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: NWHNCT02X5X

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
203-460 A Danbury CT 7421 AT&T - LOCAL 920      
203-513 A Huntington CT 7421 AT&T - LOCAL 920      
203-529 A Wilton CT 7421 AT&T - LOCAL 920      
203-564 A Stamford CT 7421 AT&T - LOCAL 920      
203-571 A Westport CT 7421 AT&T - LOCAL 920      
203-626 A Wallingford CT 7421 AT&T - LOCAL 920      
203-673 A Bridgeport CT 7421 AT&T - LOCAL 920      
203-689 A Guilford CT 7421 AT&T - LOCAL 920      
203-701 A Milford CT 7421 AT&T - LOCAL 920      
203-822 A Norwalk CT 7421 AT&T - LOCAL 920      
203-868 A New Haven CT 7421 AT&T - LOCAL 920      
203-875 A Darien CT 7421 AT&T - LOCAL 920      
860-385 A Southington CT 7421 AT&T - LOCAL 920      
860-431 A Simsbury CT 7421 AT&T - LOCAL 920      
860-438 A New Britain CT 7421 AT&T - LOCAL 920      
860-474 A Manchester CT 7421 AT&T - LOCAL 920      
860-502 A Hartford CT 7421 AT&T - LOCAL 920      
860-703 A Farmington CT 7421 AT&T - LOCAL 920      
860-847 A Windsor CT 7421 AT&T - LOCAL 920      
860-894 A Middletown CT 7421 AT&T - LOCAL 920      
860-968 A Glastonbury CT 7421 AT&T - LOCAL 920      

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

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