Local Calling Guide

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NPA: 203 [Rate centres in NPA 203] [Dial plan for NPA 203]

NXX: 635

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
203-635 A Westport CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      
203-635 0 Westport CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2004-12-29   
203-635 1 Westport CT SMFRCT0162Z  3863 CTC COMMUNICATIONS CORP. - CT 920   2005-06-06   
203-635 2 Westport CT HRFRCT0379Z  199F BANDWIDTH.COM CLEC, LLC - CT 920   2014-11-13   
203-635 3 Westport CT MDTWCTNIBMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920   2011-08-29   
203-635 4 Westport CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      
203-635 5 Westport CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2012-08-26   
203-635 6 Westport CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2012-03-03   
203-635 7 Westport CT HRFRCT0379Z  199F BANDWIDTH.COM CLEC, LLC - CT 920   2014-11-13   
203-635 8 Westport CT HRFRCT0380Z  539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920   2013-05-04   
203-635 9 Westport CT HRFRCT0380Z  539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920   2013-05-04   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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