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 |
| 203-273
| 7 |
Stamford |
CT |
HRFRCTASBMD |
6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
920 |
|
2003-05-13 |
|
| 203-273
| 8 |
Stamford |
CT |
HRFRCTASBMD |
6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
920 |
|
2003-08-09 |
|
| 203-273
| 9 |
Stamford |
CT |
HRFRCTASBMD |
6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
920 |
|
2003-10-03 |
|
| 203-274
| A |
Stamford |
CT |
MDTWCTNIBMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
920 |
|
|
|
| 203-274
| 0 |
Stamford |
CT |
MDTWCTNIBMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
920 |
|
|
|
| 203-274
| 1 |
Stamford |
CT |
MDTWCTNIBMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
920 |
|
2007-01-08 |
|
| 203-274
| 2 |
Stamford |
CT |
MDTWCTNIBMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
920 |
|
2007-02-15 |
|
| 203-274
| 3 |
Stamford |
CT |
MDTWCTNIBMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
920 |
|
2009-12-23 |
|
| 203-274
| 4 |
Stamford |
CT |
MDTWCTNIBMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
920 |
|
2014-10-01 |
|
| 203-274
| 5 |
Stamford |
CT |
|
612K CSC VOICE, LLC |
920 |
|
2003-07-01 |
|
| 203-274
| 6 |
Stamford |
CT |
|
612K CSC VOICE, LLC |
920 |
|
2004-03-01 |
|
| 203-274
| 7 |
Stamford |
CT |
|
612K CSC VOICE, LLC |
920 |
|
2007-08-10 |
|
| 203-274
| 8 |
Stamford |
CT |
SMFRCTPU4MD |
4800 LEVEL 3 COMMUNICATIONS, LLC - CT |
920 |
|
2008-02-19 |
|
| 203-274
| 9 |
Stamford |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
2007-11-22 |
|
| 203-275
| A |
Bridgeport |
CT |
BRPTCT03DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-275
| 0 |
Bridgeport |
CT |
SMFRCTPU4MD |
4800 LEVEL 3 COMMUNICATIONS, LLC - CT |
920 |
|
2008-03-24 |
|
| 203-275
| 1 |
Bridgeport |
CT |
BRPTCT01DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
2008-03-12 |
|
| 203-275
| 2 |
Bridgeport |
CT |
BRPTCT01DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
2008-03-21 |
|
| 203-275
| 3 |
Bridgeport |
CT |
BRPTCT01DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
2008-03-12 |
|
| 203-275
| 4 |
Bridgeport |
CT |
BRPTCT01DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
2008-03-12 |
|
| 203-275
| 5 |
Bridgeport |
CT |
HRFRCTASBMD |
6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
920 |
|
2008-03-24 |
|
| 203-275
| 6 |
Bridgeport |
CT |
HRFRCTASBMD |
6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
920 |
|
2008-03-24 |
|
| 203-275
| 7 |
Bridgeport |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
2008-04-21 |
|
| 203-275
| 8 |
Bridgeport |
CT |
|
612K CSC VOICE, LLC |
920 |
|
2008-04-11 |
|
| 203-275
| 9 |
Bridgeport |
CT |
HRFRCT0379Z |
199F BANDWIDTH.COM CLEC, LLC - CT |
920 |
|
2008-11-29 |
|
| 203-276
| A |
Stamford |
CT |
NRWLCT02YMD |
4950 CABLEVISION LIGHTPATH, INC. - CT |
920 |
|
|
|
| 203-276
| 0 |
Stamford |
CT |
|
612K CSC VOICE, LLC |
920 |
|
2003-05-19 |
|
| 203-276
| 1 |
Stamford |
CT |
|
612K CSC VOICE, LLC |
920 |
|
2003-05-19 |
|
| 203-276
| 2 |
Stamford |
CT |
NRWLCTCVDS0 |
4950 CABLEVISION LIGHTPATH, INC. - CT |
920 |
|
2003-05-19 |
|
| 203-276
| 3 |
Stamford |
CT |
NRWLCTCVDS0 |
4950 CABLEVISION LIGHTPATH, INC. - CT |
920 |
|
2003-05-19 |
|
| 203-276
| 4 |
Stamford |
CT |
NRWLCTCVDS0 |
4950 CABLEVISION LIGHTPATH, INC. - CT |
920 |
|
2003-05-19 |
|
| 203-276
| 5 |
Stamford |
CT |
NRWLCTCVDS0 |
4950 CABLEVISION LIGHTPATH, INC. - CT |
920 |
|
2003-05-19 |
|
| 203-276
| 6 |
Stamford |
CT |
NRWLCTCVDS0 |
4950 CABLEVISION LIGHTPATH, INC. - CT |
920 |
|
2003-05-19 |
|
| 203-276
| 7 |
Stamford |
CT |
NRWLCTCVDS0 |
4950 CABLEVISION LIGHTPATH, INC. - CT |
920 |
|
2003-05-19 |
|
| 203-276
| 8 |
Stamford |
CT |
NRWLCTCVDS0 |
4950 CABLEVISION LIGHTPATH, INC. - CT |
920 |
|
2003-05-19 |
|
| 203-276
| 9 |
Stamford |
CT |
|
612K CSC VOICE, LLC |
920 |
|
2003-05-19 |
|
| 203-277
| A |
Old Greenwich |
CT |
SMFRCTDSDS0 |
7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT |
920 |
|
|
|
| 203-277
| 0 |
Old Greenwich |
CT |
SMFRCTDSDS0 |
7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT |
920 |
|
2003-06-01 |
|
| 203-277
| 1 |
Old Greenwich |
CT |
SMFRCTDSDS0 |
7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT |
920 |
|
2003-06-01 |
|
| 203-277
| 2 |
Old Greenwich |
CT |
SMFRCTDSDS0 |
7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT |
920 |
|
2003-06-01 |
|
| 203-277
| 3 |
Old Greenwich |
CT |
SMFRCTDSDS0 |
7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT |
920 |
|
2003-06-01 |
|
| 203-277
| 4 |
Old Greenwich |
CT |
SMFRCTDSDS0 |
7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT |
920 |
|
2003-06-01 |
|
| 203-277
| 5 |
Old Greenwich |
CT |
SMFRCTDSDS0 |
7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT |
920 |
|
2003-06-01 |
|
| 203-277
| 6 |
Old Greenwich |
CT |
SMFRCTDSDS0 |
7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT |
920 |
|
2003-06-01 |
|
| 203-277
| 7 |
Old Greenwich |
CT |
SMFRCTDSDS0 |
7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT |
920 |
|
2003-06-01 |
|
| 203-277
| 8 |
Old Greenwich |
CT |
SMFRCTDSDS0 |
7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT |
920 |
|
2003-06-01 |
|
| 203-277
| 9 |
Old Greenwich |
CT |
SMFRCTDSDS0 |
7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT |
920 |
|
2003-06-01 |
|
| 203-278
| A |
Ansonia-Derby |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
|
|
| 203-278
| 0 |
Ansonia-Derby |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
|
|
| 203-278
| 1 |
Ansonia-Derby |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
|
|
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Last updated: Sun, 17 May 2026 03:26:51 UTC
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