Local Calling Guide
Area code/prefix search
NPA: 203
[Rate centres in NPA 203]
[Dial plan for NPA 203]
NXX: 900
| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 203-900
| A |
Greenwich |
CT |
|
612K CSC VOICE, LLC |
132 |
|
|
|
| 203-900
| 0 |
Greenwich |
CT |
|
539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT |
132 |
|
2012-09-15 |
|
| 203-900
| 1 |
Greenwich |
CT |
|
612K CSC VOICE, LLC |
132 |
|
2012-04-23 |
|
| 203-900
| 2 |
Greenwich |
CT |
|
4800 LEVEL 3 COMMUNICATIONS, LLC - CT |
132 |
|
2013-01-05 |
|
| 203-900
| 3 |
Greenwich |
CT |
|
4800 LEVEL 3 COMMUNICATIONS, LLC - CT |
132 |
|
2014-10-27 |
|
| 203-900
| 4 |
Greenwich |
CT |
|
199F BANDWIDTH.COM CLEC, LLC - CT |
132 |
|
2014-11-08 |
|
| 203-900
| 5 |
Greenwich |
CT |
|
4950 CABLEVISION LIGHTPATH, INC. - CT |
132 |
|
2013-12-12 |
|
| 203-900
| 6 |
Greenwich |
CT |
|
7140 TC SYSTEMS, INC. - NY |
132 |
|
2013-05-13 |
|
| 203-900
| 7 |
Greenwich |
CT |
|
199F BANDWIDTH.COM CLEC, LLC - CT |
132 |
|
2014-11-08 |
|
| 203-900
| 8 |
Greenwich |
CT |
|
539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT |
132 |
|
2012-09-15 |
|
| 203-900
| 9 |
Greenwich |
CT |
|
539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT |
132 |
|
2015-07-11 |
|
Last updated: Thu, 29 Jan 2026 14:35:03 UTC
Sponsored by: VoIP.ms
Like this site? We accept donations via PayPal.