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 |
| 443-312
| 9 |
Brooklyn Park-Linthicum |
MD |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2008-12-11 |
|
| 443-313
| A |
Fork |
MD |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
|
|
| 443-313
| 1 |
Fork |
MD |
|
145J TERRA NOVA TELECOM INC. |
238 |
|
2025-05-07 |
|
| 443-313
| 2 |
Fork |
MD |
|
145J TERRA NOVA TELECOM INC. |
238 |
|
2022-05-06 |
|
| 443-313
| 3 |
Fork |
MD |
|
318J COMCAST IP PHONE, LLC |
238 |
|
2015-03-19 |
|
| 443-313
| 5 |
Fork |
MD |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
|
|
| 443-313
| 6 |
Fork |
MD |
|
876D ONVOY, LLC - MD |
238 |
|
2016-04-04 |
|
| 443-313
| 7 |
Fork |
MD |
|
876D ONVOY, LLC - MD |
238 |
|
2016-04-04 |
|
| 443-313
| 8 |
Fork |
MD |
|
568G PEERLESS NETWORK OF MARYLAND, LLC |
238 |
|
2013-05-04 |
|
| 443-313
| 9 |
Fork |
MD |
|
568G PEERLESS NETWORK OF MARYLAND, LLC |
238 |
|
2013-05-04 |
|
| 443-314
| A |
Baltimore |
MD |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
|
|
| 443-314
| 0 |
Baltimore |
MD |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2011-03-18 |
|
| 443-314
| 1 |
Baltimore |
MD |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2011-03-18 |
|
| 443-314
| 2 |
Baltimore |
MD |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2011-03-18 |
|
| 443-314
| 3 |
Baltimore |
MD |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2011-03-18 |
|
| 443-314
| 4 |
Baltimore |
MD |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2011-03-18 |
|
| 443-314
| 5 |
Baltimore |
MD |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2011-03-18 |
|
| 443-314
| 6 |
Baltimore |
MD |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2011-03-18 |
|
| 443-314
| 7 |
Baltimore |
MD |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2011-03-18 |
|
| 443-314
| 8 |
Baltimore |
MD |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2011-03-18 |
|
| 443-314
| 9 |
Baltimore |
MD |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2011-03-18 |
|
| 443-315
| A |
Catonsville |
MD |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
|
|
| 443-315
| 0 |
Catonsville |
MD |
|
145J TERRA NOVA TELECOM INC. |
238 |
|
2025-05-28 |
|
| 443-315
| 2 |
Catonsville |
MD |
|
876D ONVOY, LLC - MD |
238 |
|
2013-08-01 |
|
| 443-315
| 3 |
Catonsville |
MD |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2005-02-05 |
|
| 443-315
| 5 |
Catonsville |
MD |
|
318J COMCAST IP PHONE, LLC |
238 |
|
2012-05-26 |
|
| 443-315
| 6 |
Catonsville |
MD |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2005-02-05 |
|
| 443-315
| 7 |
Catonsville |
MD |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2005-02-05 |
|
| 443-315
| 8 |
Catonsville |
MD |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2005-02-05 |
|
| 443-315
| 9 |
Catonsville |
MD |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2005-02-05 |
|
| 443-316
| A |
Woodlawn |
MD |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
|
|
| 443-316
| 0 |
Woodlawn |
MD |
|
876D ONVOY, LLC - MD |
238 |
|
2024-12-02 |
|
| 443-316
| 1 |
Woodlawn |
MD |
|
876D ONVOY, LLC - MD |
238 |
|
2024-12-02 |
|
| 443-316
| 2 |
Woodlawn |
MD |
|
876D ONVOY, LLC - MD |
238 |
|
2023-05-18 |
|
| 443-316
| 3 |
Woodlawn |
MD |
|
829J PAETEC ITEL, LLC |
238 |
|
2006-05-11 |
|
| 443-316
| 4 |
Woodlawn |
MD |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2025-05-09 |
|
| 443-316
| 5 |
Woodlawn |
MD |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
|
|
| 443-316
| 6 |
Woodlawn |
MD |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
|
|
| 443-316
| 7 |
Woodlawn |
MD |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2020-04-07 |
|
| 443-316
| 8 |
Woodlawn |
MD |
|
318J COMCAST IP PHONE, LLC |
238 |
|
2008-02-01 |
|
| 443-316
| 9 |
Woodlawn |
MD |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2020-05-01 |
|
| 443-317
| A |
Chase |
MD |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
|
|
| 443-317
| 2 |
Chase |
MD |
|
876D ONVOY, LLC - MD |
238 |
|
2012-10-08 |
|
| 443-317
| 3 |
Chase |
MD |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2011-01-09 |
|
| 443-317
| 6 |
Chase |
MD |
|
318J COMCAST IP PHONE, LLC |
238 |
|
2015-08-05 |
|
| 443-317
| 7 |
Chase |
MD |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2016-07-14 |
|
| 443-317
| 8 |
Chase |
MD |
|
318J COMCAST IP PHONE, LLC |
238 |
|
2007-04-12 |
|
| 443-317
| 9 |
Chase |
MD |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2014-04-27 |
|
| 443-318
| A |
Cockeysville |
MD |
|
829J PAETEC ITEL, LLC |
238 |
|
2025-04-01 |
|
| 443-318
| 0 |
Cockeysville |
MD |
|
829J PAETEC ITEL, LLC |
238 |
|
|
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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