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 |
| 443-702
| 6 |
Armiger-Gibson Island |
MD |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2014-02-10 |
|
| 443-702
| 7 |
Armiger-Gibson Island |
MD |
|
318J COMCAST IP PHONE, LLC |
238 |
|
2008-09-25 |
|
| 443-702
| 8 |
Armiger-Gibson Island |
MD |
|
876D ONVOY, LLC - MD |
238 |
|
2021-09-23 |
|
| 443-702
| 9 |
Armiger-Gibson Island |
MD |
|
515J IP HORIZON LLC |
238 |
|
2021-08-15 |
|
| 443-703
| A |
Baltimore |
MD |
BLTMMDCHXNX |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
238 |
|
|
|
| 443-703
| 0 |
Baltimore |
MD |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
238 |
|
|
|
| 443-703
| 1 |
Baltimore |
MD |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
238 |
|
|
|
| 443-703
| 2 |
Baltimore |
MD |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
238 |
|
|
|
| 443-703
| 3 |
Baltimore |
MD |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
238 |
|
2004-03-10 |
|
| 443-703
| 4 |
Baltimore |
MD |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
238 |
|
2004-04-16 |
|
| 443-703
| 5 |
Baltimore |
MD |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
238 |
|
2004-04-16 |
|
| 443-703
| 6 |
Baltimore |
MD |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2005-08-13 |
|
| 443-703
| 7 |
Baltimore |
MD |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
238 |
|
2004-04-16 |
|
| 443-703
| 8 |
Baltimore |
MD |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2005-08-13 |
|
| 443-703
| 9 |
Baltimore |
MD |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2005-08-13 |
|
| 443-704
| A |
Odenton |
MD |
|
829J PAETEC ITEL, LLC |
238 |
|
2025-04-01 |
|
| 443-704
| 0 |
Odenton |
MD |
|
829J PAETEC ITEL, LLC |
238 |
|
|
|
| 443-704
| 1 |
Odenton |
MD |
|
829J PAETEC ITEL, LLC |
238 |
|
|
|
| 443-704
| 2 |
Odenton |
MD |
|
5562 METROPCS, INC. |
238 |
|
2014-12-26 |
|
| 443-704
| 3 |
Odenton |
MD |
|
876D ONVOY, LLC - MD |
238 |
|
2020-06-04 |
|
| 443-704
| 4 |
Odenton |
MD |
|
5562 METROPCS, INC. |
238 |
|
2014-12-22 |
|
| 443-704
| 5 |
Odenton |
MD |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2025-09-11 |
|
| 443-704
| 6 |
Odenton |
MD |
|
5562 METROPCS, INC. |
238 |
|
2015-09-20 |
|
| 443-704
| 7 |
Odenton |
MD |
|
5562 METROPCS, INC. |
238 |
|
2019-10-13 |
|
| 443-704
| 8 |
Odenton |
MD |
|
829J PAETEC ITEL, LLC |
238 |
|
|
|
| 443-704
| 9 |
Odenton |
MD |
|
568G PEERLESS NETWORK OF MARYLAND, LLC |
238 |
|
2020-08-26 |
|
| 443-705
| A |
Cockeysville |
MD |
BLTOMDKHBMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2024-03-01 |
|
| 443-705
| 0 |
Cockeysville |
MD |
|
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2018-09-16 |
|
| 443-705
| 1 |
Cockeysville |
MD |
|
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2018-09-16 |
|
| 443-705
| 4 |
Cockeysville |
MD |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2019-07-15 |
|
| 443-705
| 5 |
Cockeysville |
MD |
|
318J COMCAST IP PHONE, LLC |
238 |
|
2019-08-22 |
|
| 443-705
| 6 |
Cockeysville |
MD |
|
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2019-10-18 |
|
| 443-705
| 7 |
Cockeysville |
MD |
|
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2019-10-18 |
|
| 443-705
| 8 |
Cockeysville |
MD |
|
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2018-07-19 |
|
| 443-705
| 9 |
Cockeysville |
MD |
|
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
238 |
|
2018-07-19 |
|
| 443-706
| A |
Crisfield |
MD |
|
829J PAETEC ITEL, LLC |
242 |
|
2025-04-01 |
|
| 443-706
| 0 |
Crisfield |
MD |
|
145J TERRA NOVA TELECOM INC. |
242 |
|
2024-02-15 |
|
| 443-706
| 1 |
Crisfield |
MD |
|
876D ONVOY, LLC - MD |
242 |
|
2021-04-29 |
|
| 443-706
| 2 |
Crisfield |
MD |
|
829J PAETEC ITEL, LLC |
242 |
|
|
|
| 443-706
| 3 |
Crisfield |
MD |
|
7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD |
242 |
|
2009-03-02 |
|
| 443-706
| 4 |
Crisfield |
MD |
|
145J TERRA NOVA TELECOM INC. |
242 |
|
2024-10-12 |
|
| 443-706
| 5 |
Crisfield |
MD |
|
145J TERRA NOVA TELECOM INC. |
242 |
|
2025-07-25 |
|
| 443-706
| 7 |
Crisfield |
MD |
|
7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD |
242 |
|
2016-10-10 |
|
| 443-706
| 8 |
Crisfield |
MD |
|
876D ONVOY, LLC - MD |
242 |
|
2017-04-13 |
|
| 443-706
| 9 |
Crisfield |
MD |
|
876D ONVOY, LLC - MD |
242 |
|
2021-04-29 |
|
| 443-707
| A |
Aberdeen |
MD |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
|
|
| 443-707
| 0 |
Aberdeen |
MD |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2014-11-08 |
|
| 443-707
| 1 |
Aberdeen |
MD |
|
515J IP HORIZON LLC |
236 |
|
2014-08-08 |
|
| 443-707
| 2 |
Aberdeen |
MD |
|
876D ONVOY, LLC - MD |
236 |
|
2015-07-29 |
|
| 443-707
| 3 |
Aberdeen |
MD |
|
876D ONVOY, LLC - MD |
236 |
|
2015-07-29 |
|
<< 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
Sponsored by: VoIP.ms
Like this site? We accept donations via PayPal.