Local Calling Guide
Area code/prefix search
NPA: 203
[Rate centres in NPA 203]
[Dial plan for NPA 203]
Block: A
<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 >>
| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 203-453
| A |
Guilford |
CT |
GUFDCT00DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-454
| A |
Westport |
CT |
WSPTCT00DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-455
| A |
Bridgeport |
CT |
SMFRCTDSDS0 |
7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT |
920 |
|
|
|
| 203-456
| A |
Danbury |
CT |
HRFRCTASBMD |
6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
920 |
|
|
|
| 203-457
| A |
Guilford |
CT |
MDSNCT02RS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-458
| A |
Guilford |
CT |
GUFDCT00DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-459
| A |
Trumbull |
CT |
TMBLCT00DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-460
| A |
Danbury |
CT |
NWHNCT02X5X |
7421 AT&T - LOCAL |
920 |
|
|
|
| 203-461
| A |
Stamford |
CT |
SMFRCT02DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-462
| A |
Stamford |
CT |
SMFRCT01DS2 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-463
| A |
Seymour |
CT |
HRFRCTCRDS0 |
7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT |
920 |
|
|
|
| 203-464
| A |
New Haven |
CT |
HRFRCTASBMD |
6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
920 |
|
|
|
| 203-465
| A |
Waterbury |
CT |
WTRBCT00DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-466
| A |
New Haven |
CT |
EHVNCT00DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-467
| A |
New Haven |
CT |
EHVNCT00DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-468
| A |
New Haven |
CT |
EHVNCT00DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-469
| A |
New Haven |
CT |
EHVNCT00DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-470
| A |
Danbury |
CT |
HRFRCTASBMD |
6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
920 |
|
|
|
| 203-477
| A |
New Haven |
CT |
HRFRCT0380Z |
6630 USA MOBILITY WIRELESS, INC. |
920 |
|
|
|
| 203-479
| A |
New Haven |
CT |
WSHNCT00DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-480
| A |
Fairfield |
CT |
SMFRCTDSDS0 |
7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT |
920 |
|
|
|
| 203-481
| A |
Branford |
CT |
BRFRCT00DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-482
| A |
Danbury |
CT |
MDTWCTNIBMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
920 |
|
|
|
| 203-483
| A |
Branford |
CT |
BRFRCT00DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-484
| A |
Branford |
CT |
NBFRCT00RS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-485
| A |
Greenwich |
CT |
GNWCCTGNX5Y |
4950 CABLEVISION LIGHTPATH, INC. - CT |
132 |
|
|
|
| 203-486
| A |
Woodbury |
CT |
SOBYCT00DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-487
| A |
Stamford |
CT |
|
4800 LEVEL 3 COMMUNICATIONS, LLC - CT |
920 |
|
|
|
| 203-488
| A |
Branford |
CT |
BRFRCT00DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-489
| A |
Greenwich |
CT |
GNWCCTGNX5X |
4950 CABLEVISION LIGHTPATH, INC. - CT |
132 |
|
|
|
| 203-490
| A |
Naugatuck |
CT |
HRFRCTCRDS0 |
7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT |
920 |
|
|
|
| 203-491
| A |
Newtown |
CT |
HRFRCT0379Z |
199F BANDWIDTH.COM CLEC, LLC - CT |
920 |
|
|
|
| 203-492
| A |
New Haven |
CT |
NWHNCT03DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-493
| A |
Georgetown |
CT |
SMFRCTPU4MD |
4800 LEVEL 3 COMMUNICATIONS, LLC - CT |
920 |
|
|
|
| 203-494
| A |
New Haven |
CT |
HRFRCTASBMD |
6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
920 |
|
|
|
| 203-495
| A |
New Haven |
CT |
NWHNCT03DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-496
| A |
Greenwich |
CT |
NYCMNYAACML |
5562 METROPCS, INC. |
132 |
|
|
|
| 203-497
| A |
New Haven |
CT |
NWHNCT03DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-498
| A |
New Haven |
CT |
NWHNCT03DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-499
| A |
New Haven |
CT |
NWHNCT03DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-500
| A |
New Haven |
CT |
MDTWCTNIBMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
920 |
|
|
|
| 203-501
| A |
Danbury |
CT |
HRFRCTASBMD |
6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
920 |
|
|
|
| 203-502
| A |
Bridgeport |
CT |
SRFRCT00DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-503
| A |
New Haven |
CT |
NWHNCT03DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-504
| A |
Stamford |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-505
| A |
Norwalk |
CT |
HRFRCTASBMD |
6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
920 |
|
|
|
| 203-506
| A |
New Haven |
CT |
MDTWCTNIBMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
920 |
|
|
|
| 203-507
| A |
New Haven |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
2024-02-09 |
|
| 203-508
| A |
New Haven |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-509
| A |
Waterbury |
CT |
BLFDCTAP2MD |
5562 METROPCS, INC. |
920 |
|
|
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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