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: 641 [Rate centres in NPA 641] [Dial plan for NPA 641]

NXX: 674

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
641-674 A Centerville IA DESMIA72GMD  6529 T-MOBILE USA, INC. 632   2024-09-14   
641-674 3 Centerville IA   5562 METROPCS, INC. 632   2025-04-27   
641-674 4 Centerville IA   5562 METROPCS, INC. 632   2025-04-27   
641-674 8 Centerville IA DESMIA72GMD  6529 T-MOBILE USA, INC. 632   2024-09-14   
641-674 9 Centerville IA DESMIA72GMD  6529 T-MOBILE USA, INC. 632   2024-09-14   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.