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 |
| 240-739
| A |
Frederick |
MD |
CMLDMDCMWMD |
515J IP HORIZON LLC |
240 |
|
|
|
| 240-739
| 0 |
Frederick |
MD |
|
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
240 |
|
2020-11-24 |
|
| 240-739
| 1 |
Frederick |
MD |
|
515J IP HORIZON LLC |
240 |
|
2020-11-06 |
|
| 240-739
| 2 |
Frederick |
MD |
|
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
240 |
|
2020-11-24 |
|
| 240-739
| 3 |
Frederick |
MD |
|
318J COMCAST IP PHONE, LLC |
240 |
|
2021-03-14 |
|
| 240-739
| 4 |
Frederick |
MD |
|
5562 METROPCS, INC. |
240 |
|
2020-12-31 |
|
| 240-739
| 5 |
Frederick |
MD |
|
836G SHENTEL COMMUNICATIONS, LLC. - MD |
240 |
|
2021-07-23 |
|
| 240-739
| 6 |
Frederick |
MD |
|
876D ONVOY, LLC - MD |
240 |
|
2021-08-16 |
|
| 240-739
| 7 |
Frederick |
MD |
|
876D ONVOY, LLC - MD |
240 |
|
2021-08-16 |
|
| 240-739
| 8 |
Frederick |
MD |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
240 |
|
2021-08-20 |
|
| 240-739
| 9 |
Frederick |
MD |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
240 |
|
2021-08-20 |
|
| 240-740
| A |
Washington Zone 10 |
MD |
VINNVACB1MD |
361H ATLANTECH ONLINE, INC. - MD |
236 |
|
|
|
| 240-740
| 0 |
Washington Zone 10 |
MD |
|
361H ATLANTECH ONLINE, INC. - MD |
236 |
|
2015-11-01 |
|
| 240-740
| 1 |
Washington Zone 10 |
MD |
|
361H ATLANTECH ONLINE, INC. - MD |
236 |
|
2015-11-01 |
|
| 240-740
| 2 |
Washington Zone 10 |
MD |
|
361H ATLANTECH ONLINE, INC. - MD |
236 |
|
2015-11-01 |
|
| 240-740
| 3 |
Washington Zone 10 |
MD |
|
361H ATLANTECH ONLINE, INC. - MD |
236 |
|
2015-11-01 |
|
| 240-740
| 4 |
Washington Zone 10 |
MD |
|
361H ATLANTECH ONLINE, INC. - MD |
236 |
|
2015-11-01 |
|
| 240-740
| 5 |
Washington Zone 10 |
MD |
|
361H ATLANTECH ONLINE, INC. - MD |
236 |
|
2015-11-01 |
|
| 240-740
| 6 |
Washington Zone 10 |
MD |
|
361H ATLANTECH ONLINE, INC. - MD |
236 |
|
2015-11-01 |
|
| 240-740
| 7 |
Washington Zone 10 |
MD |
|
361H ATLANTECH ONLINE, INC. - MD |
236 |
|
2015-11-01 |
|
| 240-740
| 8 |
Washington Zone 10 |
MD |
|
361H ATLANTECH ONLINE, INC. - MD |
236 |
|
2015-11-01 |
|
| 240-740
| 9 |
Washington Zone 10 |
MD |
|
361H ATLANTECH ONLINE, INC. - MD |
236 |
|
2015-11-01 |
|
| 240-741
| A |
Frederick |
MD |
CMLDMDCMYMD |
996H AIRESPRING, INC. |
240 |
|
|
|
| 240-741
| 0 |
Frederick |
MD |
|
996H AIRESPRING, INC. |
240 |
|
2020-11-15 |
|
| 240-741
| 1 |
Frederick |
MD |
|
5562 METROPCS, INC. |
240 |
|
2021-04-22 |
|
| 240-741
| 2 |
Frederick |
MD |
|
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
240 |
|
2021-07-02 |
|
| 240-741
| 3 |
Frederick |
MD |
|
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
240 |
|
2021-07-02 |
|
| 240-741
| 4 |
Frederick |
MD |
|
624H ONVOY SPECTRUM, LLC |
240 |
|
2021-05-24 |
|
| 240-741
| 5 |
Frederick |
MD |
|
624H ONVOY SPECTRUM, LLC |
240 |
|
2021-02-23 |
|
| 240-741
| 6 |
Frederick |
MD |
|
624H ONVOY SPECTRUM, LLC |
240 |
|
2021-02-23 |
|
| 240-741
| 7 |
Frederick |
MD |
|
624H ONVOY SPECTRUM, LLC |
240 |
|
2021-02-23 |
|
| 240-741
| 8 |
Frederick |
MD |
|
624H ONVOY SPECTRUM, LLC |
240 |
|
2021-02-23 |
|
| 240-741
| 9 |
Frederick |
MD |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
240 |
|
2021-04-08 |
|
| 240-742
| A |
Washington Zone 14 (Baltimore LATA) |
MD |
BLTMMDCHXKX |
478J NUSO, LLC |
238 |
|
|
|
| 240-742
| 0 |
Washington Zone 14 (Baltimore LATA) |
MD |
|
568G PEERLESS NETWORK OF MARYLAND, LLC |
238 |
|
2023-10-20 |
|
| 240-742
| 1 |
Washington Zone 14 (Baltimore LATA) |
MD |
|
478J NUSO, LLC |
238 |
|
2021-01-21 |
|
| 240-742
| 2 |
Washington Zone 14 (Baltimore LATA) |
MD |
|
876D ONVOY, LLC - MD |
238 |
|
2021-03-04 |
|
| 240-742
| 3 |
Washington Zone 14 (Baltimore LATA) |
MD |
|
876D ONVOY, LLC - MD |
238 |
|
2021-07-12 |
|
| 240-742
| 4 |
Washington Zone 14 (Baltimore LATA) |
MD |
|
876D ONVOY, LLC - MD |
238 |
|
2022-10-16 |
|
| 240-742
| 5 |
Washington Zone 14 (Baltimore LATA) |
MD |
|
624H ONVOY SPECTRUM, LLC |
238 |
|
2022-03-03 |
|
| 240-742
| 6 |
Washington Zone 14 (Baltimore LATA) |
MD |
|
624H ONVOY SPECTRUM, LLC |
238 |
|
2021-05-23 |
|
| 240-742
| 7 |
Washington Zone 14 (Baltimore LATA) |
MD |
|
7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD |
238 |
|
2024-12-23 |
|
| 240-742
| 8 |
Washington Zone 14 (Baltimore LATA) |
MD |
|
624H ONVOY SPECTRUM, LLC |
238 |
|
2022-03-03 |
|
| 240-742
| 9 |
Washington Zone 14 (Baltimore LATA) |
MD |
|
568G PEERLESS NETWORK OF MARYLAND, LLC |
238 |
|
2021-12-02 |
|
| 240-743
| A |
Washington Zone 2 |
MD |
WASKDCFNAMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
236 |
|
|
|
| 240-743
| 0 |
Washington Zone 2 |
MD |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2015-08-09 |
|
| 240-743
| 1 |
Washington Zone 2 |
MD |
|
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
236 |
|
2014-07-01 |
|
| 240-743
| 2 |
Washington Zone 2 |
MD |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
236 |
|
2014-05-11 |
|
| 240-743
| 3 |
Washington Zone 2 |
MD |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
236 |
|
2007-08-27 |
|
| 240-743
| 4 |
Washington Zone 2 |
MD |
|
318J COMCAST IP PHONE, LLC |
236 |
|
2007-09-20 |
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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