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: 991

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
641-991 A Osceola IA   6529 T-MOBILE USA, INC. 632   2025-05-04   
641-991 0 Osceola IA   6570 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 632   2025-12-05   
641-991 1 Osceola IA   145J TERRA NOVA TELECOM INC. 632   2025-05-31   
641-991 8 Osceola IA   6529 T-MOBILE USA, INC. 632   2025-05-04   
641-991 9 Osceola IA   6529 T-MOBILE USA, INC. 632   2025-05-04   

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.