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 |
| 203-568
| 7 |
Waterbury |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-568
| 8 |
Waterbury |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-568
| 9 |
Waterbury |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-569
| A |
Stamford |
CT |
NRWLCT02YMD |
4950 CABLEVISION LIGHTPATH, INC. - CT |
920 |
|
|
|
| 203-569
| 0 |
Stamford |
CT |
NRWLCT02YMD |
4950 CABLEVISION LIGHTPATH, INC. - CT |
920 |
|
|
|
| 203-569
| 1 |
Stamford |
CT |
NRWLCT02YMD |
4950 CABLEVISION LIGHTPATH, INC. - CT |
920 |
|
|
|
| 203-569
| 2 |
Stamford |
CT |
NRWLCT02YMD |
4950 CABLEVISION LIGHTPATH, INC. - CT |
920 |
|
|
|
| 203-569
| 3 |
Stamford |
CT |
|
612K CSC VOICE, LLC |
920 |
|
|
|
| 203-569
| 4 |
Stamford |
CT |
NRWLCT02YMD |
4950 CABLEVISION LIGHTPATH, INC. - CT |
920 |
|
|
|
| 203-569
| 5 |
Stamford |
CT |
NRWLCT02YMD |
4950 CABLEVISION LIGHTPATH, INC. - CT |
920 |
|
|
|
| 203-569
| 6 |
Stamford |
CT |
NRWLCT02YMD |
4950 CABLEVISION LIGHTPATH, INC. - CT |
920 |
|
|
|
| 203-569
| 7 |
Stamford |
CT |
|
612K CSC VOICE, LLC |
920 |
|
|
|
| 203-569
| 8 |
Stamford |
CT |
NRWLCT02YMD |
4950 CABLEVISION LIGHTPATH, INC. - CT |
920 |
|
|
|
| 203-569
| 9 |
Stamford |
CT |
|
612K CSC VOICE, LLC |
920 |
|
|
|
| 203-570
| A |
Stamford |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
|
|
| 203-571
| A |
Westport |
CT |
NWHNCT02X5X |
7421 AT&T - LOCAL |
920 |
|
|
|
| 203-571
| 0 |
Westport |
CT |
|
145J TERRA NOVA TELECOM INC. |
920 |
|
2025-10-16 |
|
| 203-571
| 1 |
Westport |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
2001-05-17 |
|
| 203-571
| 2 |
Westport |
CT |
MDTWCTNIBMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
920 |
|
2016-01-19 |
|
| 203-571
| 3 |
Westport |
CT |
HRFRCT0379Z |
199F BANDWIDTH.COM CLEC, LLC - CT |
920 |
|
2014-05-02 |
|
| 203-571
| 4 |
Westport |
CT |
HRFRCT0379Z |
199F BANDWIDTH.COM CLEC, LLC - CT |
920 |
|
2014-05-02 |
|
| 203-571
| 5 |
Westport |
CT |
NWHNCT02X5X |
7421 AT&T - LOCAL |
920 |
|
|
|
| 203-571
| 6 |
Westport |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
2006-05-25 |
|
| 203-571
| 7 |
Westport |
CT |
|
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
2005-11-28 |
|
| 203-571
| 8 |
Westport |
CT |
BLFDCTAP2MD |
5562 METROPCS, INC. |
920 |
|
2002-12-11 |
|
| 203-571
| 9 |
Westport |
CT |
MDTWCTNIBMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
920 |
|
2016-01-19 |
|
| 203-572
| A |
Bridgeport |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
|
|
| 203-572
| 0 |
Bridgeport |
CT |
|
612K CSC VOICE, LLC |
920 |
|
2007-12-21 |
|
| 203-572
| 1 |
Bridgeport |
CT |
HRFRCT0379Z |
199F BANDWIDTH.COM CLEC, LLC - CT |
920 |
|
2010-02-28 |
|
| 203-572
| 2 |
Bridgeport |
CT |
MDTWCTNIBMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
920 |
|
2007-12-17 |
|
| 203-572
| 3 |
Bridgeport |
CT |
MDTWCTNIBMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
920 |
|
2007-12-17 |
|
| 203-572
| 4 |
Bridgeport |
CT |
MDTWCTNIBMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
920 |
|
2007-12-17 |
|
| 203-572
| 5 |
Bridgeport |
CT |
HRFRCT0379Z |
199F BANDWIDTH.COM CLEC, LLC - CT |
920 |
|
2010-02-28 |
|
| 203-572
| 6 |
Bridgeport |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
2008-08-04 |
|
| 203-572
| 7 |
Bridgeport |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
2007-09-03 |
|
| 203-572
| 8 |
Bridgeport |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
2007-09-03 |
|
| 203-572
| 9 |
Bridgeport |
CT |
BLFDCTAP2MD |
5562 METROPCS, INC. |
920 |
|
2011-02-26 |
|
| 203-573
| A |
Waterbury |
CT |
WTRBCT00DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-574
| A |
Waterbury |
CT |
WTRBCT00DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-575
| A |
Waterbury |
CT |
WTRBCT00DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-576
| A |
Bridgeport |
CT |
BRPTCT01DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-577
| A |
Waterbury |
CT |
MDLBCT00RS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-577
| 0 |
Waterbury |
CT |
MDLBCT00RS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-577
| 1 |
Waterbury |
CT |
MDLBCT00RS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-577
| 2 |
Waterbury |
CT |
MDLBCT00RS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-577
| 3 |
Waterbury |
CT |
MDLBCT00RS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-577
| 4 |
Waterbury |
CT |
MDLBCT00RS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-577
| 5 |
Waterbury |
CT |
SMFRCTPU4MD |
4800 LEVEL 3 COMMUNICATIONS, LLC - CT |
920 |
|
2011-01-31 |
|
| 203-577
| 6 |
Waterbury |
CT |
MDLBCT00RS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-577
| 7 |
Waterbury |
CT |
HRFRCTASBMD |
6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
920 |
|
|
|
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Last updated: Sun, 17 May 2026 03:26:51 UTC
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