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: HRFRCT03XMX

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
203-713 4 Milford CT 145J TERRA NOVA TELECOM INC. 920   2024-08-23   
475-314 7 Huntington CT 145J TERRA NOVA TELECOM INC. 920   2025-01-06   
475-350 0 Stamford CT 145J TERRA NOVA TELECOM INC. 920   2024-08-16   
475-463 5 Seymour CT 145J TERRA NOVA TELECOM INC. 920   2024-05-02   
860-517 5 Plainville CT 145J TERRA NOVA TELECOM INC. 920   2024-10-24   
860-602 9 Windsor CT 145J TERRA NOVA TELECOM INC. 920   2024-10-12   
860-699 9 Ledyard CT 145J TERRA NOVA TELECOM INC. 920   2024-02-16   
860-777 9 Farmington CT 145J TERRA NOVA TELECOM INC. 920   2024-09-14   
860-838 5 Hartford CT 145J TERRA NOVA TELECOM INC. 920   2024-12-30   
959-900 A Hartford CT 145J TERRA NOVA TELECOM INC. 920      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.