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: PTNMCT00AMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
475-373 8 Bridgeport CT 732J NUSO, LLC 920   2025-02-14   
475-373 9 Bridgeport CT 732J NUSO, LLC 920   2025-02-14   
475-385 0 Stamford CT 732J NUSO, LLC 920   2025-02-24   
475-387 0 New Haven CT 732J NUSO, LLC 920   2025-04-28   
475-387 6 New Haven CT 732J NUSO, LLC 920   2025-04-28   
860-630 7 Putnam CT 732J NUSO, LLC 920   2024-09-09   
959-238 A Putnam CT 732J NUSO, LLC 920      
959-238 1 Putnam CT 732J NUSO, LLC 920   2022-11-16   
959-238 9 Putnam CT 732J NUSO, LLC 920   2024-09-09   
959-258 7 Hartford CT 732J NUSO, LLC 920   2024-11-10   
959-258 8 Hartford CT 732J NUSO, LLC 920   2024-11-10   

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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