Local Calling Guide
Area code/prefix search
NPA: 203
[Rate centres in NPA 203]
[Dial plan for NPA 203]
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| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 203-564
| 1 |
Stamford |
CT |
NWHNCT02X5X |
7421 AT&T - LOCAL |
920 |
|
|
|
| 203-564
| 2 |
Stamford |
CT |
|
145J TERRA NOVA TELECOM INC. |
920 |
|
2023-08-05 |
|
| 203-564
| 3 |
Stamford |
CT |
MDTWCTNIBMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
920 |
|
2004-04-16 |
|
| 203-564
| 4 |
Stamford |
CT |
HRFRCTASBMD |
6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
920 |
|
2014-09-06 |
|
| 203-564
| 5 |
Stamford |
CT |
NWHNCT02X5X |
7421 AT&T - LOCAL |
920 |
|
|
|
| 203-564
| 6 |
Stamford |
CT |
MDTWCTNIBMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
920 |
|
2004-08-08 |
|
| 203-564
| 7 |
Stamford |
CT |
HRFRCTASBMD |
6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
920 |
|
2014-09-06 |
|
| 203-564
| 8 |
Stamford |
CT |
NWHNCT02X5X |
7421 AT&T - LOCAL |
920 |
|
2009-06-14 |
|
| 203-564
| 9 |
Stamford |
CT |
HRFRCT0379Z |
199F BANDWIDTH.COM CLEC, LLC - CT |
920 |
|
2010-08-20 |
|
| 203-565
| A |
Waterbury |
CT |
BLFDCTAP2MD |
5562 METROPCS, INC. |
920 |
|
2024-02-09 |
|
| 203-565
| 0 |
Waterbury |
CT |
BLFDCTAP2MD |
5562 METROPCS, INC. |
920 |
|
2011-02-16 |
|
| 203-565
| 1 |
Waterbury |
CT |
BLFDCTAP2MD |
5562 METROPCS, INC. |
920 |
|
|
|
| 203-565
| 2 |
Waterbury |
CT |
BLFDCTAP2MD |
5562 METROPCS, INC. |
920 |
|
|
|
| 203-565
| 3 |
Waterbury |
CT |
BLFDCTAP2MD |
5562 METROPCS, INC. |
920 |
|
|
|
| 203-565
| 4 |
Waterbury |
CT |
BLFDCTAP2MD |
5562 METROPCS, INC. |
920 |
|
|
|
| 203-565
| 5 |
Waterbury |
CT |
BLFDCTAP2MD |
5562 METROPCS, INC. |
920 |
|
|
|
| 203-565
| 6 |
Waterbury |
CT |
BLFDCTAP2MD |
5562 METROPCS, INC. |
920 |
|
|
|
| 203-565
| 7 |
Waterbury |
CT |
BLFDCTAP2MD |
5562 METROPCS, INC. |
920 |
|
|
|
| 203-565
| 8 |
Waterbury |
CT |
BLFDCTAP2MD |
5562 METROPCS, INC. |
920 |
|
|
|
| 203-565
| 9 |
Waterbury |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
|
|
| 203-566
| A |
Stamford |
CT |
SMFRCTDSDS0 |
7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT |
920 |
|
|
|
| 203-566
| 0 |
Stamford |
CT |
SMFRCTDSDS0 |
7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT |
920 |
|
2003-03-22 |
|
| 203-566
| 1 |
Stamford |
CT |
SMFRCTDSDS0 |
7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT |
920 |
|
2003-03-22 |
|
| 203-566
| 2 |
Stamford |
CT |
SMFRCTDSDS0 |
7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT |
920 |
|
2003-03-22 |
|
| 203-566
| 3 |
Stamford |
CT |
SMFRCTDSDS0 |
7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT |
920 |
|
2003-03-22 |
|
| 203-566
| 4 |
Stamford |
CT |
SMFRCTDSDS0 |
7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT |
920 |
|
2003-03-22 |
|
| 203-566
| 5 |
Stamford |
CT |
SMFRCTDSDS0 |
7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT |
920 |
|
2003-03-22 |
|
| 203-566
| 6 |
Stamford |
CT |
SMFRCTDSDS0 |
7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT |
920 |
|
2003-03-22 |
|
| 203-566
| 7 |
Stamford |
CT |
SMFRCTDSDS0 |
7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT |
920 |
|
2003-03-22 |
|
| 203-566
| 8 |
Stamford |
CT |
SMFRCTDSDS0 |
7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT |
920 |
|
2003-03-22 |
|
| 203-566
| 9 |
Stamford |
CT |
SMFRCTDSDS0 |
7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT |
920 |
|
2003-03-22 |
|
| 203-567
| A |
Huntington |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-567
| 0 |
Huntington |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-567
| 1 |
Huntington |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-567
| 2 |
Huntington |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-567
| 3 |
Huntington |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-567
| 4 |
Huntington |
CT |
SMFRCTPU4MD |
4800 LEVEL 3 COMMUNICATIONS, LLC - CT |
920 |
|
2005-09-08 |
|
| 203-567
| 5 |
Huntington |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-567
| 6 |
Huntington |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-567
| 7 |
Huntington |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-567
| 8 |
Huntington |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-567
| 9 |
Huntington |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-568
| A |
Waterbury |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-568
| 0 |
Waterbury |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-568
| 1 |
Waterbury |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-568
| 2 |
Waterbury |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-568
| 3 |
Waterbury |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
2006-02-19 |
|
| 203-568
| 4 |
Waterbury |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
2008-04-21 |
|
| 203-568
| 5 |
Waterbury |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
2008-10-10 |
|
| 203-568
| 6 |
Waterbury |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
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Last updated: Sun, 17 May 2026 03:26:51 UTC
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