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 |
| 203-529
| 5 |
Wilton |
CT |
HRFRCT0379Z |
199F BANDWIDTH.COM CLEC, LLC - CT |
920 |
|
2013-04-07 |
|
| 203-529
| 6 |
Wilton |
CT |
SMFRCTPU4MD |
4800 LEVEL 3 COMMUNICATIONS, LLC - CT |
920 |
|
2012-03-10 |
|
| 203-529
| 7 |
Wilton |
CT |
HRFRCT0379Z |
199F BANDWIDTH.COM CLEC, LLC - CT |
920 |
|
2014-02-08 |
|
| 203-529
| 8 |
Wilton |
CT |
HRFRCT0380Z |
539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT |
920 |
|
2013-05-04 |
|
| 203-529
| 9 |
Wilton |
CT |
NWHNCT02X5X |
7421 AT&T - LOCAL |
920 |
|
|
|
| 203-530
| A |
New Haven |
CT |
HRFRCTASBMD |
6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
920 |
|
|
|
| 203-531
| A |
Byram |
CT |
PTCHNYPCDS0 |
9104 VERIZON NEW YORK, INC. |
132 |
|
|
|
| 203-532
| A |
Byram |
CT |
PTCHNYPCDS0 |
9104 VERIZON NEW YORK, INC. |
132 |
|
|
|
| 203-532
| 0 |
Byram |
CT |
PTCHNYPCDS0 |
9104 VERIZON NEW YORK, INC. |
132 |
|
|
|
| 203-532
| 1 |
Byram |
CT |
PTCHNYPCDS0 |
9104 VERIZON NEW YORK, INC. |
132 |
|
|
|
| 203-532
| 2 |
Byram |
CT |
PTCHNYPCDS0 |
9104 VERIZON NEW YORK, INC. |
132 |
|
|
|
| 203-532
| 3 |
Byram |
CT |
PTCHNYPCDS0 |
9104 VERIZON NEW YORK, INC. |
132 |
|
|
|
| 203-532
| 4 |
Byram |
CT |
PTCHNYPCDS0 |
9104 VERIZON NEW YORK, INC. |
132 |
|
|
|
| 203-532
| 5 |
Byram |
CT |
|
612K CSC VOICE, LLC |
132 |
|
2003-11-15 |
|
| 203-532
| 6 |
Byram |
CT |
PTCHNYPCDS0 |
9104 VERIZON NEW YORK, INC. |
132 |
|
|
|
| 203-532
| 7 |
Byram |
CT |
PTCHNYPCDS0 |
9104 VERIZON NEW YORK, INC. |
132 |
|
|
|
| 203-532
| 8 |
Byram |
CT |
|
829J PAETEC ITEL, LLC |
132 |
|
2001-09-03 |
|
| 203-532
| 9 |
Byram |
CT |
PTCHNYPCDS0 |
9104 VERIZON NEW YORK, INC. |
132 |
|
|
|
| 203-533
| A |
Guilford |
CT |
SMFRCTPU4MD |
4800 LEVEL 3 COMMUNICATIONS, LLC - CT |
920 |
|
|
|
| 203-533
| 0 |
Guilford |
CT |
HRFRCTBCDS1 |
639C ONVOY, LLC - CT |
920 |
|
2019-02-18 |
|
| 203-533
| 1 |
Guilford |
CT |
HRFRCT0379Z |
199F BANDWIDTH.COM CLEC, LLC - CT |
920 |
|
2010-02-28 |
|
| 203-533
| 2 |
Guilford |
CT |
HRFRCT0379Z |
199F BANDWIDTH.COM CLEC, LLC - CT |
920 |
|
2012-10-06 |
|
| 203-533
| 3 |
Guilford |
CT |
HRFRCTASDS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
920 |
|
2012-02-01 |
|
| 203-533
| 4 |
Guilford |
CT |
SMFRCTPU4MD |
4800 LEVEL 3 COMMUNICATIONS, LLC - CT |
920 |
|
2004-04-16 |
|
| 203-533
| 5 |
Guilford |
CT |
HRFRCTCR3MD |
318J COMCAST IP PHONE, LLC |
920 |
|
2004-12-18 |
|
| 203-533
| 6 |
Guilford |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
2009-12-11 |
|
| 203-533
| 7 |
Guilford |
CT |
HRFRCTCR3MD |
318J COMCAST IP PHONE, LLC |
920 |
|
2012-12-17 |
|
| 203-533
| 8 |
Guilford |
CT |
HRFRCT0380Z |
539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT |
920 |
|
2013-05-03 |
|
| 203-533
| 9 |
Guilford |
CT |
HRFRCT0379Z |
199F BANDWIDTH.COM CLEC, LLC - CT |
920 |
|
2008-11-29 |
|
| 203-534
| A |
Bridgeport |
CT |
BRPTCT01DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-534
| 0 |
Bridgeport |
CT |
BRPTCT01DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-534
| 1 |
Bridgeport |
CT |
BRPTCT01DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-534
| 2 |
Bridgeport |
CT |
BRPTCT01DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-534
| 3 |
Bridgeport |
CT |
BRPTCT01DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-534
| 4 |
Bridgeport |
CT |
BRPTCT01DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-534
| 5 |
Bridgeport |
CT |
BRPTCT01DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-534
| 6 |
Bridgeport |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
2005-09-24 |
|
| 203-534
| 7 |
Bridgeport |
CT |
BRPTCT01DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-534
| 8 |
Bridgeport |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
2005-09-24 |
|
| 203-534
| 9 |
Bridgeport |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
2005-09-24 |
|
| 203-535
| A |
New Haven |
CT |
HRFRCTCR3MD |
318J COMCAST IP PHONE, LLC |
920 |
|
|
|
| 203-535
| 0 |
New Haven |
CT |
HRFRCTCR3MD |
318J COMCAST IP PHONE, LLC |
920 |
|
|
|
| 203-535
| 1 |
New Haven |
CT |
HRFRCTCR3MD |
318J COMCAST IP PHONE, LLC |
920 |
|
2006-04-16 |
|
| 203-535
| 2 |
New Haven |
CT |
HRFRCTASBMD |
6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
920 |
|
2007-07-05 |
|
| 203-535
| 3 |
New Haven |
CT |
MDTWCTNIBMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
920 |
|
2005-03-23 |
|
| 203-535
| 4 |
New Haven |
CT |
HRFRCTASBMD |
6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
920 |
|
2007-02-02 |
|
| 203-535
| 5 |
New Haven |
CT |
HRFRCTASBMD |
6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
920 |
|
2007-02-02 |
|
| 203-535
| 6 |
New Haven |
CT |
MDTWCTNIBMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
920 |
|
2005-03-23 |
|
| 203-535
| 7 |
New Haven |
CT |
MDTWCTNIBMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
920 |
|
2005-03-23 |
|
| 203-535
| 8 |
New Haven |
CT |
MDTWCTNIBMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
920 |
|
2005-03-23 |
|
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Last updated: Sun, 17 May 2026 03:26:51 UTC
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