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 |
443-420
| 5 |
Ellicott City |
MD |
BLTMMDCHXMX |
506J TWILIO INTERNATIONAL, INC. |
238 |
|
2020-12-26 |
|
443-420
| 6 |
Ellicott City |
MD |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2016-04-08 |
|
443-420
| 7 |
Ellicott City |
MD |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2010-02-22 |
|
443-420
| 8 |
Ellicott City |
MD |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2010-02-22 |
|
443-420
| 9 |
Ellicott City |
MD |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2016-04-08 |
|
443-421
| A |
Fork |
MD |
CLMAMDORGT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
|
|
443-422
| A |
Glen Burnie |
MD |
CLMAMDORGT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
|
|
443-422
| 0 |
Glen Burnie |
MD |
CLMAMDORGT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2009-05-26 |
|
443-422
| 1 |
Glen Burnie |
MD |
CLMAMDORGT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2010-05-10 |
|
443-422
| 2 |
Glen Burnie |
MD |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2010-04-29 |
|
443-422
| 3 |
Glen Burnie |
MD |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2010-06-26 |
|
443-422
| 4 |
Glen Burnie |
MD |
BLTOMDKHBMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2011-02-05 |
|
443-422
| 5 |
Glen Burnie |
MD |
BLTOMDKHBMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2011-02-05 |
|
443-422
| 6 |
Glen Burnie |
MD |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2012-11-25 |
|
443-422
| 7 |
Glen Burnie |
MD |
CLMAMDORGT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2011-04-03 |
|
443-422
| 8 |
Glen Burnie |
MD |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2010-12-03 |
|
443-422
| 9 |
Glen Burnie |
MD |
BLTOMDKHBMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2011-08-18 |
|
443-423
| A |
Baltimore |
MD |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
|
|
443-423
| 0 |
Baltimore |
MD |
HNVAMDBHAMD |
3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD |
238 |
|
2005-10-12 |
|
443-423
| 1 |
Baltimore |
MD |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
|
|
443-423
| 2 |
Baltimore |
MD |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2005-01-27 |
|
443-423
| 3 |
Baltimore |
MD |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2005-01-27 |
|
443-423
| 4 |
Baltimore |
MD |
BLTMMDCHDS2 |
9212 VERIZON MARYLAND, INC. |
238 |
|
2003-09-06 |
|
443-423
| 5 |
Baltimore |
MD |
BLTMMDCHDS2 |
9212 VERIZON MARYLAND, INC. |
238 |
|
2003-09-06 |
|
443-423
| 6 |
Baltimore |
MD |
BLTMMDCHDS2 |
9212 VERIZON MARYLAND, INC. |
238 |
|
2003-09-06 |
|
443-423
| 7 |
Baltimore |
MD |
BLTMMDCHDS2 |
9212 VERIZON MARYLAND, INC. |
238 |
|
2003-09-06 |
|
443-423
| 8 |
Baltimore |
MD |
BLTMMDCHDS3 |
9212 VERIZON MARYLAND, INC. |
238 |
|
2004-06-04 |
|
443-423
| 9 |
Baltimore |
MD |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2005-01-27 |
|
443-424
| A |
Cardiff |
MD |
BLTMMDFMDS0 |
7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD |
238 |
|
|
|
443-424
| 0 |
Cardiff |
MD |
BLTMMDCH47Z |
420C ARMSTRONG TELECOMMUNICATIONS, INC. - MD |
238 |
|
2008-09-08 |
|
443-424
| 1 |
Cardiff |
MD |
CLMAMDJTAMD |
2589 US LEC OF MARYLAND, INC. |
238 |
|
2004-02-02 |
|
443-424
| 2 |
Cardiff |
MD |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2008-12-11 |
|
443-424
| 3 |
Cardiff |
MD |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2011-08-15 |
|
443-424
| 4 |
Cardiff |
MD |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2019-03-07 |
|
443-424
| 5 |
Cardiff |
MD |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2011-02-28 |
|
443-424
| 6 |
Cardiff |
MD |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2012-10-07 |
|
443-424
| 7 |
Cardiff |
MD |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2011-06-02 |
|
443-424
| 8 |
Cardiff |
MD |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2010-02-25 |
|
443-424
| 9 |
Cardiff |
MD |
BLTMMDFMDS0 |
7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD |
238 |
|
|
|
443-425
| A |
Parkville |
MD |
BLTMMDCHCMD |
7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD |
238 |
|
|
|
443-425
| 0 |
Parkville |
MD |
BLTOMDKHBMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2012-05-21 |
|
443-425
| 1 |
Parkville |
MD |
BLTMMDCHCMD |
7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD |
238 |
|
|
|
443-425
| 2 |
Parkville |
MD |
BLTOMDKHBMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2012-05-21 |
|
443-425
| 3 |
Parkville |
MD |
BLTOMDKHDS0 |
7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD |
238 |
|
2008-10-01 |
|
443-425
| 4 |
Parkville |
MD |
BLTOMDKHBMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2011-11-17 |
|
443-425
| 5 |
Parkville |
MD |
BLTOMDKHBMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2011-11-17 |
|
443-425
| 6 |
Parkville |
MD |
BLTOMDKHBMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2011-11-17 |
|
443-425
| 7 |
Parkville |
MD |
BLTOMDKHBMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2011-11-17 |
|
443-425
| 8 |
Parkville |
MD |
BLTOMDKHBMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2011-11-17 |
|
443-425
| 9 |
Parkville |
MD |
BLTOMDKHBMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2015-06-30 |
|
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Last updated: Sat, 01 Jun 2024 11:59:14 UTC
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