Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

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

NXX: 429

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
203-429 A Westport CT SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-429 0 Westport CT SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-429 1 Westport CT SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-429 2 Westport CT SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-429 3 Westport CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      
203-429 4 Westport CT HRFRCT0379Z  199F BANDWIDTH.COM CLEC, LLC - CT 920      
203-429 5 Westport CT HRFRCT0379Z  199F BANDWIDTH.COM CLEC, LLC - CT 920      
203-429 6 Westport CT SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-429 7 Westport CT NWLNCTCS6MD  508J CENTURYLINK COMMUNICATIONS, LLC 920      
203-429 8 Westport CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920      
203-429 9 Westport CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.