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 |
| 203-546
| 8 |
Danbury |
CT |
WLMNCT132MD |
792K CHARTER IP ENABLED SERVICES, LLC |
920 |
|
2005-01-17 |
|
| 203-546
| 9 |
Danbury |
CT |
NWLNCTCS6MD |
508J CENTURYLINK COMMUNICATIONS, LLC |
920 |
|
2014-04-11 |
|
| 203-547
| A |
Stamford |
CT |
HRFRCTBCDS1 |
639C ONVOY, LLC - CT |
920 |
|
|
|
| 203-548
| A |
Stamford |
CT |
SMFRCTPU4MD |
4800 LEVEL 3 COMMUNICATIONS, LLC - CT |
920 |
|
|
|
| 203-548
| 0 |
Stamford |
CT |
HRFRCT0379Z |
199F BANDWIDTH.COM CLEC, LLC - CT |
920 |
|
2010-02-28 |
|
| 203-548
| 1 |
Stamford |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
2008-06-21 |
|
| 203-548
| 2 |
Stamford |
CT |
NRWLCTCVDS0 |
4950 CABLEVISION LIGHTPATH, INC. - CT |
920 |
|
2003-04-16 |
|
| 203-548
| 3 |
Stamford |
CT |
NRWLCTCVDS0 |
4950 CABLEVISION LIGHTPATH, INC. - CT |
920 |
|
2003-05-09 |
|
| 203-548
| 4 |
Stamford |
CT |
NRWLCTCVDS0 |
4950 CABLEVISION LIGHTPATH, INC. - CT |
920 |
|
2003-04-16 |
|
| 203-548
| 5 |
Stamford |
CT |
NRWLCTCVDS0 |
4950 CABLEVISION LIGHTPATH, INC. - CT |
920 |
|
2003-08-01 |
|
| 203-548
| 6 |
Stamford |
CT |
NRWLCTCVDS0 |
4950 CABLEVISION LIGHTPATH, INC. - CT |
920 |
|
2003-08-01 |
|
| 203-548
| 7 |
Stamford |
CT |
HRFRCT0379Z |
199F BANDWIDTH.COM CLEC, LLC - CT |
920 |
|
2010-02-28 |
|
| 203-548
| 8 |
Stamford |
CT |
NRWLCTCVDS0 |
4950 CABLEVISION LIGHTPATH, INC. - CT |
920 |
|
2009-06-05 |
|
| 203-548
| 9 |
Stamford |
CT |
SMFRCTPU4MD |
4800 LEVEL 3 COMMUNICATIONS, LLC - CT |
920 |
|
2002-07-16 |
|
| 203-549
| A |
Bridgeport |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-549
| 0 |
Bridgeport |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-549
| 1 |
Bridgeport |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-549
| 2 |
Bridgeport |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-549
| 3 |
Bridgeport |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-549
| 4 |
Bridgeport |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
2004-01-11 |
|
| 203-549
| 5 |
Bridgeport |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
2004-01-11 |
|
| 203-549
| 6 |
Bridgeport |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-549
| 7 |
Bridgeport |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
2004-12-24 |
|
| 203-549
| 8 |
Bridgeport |
CT |
|
612K CSC VOICE, LLC |
920 |
|
2005-04-21 |
|
| 203-549
| 9 |
Bridgeport |
CT |
|
612K CSC VOICE, LLC |
920 |
|
2005-04-21 |
|
| 203-550
| A |
Stamford |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
|
|
| 203-551
| A |
Bridgeport |
CT |
HRFRCTCRDS0 |
7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT |
920 |
|
|
|
| 203-551
| 0 |
Bridgeport |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
2006-09-30 |
|
| 203-551
| 1 |
Bridgeport |
CT |
MDTWCTNIBMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
920 |
|
2006-09-20 |
|
| 203-551
| 2 |
Bridgeport |
CT |
HRFRCTCRDS0 |
7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT |
920 |
|
|
|
| 203-551
| 3 |
Bridgeport |
CT |
HRFRCTCRDS0 |
7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT |
920 |
|
|
|
| 203-551
| 4 |
Bridgeport |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
2007-10-08 |
|
| 203-551
| 5 |
Bridgeport |
CT |
HRFRCTCRDS0 |
7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT |
920 |
|
|
|
| 203-551
| 6 |
Bridgeport |
CT |
HRFRCTCRDS0 |
7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT |
920 |
|
|
|
| 203-551
| 7 |
Bridgeport |
CT |
HRFRCTCRDS0 |
7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT |
920 |
|
|
|
| 203-551
| 8 |
Bridgeport |
CT |
HRFRCTCRDS0 |
7143 TELEPORT COMMUNICATIONS AMERICA, LLC - CT |
920 |
|
|
|
| 203-551
| 9 |
Bridgeport |
CT |
SMFRCTPU4MD |
4800 LEVEL 3 COMMUNICATIONS, LLC - CT |
920 |
|
2006-07-01 |
|
| 203-552
| A |
Byram |
CT |
GNWCCTGNDS0 |
9104 VERIZON NEW YORK, INC. |
132 |
|
|
|
| 203-552
| 0 |
Byram |
CT |
GNWCCTGNDS0 |
9104 VERIZON NEW YORK, INC. |
132 |
|
|
|
| 203-552
| 1 |
Byram |
CT |
GNWCCTGNDS0 |
9104 VERIZON NEW YORK, INC. |
132 |
|
|
|
| 203-552
| 2 |
Byram |
CT |
WHPLNYWPXOY |
199F BANDWIDTH.COM CLEC, LLC - CT |
132 |
|
2010-03-11 |
|
| 203-552
| 3 |
Byram |
CT |
GNWCCTGNDS0 |
9104 VERIZON NEW YORK, INC. |
132 |
|
|
|
| 203-552
| 4 |
Byram |
CT |
GNWCCTGNDS0 |
9104 VERIZON NEW YORK, INC. |
132 |
|
|
|
| 203-552
| 5 |
Byram |
CT |
GNWCCTGNDS0 |
9104 VERIZON NEW YORK, INC. |
132 |
|
|
|
| 203-552
| 6 |
Byram |
CT |
GNWCCTGNDS0 |
9104 VERIZON NEW YORK, INC. |
132 |
|
|
|
| 203-552
| 7 |
Byram |
CT |
GNWCCTGNDS0 |
9104 VERIZON NEW YORK, INC. |
132 |
|
|
|
| 203-552
| 8 |
Byram |
CT |
GNWCCTGNDS0 |
9104 VERIZON NEW YORK, INC. |
132 |
|
|
|
| 203-552
| 9 |
Byram |
CT |
GNWCCTGNDS0 |
9104 VERIZON NEW YORK, INC. |
132 |
|
|
|
| 203-553
| A |
New Haven |
CT |
NWHNCT03DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
| 203-553
| 0 |
New Haven |
CT |
NWHNCT03DS0 |
9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
920 |
|
|
|
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Last updated: Sun, 17 May 2026 03:26:51 UTC
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