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 |
| 240-840
| A |
Frederick |
MD |
FRDRMDFRXPX |
624H ONVOY SPECTRUM, LLC |
240 |
|
|
|
| 240-840
| 0 |
Frederick |
MD |
FRDRMDFRKMD |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
240 |
|
2018-09-20 |
|
| 240-840
| 1 |
Frederick |
MD |
MNRVMDMOXFX |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
240 |
|
2018-09-25 |
|
| 240-840
| 2 |
Frederick |
MD |
FRDRMDFRIMD |
551G NUSO, LLC |
240 |
|
2018-11-07 |
|
| 240-840
| 3 |
Frederick |
MD |
FRDRMDFRIMD |
551G NUSO, LLC |
240 |
|
2018-11-07 |
|
| 240-840
| 4 |
Frederick |
MD |
FRDRMDFRIMD |
551G NUSO, LLC |
240 |
|
2018-11-07 |
|
| 240-840
| 5 |
Frederick |
MD |
FRDRMDFRIMD |
551G NUSO, LLC |
240 |
|
2018-11-07 |
|
| 240-840
| 6 |
Frederick |
MD |
FRDRMDFRKMD |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
240 |
|
2018-10-22 |
|
| 240-840
| 7 |
Frederick |
MD |
FRDRMDFRKMD |
5562 METROPCS, INC. |
240 |
|
2019-07-11 |
|
| 240-840
| 8 |
Frederick |
MD |
FRDRMDFRXPX |
624H ONVOY SPECTRUM, LLC |
240 |
|
2018-07-30 |
|
| 240-840
| 9 |
Frederick |
MD |
FRDRMDFRIMD |
551G NUSO, LLC |
240 |
|
2018-10-14 |
|
| 240-841
| A |
Laurel (Baltimore LATA) |
MD |
BLTMMDCHXNX |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
238 |
|
|
|
| 240-841
| 0 |
Laurel (Baltimore LATA) |
MD |
BLTMMDCHXNX |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
238 |
|
|
|
| 240-841
| 1 |
Laurel (Baltimore LATA) |
MD |
BLTOMDKHBMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2011-10-02 |
|
| 240-841
| 2 |
Laurel (Baltimore LATA) |
MD |
BLTMMDCHXNX |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
238 |
|
|
|
| 240-841
| 3 |
Laurel (Baltimore LATA) |
MD |
BLTOMDKHBMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2011-10-02 |
|
| 240-841
| 4 |
Laurel (Baltimore LATA) |
MD |
BLTOMDKHBMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2011-10-02 |
|
| 240-841
| 5 |
Laurel (Baltimore LATA) |
MD |
BLTOMDKHBMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2011-10-02 |
|
| 240-841
| 6 |
Laurel (Baltimore LATA) |
MD |
BLTOMDKHBMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2014-09-01 |
|
| 240-841
| 7 |
Laurel (Baltimore LATA) |
MD |
|
829J PAETEC ITEL, LLC |
238 |
|
2010-07-01 |
|
| 240-841
| 8 |
Laurel (Baltimore LATA) |
MD |
BLTOMDKHBMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2011-10-31 |
|
| 240-841
| 9 |
Laurel (Baltimore LATA) |
MD |
BLTOMDKHBMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2011-10-31 |
|
| 240-842
| A |
Washington Zone 14 (Baltimore LATA) |
MD |
BLTMMDCHXNX |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
238 |
|
|
|
| 240-842
| 0 |
Washington Zone 14 (Baltimore LATA) |
MD |
BLTMMDCHXNX |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
238 |
|
|
|
| 240-842
| 1 |
Washington Zone 14 (Baltimore LATA) |
MD |
BLTMMDCHXNX |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
238 |
|
|
|
| 240-842
| 2 |
Washington Zone 14 (Baltimore LATA) |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2019-04-30 |
|
| 240-842
| 3 |
Washington Zone 14 (Baltimore LATA) |
MD |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2011-12-09 |
|
| 240-842
| 4 |
Washington Zone 14 (Baltimore LATA) |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2019-04-30 |
|
| 240-842
| 5 |
Washington Zone 14 (Baltimore LATA) |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2012-08-26 |
|
| 240-842
| 6 |
Washington Zone 14 (Baltimore LATA) |
MD |
|
829J PAETEC ITEL, LLC |
238 |
|
2016-11-21 |
|
| 240-842
| 7 |
Washington Zone 14 (Baltimore LATA) |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2019-04-30 |
|
| 240-842
| 8 |
Washington Zone 14 (Baltimore LATA) |
MD |
BLTMMDCHX7X |
073H TELNYX LLC |
238 |
|
2017-04-26 |
|
| 240-842
| 9 |
Washington Zone 14 (Baltimore LATA) |
MD |
BLTMMDCHXNX |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
238 |
|
|
|
| 240-843
| A |
Washington Zone 13 (Baltimore LATA) |
MD |
BLTMMDCHXNX |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
238 |
|
|
|
| 240-843
| 1 |
Washington Zone 13 (Baltimore LATA) |
MD |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2021-07-12 |
|
| 240-843
| 2 |
Washington Zone 13 (Baltimore LATA) |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2019-05-01 |
|
| 240-843
| 3 |
Washington Zone 13 (Baltimore LATA) |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2019-05-01 |
|
| 240-843
| 4 |
Washington Zone 13 (Baltimore LATA) |
MD |
BLTMMDCHXNX |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
238 |
|
|
|
| 240-843
| 5 |
Washington Zone 13 (Baltimore LATA) |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2019-05-01 |
|
| 240-843
| 6 |
Washington Zone 13 (Baltimore LATA) |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2019-05-01 |
|
| 240-843
| 7 |
Washington Zone 13 (Baltimore LATA) |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2019-05-01 |
|
| 240-843
| 8 |
Washington Zone 13 (Baltimore LATA) |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2019-05-01 |
|
| 240-843
| 9 |
Washington Zone 13 (Baltimore LATA) |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2019-05-01 |
|
| 240-844
| A |
Ridge |
MD |
VINNVACBDS0 |
876D ONVOY, LLC - MD |
236 |
|
|
|
| 240-844
| 0 |
Ridge |
MD |
WASHDC127MD |
073H TELNYX LLC |
236 |
|
2024-02-04 |
|
| 240-844
| 1 |
Ridge |
MD |
WASHDCDP8MD |
071F BANDWIDTH.COM CLEC, LLC - MD |
236 |
|
2010-02-22 |
|
| 240-844
| 2 |
Ridge |
MD |
WASHDCDP8MD |
071F BANDWIDTH.COM CLEC, LLC - MD |
236 |
|
2010-11-18 |
|
| 240-844
| 3 |
Ridge |
MD |
VINNVACBDS0 |
876D ONVOY, LLC - MD |
236 |
|
2012-10-07 |
|
| 240-844
| 4 |
Ridge |
MD |
VINNVACBDS0 |
876D ONVOY, LLC - MD |
236 |
|
|
|
| 240-844
| 5 |
Ridge |
MD |
VINNVACBDS0 |
876D ONVOY, LLC - MD |
236 |
|
2005-08-15 |
|
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Last updated: Wed, 04 Mar 2026 03:00:52 UTC
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