Local Calling Guide
Area code/prefix search
NPA: 203
[Rate centres in NPA 203]
[Dial plan for NPA 203]
<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 >>
| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 203-643
| 0 |
Branford |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-643
| 1 |
Branford |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-643
| 2 |
Branford |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-643
| 3 |
Branford |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-643
| 4 |
Branford |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-643
| 5 |
Branford |
CT |
HRFRCTASDS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
920 |
|
2003-06-18 |
|
| 203-643
| 6 |
Branford |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
2013-12-13 |
|
| 203-643
| 7 |
Branford |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
2011-03-23 |
|
| 203-643
| 8 |
Branford |
CT |
SMFRCTPU4MD |
4800 LEVEL 3 COMMUNICATIONS, LLC - CT |
920 |
|
2004-03-07 |
|
| 203-643
| 9 |
Branford |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
2008-12-17 |
|
| 203-644
| A |
Norwalk |
CT |
HRFRCTASBMD |
6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
920 |
|
|
|
| 203-644
| 0 |
Norwalk |
CT |
HRFRCTASBMD |
6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
920 |
|
|
|
| 203-644
| 1 |
Norwalk |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
2004-06-06 |
|
| 203-644
| 2 |
Norwalk |
CT |
HRFRCTASBMD |
6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
920 |
|
|
|
| 203-644
| 3 |
Norwalk |
CT |
HRFRCTASBMD |
6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
920 |
|
2004-08-02 |
|
| 203-644
| 4 |
Norwalk |
CT |
HRFRCTASBMD |
6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
920 |
|
|
|
| 203-644
| 5 |
Norwalk |
CT |
HRFRCTASBMD |
6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
920 |
|
2005-01-04 |
|
| 203-644
| 6 |
Norwalk |
CT |
HRFRCTASBMD |
6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
920 |
|
2005-02-07 |
|
| 203-644
| 7 |
Norwalk |
CT |
HRFRCTASBMD |
6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
920 |
|
2005-06-03 |
|
| 203-644
| 8 |
Norwalk |
CT |
HRFRCTASBMD |
6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
920 |
|
2005-07-03 |
|
| 203-644
| 9 |
Norwalk |
CT |
HRFRCTASBMD |
6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
920 |
|
|
|
| 203-645
| A |
New Haven |
CT |
MDTWCTNIBMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
920 |
|
|
|
| 203-646
| A |
Branford |
CT |
|
639C ONVOY, LLC - CT |
920 |
|
|
|
| 203-646
| 0 |
Branford |
CT |
NWHNCT02XJX |
624H ONVOY SPECTRUM, LLC |
920 |
|
2021-03-12 |
|
| 203-646
| 1 |
Branford |
CT |
HRFRCTBCDS1 |
639C ONVOY, LLC - CT |
920 |
|
2023-05-06 |
|
| 203-646
| 2 |
Branford |
CT |
HRFRCTBC7MD |
506J TWILIO INTERNATIONAL, INC. |
920 |
|
2021-03-28 |
|
| 203-646
| 3 |
Branford |
CT |
HRFRCTBCDS1 |
639C ONVOY, LLC - CT |
920 |
|
2020-11-22 |
|
| 203-646
| 4 |
Branford |
CT |
HRFRCTBCDS1 |
639C ONVOY, LLC - CT |
920 |
|
2020-11-22 |
|
| 203-646
| 5 |
Branford |
CT |
HRFRCTBCDS1 |
639C ONVOY, LLC - CT |
920 |
|
2021-03-04 |
|
| 203-646
| 6 |
Branford |
CT |
HRFRCT0379Z |
199F BANDWIDTH.COM CLEC, LLC - CT |
920 |
|
2011-06-01 |
|
| 203-646
| 7 |
Branford |
CT |
|
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
2011-03-29 |
|
| 203-646
| 8 |
Branford |
CT |
HRFRCT0379Z |
199F BANDWIDTH.COM CLEC, LLC - CT |
920 |
|
2011-06-01 |
|
| 203-646
| 9 |
Branford |
CT |
|
145J TERRA NOVA TELECOM INC. |
920 |
|
2025-05-05 |
|
| 203-647
| A |
Milford |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-648
| A |
Danbury |
CT |
SMFRCTPU4MD |
4800 LEVEL 3 COMMUNICATIONS, LLC - CT |
920 |
|
|
|
| 203-648
| 0 |
Danbury |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
2003-07-22 |
|
| 203-648
| 1 |
Danbury |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
2003-07-22 |
|
| 203-648
| 2 |
Danbury |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
2003-10-11 |
|
| 203-648
| 3 |
Danbury |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
2003-10-11 |
|
| 203-648
| 4 |
Danbury |
CT |
SMFRCTPU4MD |
4800 LEVEL 3 COMMUNICATIONS, LLC - CT |
920 |
|
|
|
| 203-648
| 5 |
Danbury |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
2003-11-02 |
|
| 203-648
| 6 |
Danbury |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
2004-02-18 |
|
| 203-648
| 7 |
Danbury |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
2004-02-18 |
|
| 203-648
| 8 |
Danbury |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
2004-07-15 |
|
| 203-648
| 9 |
Danbury |
CT |
SMFRCTPU4MD |
4800 LEVEL 3 COMMUNICATIONS, LLC - CT |
920 |
|
2004-10-21 |
|
| 203-649
| A |
Cheshire |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-649
| 0 |
Cheshire |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-649
| 1 |
Cheshire |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-649
| 2 |
Cheshire |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-649
| 3 |
Cheshire |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-649
| 4 |
Cheshire |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-649
| 5 |
Cheshire |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-649
| 6 |
Cheshire |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-649
| 7 |
Cheshire |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-649
| 8 |
Cheshire |
CT |
HRFRCT0379Z |
199F BANDWIDTH.COM CLEC, LLC - CT |
920 |
|
2021-10-28 |
|
| 203-649
| 9 |
Cheshire |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-650
| A |
Bridgeport |
CT |
BLFDCTAP2MD |
5562 METROPCS, INC. |
920 |
|
|
|
| 203-650
| 0 |
Bridgeport |
CT |
BLFDCTAP2MD |
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
|
|
| 203-650
| 1 |
Bridgeport |
CT |
BLFDCTAP2MD |
5562 METROPCS, INC. |
920 |
|
|
|
| 203-650
| 2 |
Bridgeport |
CT |
BLFDCTAP2MD |
5562 METROPCS, INC. |
920 |
|
|
|
| 203-650
| 3 |
Bridgeport |
CT |
BLFDCTAP2MD |
5562 METROPCS, INC. |
920 |
|
|
|
| 203-650
| 4 |
Bridgeport |
CT |
BLFDCTAP2MD |
5562 METROPCS, INC. |
920 |
|
|
|
| 203-650
| 5 |
Bridgeport |
CT |
BLFDCTAP2MD |
5562 METROPCS, INC. |
920 |
|
|
|
| 203-650
| 6 |
Bridgeport |
CT |
BLFDCTAP2MD |
5562 METROPCS, INC. |
920 |
|
|
|
| 203-650
| 7 |
Bridgeport |
CT |
BLFDCTAP2MD |
5562 METROPCS, INC. |
920 |
|
|
|
| 203-650
| 8 |
Bridgeport |
CT |
BLFDCTAP2MD |
5562 METROPCS, INC. |
920 |
|
|
|
| 203-650
| 9 |
Bridgeport |
CT |
BLFDCTAP2MD |
5562 METROPCS, INC. |
920 |
|
|
|
| 203-651
| A |
Cheshire |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-651
| 0 |
Cheshire |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-651
| 1 |
Cheshire |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-651
| 2 |
Cheshire |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-651
| 3 |
Cheshire |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-651
| 4 |
Cheshire |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-651
| 5 |
Cheshire |
CT |
SMFRCTPU4MD |
4800 LEVEL 3 COMMUNICATIONS, LLC - CT |
920 |
|
2005-10-28 |
|
| 203-651
| 6 |
Cheshire |
CT |
HRFRCTASDS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
920 |
|
2006-06-09 |
|
| 203-651
| 7 |
Cheshire |
CT |
SMFRCTPU4MD |
4800 LEVEL 3 COMMUNICATIONS, LLC - CT |
920 |
|
2004-12-12 |
|
| 203-651
| 8 |
Cheshire |
CT |
HRFRCT0379Z |
199F BANDWIDTH.COM CLEC, LLC - CT |
920 |
|
2010-10-15 |
|
| 203-651
| 9 |
Cheshire |
CT |
|
6624 OMNIPOINT COMMUNICATIONS, INC. - CT |
920 |
|
2002-12-11 |
|
| 203-652
| A |
New Canaan |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-652
| 0 |
New Canaan |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-652
| 1 |
New Canaan |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-652
| 2 |
New Canaan |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-652
| 3 |
New Canaan |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-652
| 4 |
New Canaan |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-652
| 5 |
New Canaan |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-652
| 6 |
New Canaan |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-652
| 7 |
New Canaan |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-652
| 8 |
New Canaan |
CT |
SMFRCTPU4MD |
4800 LEVEL 3 COMMUNICATIONS, LLC - CT |
920 |
|
2006-01-02 |
|
| 203-652
| 9 |
New Canaan |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-653
| A |
Stamford |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-653
| 0 |
Stamford |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-653
| 1 |
Stamford |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-653
| 2 |
Stamford |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-653
| 3 |
Stamford |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-653
| 4 |
Stamford |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-653
| 5 |
Stamford |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-653
| 6 |
Stamford |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-653
| 7 |
Stamford |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
| 203-653
| 8 |
Stamford |
CT |
HRFRCT0379Z |
199F BANDWIDTH.COM CLEC, LLC - CT |
920 |
|
2011-05-27 |
|
| 203-653
| 9 |
Stamford |
CT |
|
829J PAETEC ITEL, LLC |
920 |
|
|
|
<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 >>
Last updated: Thu, 16 Oct 2025 03:04:18 UTC
Sponsored by: VoIP.ms
Like this site? We accept donations via PayPal.