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 |
| 203-553
| 1 |
New Haven |
CT |
NWHNCT03DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-553
| 2 |
New Haven |
CT |
NWHNCT03DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-553
| 3 |
New Haven |
CT |
NWHNCT03DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-553
| 4 |
New Haven |
CT |
NWHNCT03DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-553
| 5 |
New Haven |
CT |
NWHNCT03DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-553
| 6 |
New Haven |
CT |
NWHNCT03DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-553
| 7 |
New Haven |
CT |
HRFRCTCR3MD |
318J COMCAST IP PHONE, LLC |
920 |
|
2008-09-26 |
|
| 203-553
| 8 |
New Haven |
CT |
NWHNCT03DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-553
| 9 |
New Haven |
CT |
|
612K CSC VOICE, LLC |
920 |
|
2011-08-26 |
|
| 203-554
| A |
Stamford |
CT |
MDTWCTNIBMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
920 |
|
|
|
| 203-556
| A |
Bridgeport |
CT |
MDTWCTNIBMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
920 |
|
|
|
| 203-557
| A |
Westport |
CT |
NRWLCT02YMD |
4950 CABLEVISION LIGHTPATH, INC. - CT |
920 |
|
|
|
| 203-557
| 0 |
Westport |
CT |
|
612K CSC VOICE, LLC |
920 |
|
|
|
| 203-557
| 1 |
Westport |
CT |
NRWLCTCVDS0 |
4950 CABLEVISION LIGHTPATH, INC. - CT |
920 |
|
|
|
| 203-557
| 2 |
Westport |
CT |
NRWLCTCVDS0 |
4950 CABLEVISION LIGHTPATH, INC. - CT |
920 |
|
|
|
| 203-557
| 3 |
Westport |
CT |
|
612K CSC VOICE, LLC |
920 |
|
|
|
| 203-557
| 4 |
Westport |
CT |
|
612K CSC VOICE, LLC |
920 |
|
|
|
| 203-557
| 5 |
Westport |
CT |
NRWLCTCVDS0 |
4950 CABLEVISION LIGHTPATH, INC. - CT |
920 |
|
|
|
| 203-557
| 6 |
Westport |
CT |
|
612K CSC VOICE, LLC |
920 |
|
2015-07-25 |
|
| 203-557
| 7 |
Westport |
CT |
NRWLCTCVDS0 |
4950 CABLEVISION LIGHTPATH, INC. - CT |
920 |
|
|
|
| 203-557
| 8 |
Westport |
CT |
|
612K CSC VOICE, LLC |
920 |
|
|
|
| 203-557
| 9 |
Westport |
CT |
NRWLCTCVDS0 |
4950 CABLEVISION LIGHTPATH, INC. - CT |
920 |
|
|
|
| 203-558
| A |
Waterbury |
CT |
MDTWCTNIBMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
920 |
|
|
|
| 203-559
| A |
Darien |
CT |
HRFRCTCRDS0 |
7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT |
920 |
|
|
|
| 203-559
| 0 |
Darien |
CT |
BLFDCTAP2MD |
5562 METROPCS, INC. |
920 |
|
2004-02-02 |
|
| 203-559
| 1 |
Darien |
CT |
BLFDCTAP2MD |
5562 METROPCS, INC. |
920 |
|
2004-02-02 |
|
| 203-559
| 2 |
Darien |
CT |
BLFDCTAP2MD |
5562 METROPCS, INC. |
920 |
|
2007-04-11 |
|
| 203-559
| 3 |
Darien |
CT |
HRFRCTCRDS0 |
7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT |
920 |
|
|
|
| 203-559
| 4 |
Darien |
CT |
BLFDCTAP2MD |
5562 METROPCS, INC. |
920 |
|
2003-09-08 |
|
| 203-559
| 5 |
Darien |
CT |
BLFDCTAP2MD |
5562 METROPCS, INC. |
920 |
|
2003-09-08 |
|
| 203-559
| 6 |
Darien |
CT |
BLFDCTAP2MD |
5562 METROPCS, INC. |
920 |
|
2003-05-28 |
|
| 203-559
| 7 |
Darien |
CT |
BLFDCTAP2MD |
5562 METROPCS, INC. |
920 |
|
2003-05-28 |
|
| 203-559
| 8 |
Darien |
CT |
BLFDCTAP2MD |
5562 METROPCS, INC. |
920 |
|
2002-12-16 |
|
| 203-559
| 9 |
Darien |
CT |
BLFDCTAP2MD |
5562 METROPCS, INC. |
920 |
|
2002-12-16 |
|
| 203-560
| A |
Waterbury |
CT |
MDTWCTNIBMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
920 |
|
|
|
| 203-561
| A |
Stamford |
CT |
HRFRCTASBMD |
6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
920 |
|
|
|
| 203-562
| A |
New Haven |
CT |
NWHNCT03DS3 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-563
| A |
Wilton |
CT |
WLTOCT00DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-563
| 0 |
Wilton |
CT |
WLTOCT00DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-563
| 1 |
Wilton |
CT |
WLTOCT00DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-563
| 2 |
Wilton |
CT |
WLTOCT00DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-563
| 3 |
Wilton |
CT |
WLTOCT00DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-563
| 4 |
Wilton |
CT |
NWHNCT02GT0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
2007-09-07 |
|
| 203-563
| 5 |
Wilton |
CT |
WLTOCT00DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-563
| 6 |
Wilton |
CT |
WLTOCT00DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-563
| 7 |
Wilton |
CT |
WLTOCT00DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-563
| 8 |
Wilton |
CT |
HRFRCT0380Z |
539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT |
920 |
|
2013-05-04 |
|
| 203-563
| 9 |
Wilton |
CT |
WLTOCT00DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-564
| A |
Stamford |
CT |
NWHNCT02X5X |
7421 AT&T - LOCAL |
920 |
|
|
|
| 203-564
| 0 |
Stamford |
CT |
MDTWCTNIBMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
920 |
|
2004-01-12 |
|
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Last updated: Sun, 17 May 2026 03:26:51 UTC
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