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 |
| 443-329
| 2 |
Waterloo (Washington DC LATA) |
MD |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
236 |
|
2006-02-20 |
|
| 443-329
| 3 |
Waterloo (Washington DC LATA) |
MD |
|
281E YMAX COMMUNICATIONS CORP. - MD |
236 |
|
2009-01-15 |
|
| 443-329
| 4 |
Waterloo (Washington DC LATA) |
MD |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
236 |
|
|
|
| 443-329
| 5 |
Waterloo (Washington DC LATA) |
MD |
|
876D ONVOY, LLC - MD |
236 |
|
2020-06-20 |
|
| 443-329
| 6 |
Waterloo (Washington DC LATA) |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2019-04-30 |
|
| 443-329
| 7 |
Waterloo (Washington DC LATA) |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2019-04-30 |
|
| 443-329
| 8 |
Waterloo (Washington DC LATA) |
MD |
|
073H TELNYX LLC |
236 |
|
2017-04-27 |
|
| 443-329
| 9 |
Waterloo (Washington DC LATA) |
MD |
|
876D ONVOY, LLC - MD |
236 |
|
2020-06-20 |
|
| 443-330
| A |
Cockeysville |
MD |
|
829J PAETEC ITEL, LLC |
238 |
|
2025-04-01 |
|
| 443-330
| 0 |
Cockeysville |
MD |
|
829J PAETEC ITEL, LLC |
238 |
|
|
|
| 443-330
| 1 |
Cockeysville |
MD |
|
829J PAETEC ITEL, LLC |
238 |
|
|
|
| 443-330
| 2 |
Cockeysville |
MD |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2010-02-22 |
|
| 443-330
| 3 |
Cockeysville |
MD |
|
829J PAETEC ITEL, LLC |
238 |
|
2005-03-10 |
|
| 443-330
| 4 |
Cockeysville |
MD |
|
829J PAETEC ITEL, LLC |
238 |
|
2004-09-05 |
|
| 443-330
| 5 |
Cockeysville |
MD |
|
318J COMCAST IP PHONE, LLC |
238 |
|
2006-10-22 |
|
| 443-330
| 6 |
Cockeysville |
MD |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
238 |
|
2011-04-13 |
|
| 443-330
| 7 |
Cockeysville |
MD |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2013-09-08 |
|
| 443-330
| 8 |
Cockeysville |
MD |
|
9212 VERIZON MARYLAND, INC. |
238 |
|
2006-10-16 |
|
| 443-330
| 9 |
Cockeysville |
MD |
|
829J PAETEC ITEL, LLC |
238 |
|
|
|
| 443-331
| A |
Taneytown |
MD |
|
829J PAETEC ITEL, LLC |
238 |
|
2025-04-01 |
|
| 443-331
| 0 |
Taneytown |
MD |
|
145J TERRA NOVA TELECOM INC. |
238 |
|
2024-02-15 |
|
| 443-331
| 1 |
Taneytown |
MD |
|
829J PAETEC ITEL, LLC |
238 |
|
|
|
| 443-331
| 2 |
Taneytown |
MD |
|
876D ONVOY, LLC - MD |
238 |
|
2024-03-03 |
|
| 443-331
| 3 |
Taneytown |
MD |
|
318J COMCAST IP PHONE, LLC |
238 |
|
2014-11-25 |
|
| 443-331
| 4 |
Taneytown |
MD |
|
876D ONVOY, LLC - MD |
238 |
|
2016-03-21 |
|
| 443-331
| 5 |
Taneytown |
MD |
|
876D ONVOY, LLC - MD |
238 |
|
2016-03-21 |
|
| 443-331
| 7 |
Taneytown |
MD |
|
508J CENTURYLINK COMMUNICATIONS, LLC |
238 |
|
2014-06-25 |
|
| 443-331
| 8 |
Taneytown |
MD |
|
8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) |
238 |
|
2015-07-17 |
|
| 443-331
| 9 |
Taneytown |
MD |
|
876D ONVOY, LLC - MD |
238 |
|
2016-04-08 |
|
| 443-332
| A |
Crofton |
MD |
|
829J PAETEC ITEL, LLC |
238 |
|
2025-04-01 |
|
| 443-332
| 0 |
Crofton |
MD |
|
829J PAETEC ITEL, LLC |
238 |
|
|
|
| 443-332
| 1 |
Crofton |
MD |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2020-09-12 |
|
| 443-332
| 2 |
Crofton |
MD |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2021-08-30 |
|
| 443-332
| 3 |
Crofton |
MD |
|
876D ONVOY, LLC - MD |
238 |
|
2024-03-03 |
|
| 443-332
| 4 |
Crofton |
MD |
|
829J PAETEC ITEL, LLC |
238 |
|
2002-07-12 |
|
| 443-332
| 5 |
Crofton |
MD |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2021-08-30 |
|
| 443-332
| 6 |
Crofton |
MD |
|
829J PAETEC ITEL, LLC |
238 |
|
2006-03-28 |
|
| 443-332
| 7 |
Crofton |
MD |
|
876D ONVOY, LLC - MD |
238 |
|
2021-04-29 |
|
| 443-332
| 8 |
Crofton |
MD |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2020-11-29 |
|
| 443-332
| 9 |
Crofton |
MD |
|
876D ONVOY, LLC - MD |
238 |
|
2021-04-29 |
|
| 443-333
| A |
Annapolis |
MD |
CLMAMDORGT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
|
|
| 443-333
| 0 |
Annapolis |
MD |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2009-06-02 |
|
| 443-333
| 1 |
Annapolis |
MD |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2010-02-19 |
|
| 443-333
| 2 |
Annapolis |
MD |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2022-11-13 |
|
| 443-333
| 3 |
Annapolis |
MD |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2010-04-15 |
|
| 443-333
| 4 |
Annapolis |
MD |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2011-11-09 |
|
| 443-333
| 5 |
Annapolis |
MD |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
238 |
|
2010-07-18 |
|
| 443-333
| 6 |
Annapolis |
MD |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2009-06-23 |
|
| 443-333
| 7 |
Annapolis |
MD |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2009-06-23 |
|
| 443-333
| 8 |
Annapolis |
MD |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2010-10-28 |
|
<< 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 >>
Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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