Local Calling Guide
Area code/prefix search
NPA: 443
[Rate centres in NPA 443]
[Dial plan for NPA 443]
<< 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 >>
NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
443-580
| 0 |
Baltimore |
MD |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2011-10-27 |
|
443-580
| 1 |
Baltimore |
MD |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2011-10-27 |
|
443-580
| 2 |
Baltimore |
MD |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2011-10-27 |
|
443-580
| 3 |
Baltimore |
MD |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2011-10-27 |
|
443-580
| 4 |
Baltimore |
MD |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2011-10-27 |
|
443-580
| 5 |
Baltimore |
MD |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2011-10-27 |
|
443-580
| 6 |
Baltimore |
MD |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2024-04-13 |
|
443-580
| 7 |
Baltimore |
MD |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2011-10-27 |
|
443-580
| 8 |
Baltimore |
MD |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2011-10-27 |
|
443-580
| 9 |
Baltimore |
MD |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2011-10-27 |
|
443-581
| A |
Chase |
MD |
|
876D ONVOY, LLC - MD |
238 |
|
|
|
443-581
| 0 |
Chase |
MD |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2021-03-04 |
|
443-581
| 1 |
Chase |
MD |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2021-03-04 |
|
443-581
| 5 |
Chase |
MD |
BLTMMDCHXUX |
624H ONVOY SPECTRUM, LLC |
238 |
|
2021-02-24 |
|
443-581
| 6 |
Chase |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2019-07-30 |
|
443-581
| 7 |
Chase |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2019-07-30 |
|
443-581
| 8 |
Chase |
MD |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2019-07-06 |
|
443-581
| 9 |
Chase |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2019-04-30 |
|
443-582
| A |
Churchville |
MD |
BLTMMDCH14Z |
2697 CTC COMMUNICATIONS CORP. - MD |
238 |
|
|
|
443-582
| 0 |
Churchville |
MD |
BLTMMDCHX7X |
073H TELNYX LLC |
238 |
|
2017-04-26 |
|
443-582
| 1 |
Churchville |
MD |
BLTMMDCH14Z |
2697 CTC COMMUNICATIONS CORP. - MD |
238 |
|
|
|
443-582
| 2 |
Churchville |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2019-07-30 |
|
443-582
| 3 |
Churchville |
MD |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2017-05-29 |
|
443-582
| 4 |
Churchville |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2018-06-16 |
|
443-582
| 5 |
Churchville |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2018-06-16 |
|
443-582
| 6 |
Churchville |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2019-07-30 |
|
443-582
| 7 |
Churchville |
MD |
BLTMMDCHXUX |
624H ONVOY SPECTRUM, LLC |
238 |
|
2021-05-28 |
|
443-582
| 8 |
Churchville |
MD |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2018-07-28 |
|
443-582
| 9 |
Churchville |
MD |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2018-05-31 |
|
443-583
| A |
Columbia |
MD |
BLTMMDCH14Z |
2697 CTC COMMUNICATIONS CORP. - MD |
238 |
|
|
|
443-583
| 0 |
Columbia |
MD |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2016-03-03 |
|
443-583
| 1 |
Columbia |
MD |
BLTMMDCH14Z |
2697 CTC COMMUNICATIONS CORP. - MD |
238 |
|
|
|
443-583
| 2 |
Columbia |
MD |
BLTMMD91DS2 |
2596 QUANTUM TELECOMMUNICATIONS, INC. - MD |
238 |
|
2016-01-31 |
|
443-583
| 3 |
Columbia |
MD |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2014-03-31 |
|
443-583
| 4 |
Columbia |
MD |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2014-03-31 |
|
443-583
| 5 |
Columbia |
MD |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2014-09-01 |
|
443-583
| 6 |
Columbia |
MD |
BLTMMDCHFMD |
5562 METROPCS, INC. |
238 |
|
2015-05-29 |
|
443-583
| 7 |
Columbia |
MD |
BLTMMDCHXFX |
318J COMCAST IP PHONE, LLC |
238 |
|
2014-09-16 |
|
443-583
| 8 |
Columbia |
MD |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2015-05-14 |
|
443-583
| 9 |
Columbia |
MD |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2014-11-08 |
|
443-584
| A |
Crofton |
MD |
BLTMMDCH14Z |
2697 CTC COMMUNICATIONS CORP. - MD |
238 |
|
|
|
443-584
| 0 |
Crofton |
MD |
BLTMMDCHXUX |
624H ONVOY SPECTRUM, LLC |
238 |
|
2021-05-22 |
|
443-584
| 1 |
Crofton |
MD |
BLTMMDCH14Z |
2697 CTC COMMUNICATIONS CORP. - MD |
238 |
|
|
|
443-584
| 2 |
Crofton |
MD |
|
145J TERRA NOVA TELECOM INC. |
238 |
|
2024-02-15 |
|
443-584
| 3 |
Crofton |
MD |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2014-06-06 |
|
443-584
| 4 |
Crofton |
MD |
BLTMMDCHXFX |
318J COMCAST IP PHONE, LLC |
238 |
|
2014-07-20 |
|
443-584
| 5 |
Crofton |
MD |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2015-05-21 |
|
443-584
| 6 |
Crofton |
MD |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2015-05-21 |
|
443-584
| 7 |
Crofton |
MD |
BLTMMDDN2MD |
508J CENTURYLINK COMMUNICATIONS, LLC |
238 |
|
2014-06-25 |
|
443-584
| 8 |
Crofton |
MD |
|
515J IP HORIZON LLC |
238 |
|
2016-10-14 |
|
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Last updated: Sat, 01 Jun 2024 11:59:14 UTC
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