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: 392

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
203-392 A New Haven CT WSTVCT00DS0  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-392 0 New Haven CT WSTVCT00DS0  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-392 1 New Haven CT HRFRCT0379Z  199F BANDWIDTH.COM CLEC, LLC - CT 920      
203-392 2 New Haven CT WSTVCT00DS0  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-392 3 New Haven CT WSTVCT00DS0  9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-392 4 New Haven CT BLFDCTAP2MD  6624 OMNIPOINT COMMUNICATIONS, INC. - CT 920      
203-392 5 New Haven CT HRFRCT0342Z  3863 CTC COMMUNICATIONS CORP. - CT 920      
203-392 6 New Haven CT HRFRCT0342Z  3863 CTC COMMUNICATIONS CORP. - CT 920      
203-392 7 New Haven CT HRFRCT0342Z  3863 CTC COMMUNICATIONS CORP. - CT 920      
203-392 8 New Haven CT HRFRCT0342Z  3863 CTC COMMUNICATIONS CORP. - CT 920      
203-392 9 New Haven CT HRFRCT0342Z  3863 CTC COMMUNICATIONS CORP. - CT 920      

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.