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.

Switch: WTRBCT00DS0

Remotes:

Switch Switch name Switch type
MDLBCT00RS0  Middlebury, CT (Remote)  5ER 
PRSPCT00RS0  Prospect, CT (Remote)  5ER 
THTNCT00RS0  Thomaston, CT (Remote)  5ER 
WLCTCT00RS1  WOLCOTT  5ER 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
203-236 A Waterbury CT 9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-346 A Waterbury CT 9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-419 A Waterbury CT 9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-465 A Waterbury CT 9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-573 A Waterbury CT 9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-574 A Waterbury CT 9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-575 A Waterbury CT 9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-578 A Waterbury CT 9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-591 A Waterbury CT 9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-596 A Waterbury CT 9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-597 A Waterbury CT 9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-709 A Waterbury CT 9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-753 A Waterbury CT 9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-754 A Waterbury CT 9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-755 A Waterbury CT 9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-756 A Waterbury CT 9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-757 A Waterbury CT 9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      
203-759 A Waterbury CT 9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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