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 >>
NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
443-537
| 8 |
Columbia |
MD |
BLTOMDKHBMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2010-06-14 |
|
443-537
| 9 |
Columbia |
MD |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2011-02-05 |
|
443-538
| A |
Columbia |
MD |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
|
|
443-539
| A |
Columbia |
MD |
CLMAMDJTAMD |
2589 US LEC OF MARYLAND, INC. |
238 |
|
|
|
443-539
| 0 |
Columbia |
MD |
CLMAMDJTAMD |
2589 US LEC OF MARYLAND, INC. |
238 |
|
|
|
443-539
| 1 |
Columbia |
MD |
CLMAMDJTAMD |
2589 US LEC OF MARYLAND, INC. |
238 |
|
|
|
443-539
| 2 |
Columbia |
MD |
CLMAMDJTAMD |
2589 US LEC OF MARYLAND, INC. |
238 |
|
|
|
443-539
| 3 |
Columbia |
MD |
CLMAMDJTAMD |
2589 US LEC OF MARYLAND, INC. |
238 |
|
|
|
443-539
| 4 |
Columbia |
MD |
BLTMMDCHW29 |
4716 PAETEC COMMUNICATIONS, INC. - MD |
238 |
|
2006-08-15 |
|
443-539
| 5 |
Columbia |
MD |
BLTOMDKHDS0 |
7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD |
238 |
|
2008-10-01 |
|
443-539
| 6 |
Columbia |
MD |
BLTOMDKHBMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2011-10-28 |
|
443-539
| 7 |
Columbia |
MD |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2010-02-15 |
|
443-539
| 8 |
Columbia |
MD |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2008-02-13 |
|
443-539
| 9 |
Columbia |
MD |
CLMAMDJTAMD |
2589 US LEC OF MARYLAND, INC. |
238 |
|
|
|
443-540
| A |
Baltimore |
MD |
CLMAMDORGT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
|
|
443-541
| A |
Cockeysville |
MD |
BLTMMDCHW29 |
4716 PAETEC COMMUNICATIONS, INC. - MD |
238 |
|
|
|
443-541
| 0 |
Cockeysville |
MD |
BLTMMDCHW29 |
4716 PAETEC COMMUNICATIONS, INC. - MD |
238 |
|
|
|
443-541
| 1 |
Cockeysville |
MD |
BLTMMDCHW29 |
4716 PAETEC COMMUNICATIONS, INC. - MD |
238 |
|
|
|
443-541
| 2 |
Cockeysville |
MD |
BLTMMDCHW29 |
4716 PAETEC COMMUNICATIONS, INC. - MD |
238 |
|
|
|
443-541
| 3 |
Cockeysville |
MD |
BLTMMDCHW29 |
4716 PAETEC COMMUNICATIONS, INC. - MD |
238 |
|
|
|
443-541
| 4 |
Cockeysville |
MD |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2003-08-20 |
|
443-541
| 5 |
Cockeysville |
MD |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2005-01-10 |
|
443-541
| 6 |
Cockeysville |
MD |
|
515J IP HORIZON LLC |
238 |
|
2016-10-14 |
|
443-541
| 7 |
Cockeysville |
MD |
BLTMMDCHX7X |
073H TELNYX LLC |
238 |
|
2017-03-14 |
|
443-541
| 8 |
Cockeysville |
MD |
BLTMMDCHW29 |
4716 PAETEC COMMUNICATIONS, INC. - MD |
238 |
|
|
|
443-541
| 9 |
Cockeysville |
MD |
BLTMMDCHW29 |
4716 PAETEC COMMUNICATIONS, INC. - MD |
238 |
|
|
|
443-542
| A |
Columbia |
MD |
BLTMMDCHXFX |
318J COMCAST IP PHONE, LLC |
238 |
|
|
|
443-542
| 0 |
Columbia |
MD |
BLTMMDCHXFX |
318J COMCAST IP PHONE, LLC |
238 |
|
|
|
443-542
| 1 |
Columbia |
MD |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2004-11-25 |
|
443-542
| 2 |
Columbia |
MD |
BLTMMDCHXFX |
318J COMCAST IP PHONE, LLC |
238 |
|
|
|
443-542
| 3 |
Columbia |
MD |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2005-03-12 |
|
443-542
| 4 |
Columbia |
MD |
CLMAMDSRRS0 |
9212 VERIZON MARYLAND, INC. |
238 |
|
2004-12-20 |
|
443-542
| 5 |
Columbia |
MD |
HNVAMDBHAMD |
3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD |
238 |
|
2004-06-25 |
|
443-542
| 6 |
Columbia |
MD |
CLMAMDSRRS0 |
9212 VERIZON MARYLAND, INC. |
238 |
|
2004-12-20 |
|
443-542
| 7 |
Columbia |
MD |
BLTOMDKHBMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2007-02-02 |
|
443-542
| 8 |
Columbia |
MD |
BLTOMDKHBMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2007-09-01 |
|
443-542
| 9 |
Columbia |
MD |
BLTMMDCHXFX |
318J COMCAST IP PHONE, LLC |
238 |
|
2007-01-19 |
|
443-543
| A |
Arbutus |
MD |
ARBTMDARDS0 |
9212 VERIZON MARYLAND, INC. |
238 |
|
|
|
443-543
| 0 |
Arbutus |
MD |
ARBTMDARDS0 |
9212 VERIZON MARYLAND, INC. |
238 |
|
|
|
443-543
| 1 |
Arbutus |
MD |
ARBTMDARDS0 |
9212 VERIZON MARYLAND, INC. |
238 |
|
|
|
443-543
| 2 |
Arbutus |
MD |
ARBTMDARDS0 |
9212 VERIZON MARYLAND, INC. |
238 |
|
|
|
443-543
| 3 |
Arbutus |
MD |
ARBTMDARDS0 |
9212 VERIZON MARYLAND, INC. |
238 |
|
|
|
443-543
| 4 |
Arbutus |
MD |
BLTQMD013MD |
939H COMMIO, LLC |
238 |
|
2021-07-05 |
|
443-543
| 5 |
Arbutus |
MD |
ARBTMDARDS0 |
9212 VERIZON MARYLAND, INC. |
238 |
|
|
|
443-543
| 6 |
Arbutus |
MD |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2011-07-02 |
|
443-543
| 7 |
Arbutus |
MD |
BLTMMDCHXUX |
624H ONVOY SPECTRUM, LLC |
238 |
|
2021-11-26 |
|
443-543
| 8 |
Arbutus |
MD |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2014-10-06 |
|
443-543
| 9 |
Arbutus |
MD |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2014-10-06 |
|
443-544
| A |
Pikesville |
MD |
HNVAMDBHAMD |
3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD |
238 |
|
|
|
443-544
| 0 |
Pikesville |
MD |
HNVAMDBHAMD |
3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD |
238 |
|
|
|
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Last updated: Wed, 07 Feb 2024 04:12:25 UTC
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