |
BLTOMDKHBMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2007-06-01 |
|
| 240-565
| 5 |
Laurel (Baltimore LATA) |
MD |
BLTOMDKHBMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2006-04-01 |
|
| 240-565
| 6 |
Laurel (Baltimore LATA) |
MD |
BLTOMDKHDS0 |
7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD |
238 |
|
2007-03-01 |
|
| 240-565
| 7 |
Laurel (Baltimore LATA) |
MD |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2006-02-13 |
|
| 240-565
| 8 |
Laurel (Baltimore LATA) |
MD |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2007-01-15 |
|
| 240-565
| 9 |
Laurel (Baltimore LATA) |
MD |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2006-02-13 |
|
| 240-566
| A |
Frederick |
MD |
FRDRMDFRDS1 |
9212 VERIZON MARYLAND, INC. |
240 |
|
|
|
| 240-566
| 0 |
Frederick |
MD |
FRDRMDFRDS1 |
9212 VERIZON MARYLAND, INC. |
240 |
|
2002-07-26 |
|
| 240-566
| 1 |
Frederick |
MD |
|
829J PAETEC ITEL, LLC |
240 |
|
2006-02-10 |
|
| 240-566
| 2 |
Frederick |
MD |
MNRVMDMOXFX |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
240 |
|
2006-09-01 |
|
| 240-566
| 3 |
Frederick |
MD |
FRDRMDFRXMD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
240 |
|
2002-10-01 |
|
| 240-566
| 4 |
Frederick |
MD |
FRDRMDFRXMD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
240 |
|
2002-10-01 |
|
| 240-566
| 5 |
Frederick |
MD |
FRDRMDFRXMD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
240 |
|
2006-09-05 |
|
| 240-566
| 6 |
Frederick |
MD |
FRDRMDFRXSX |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
240 |
|
2008-06-05 |
|
| 240-566
| 7 |
Frederick |
MD |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
240 |
|
2008-09-01 |
|
| 240-566
| 8 |
Frederick |
MD |
FRDRMDFRKMD |
5562 METROPCS, INC. |
240 |
|
2006-06-02 |
|
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Last updated: Sat, 02 May 2026 12:20:53 UTC
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