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: HMBLIACORS3

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
515-332 A Humboldt IA 9631 QWEST CORPORATION 632      
515-332 1 Humboldt IA 9631 QWEST CORPORATION 632      
515-332 2 Humboldt IA 9631 QWEST CORPORATION 632      
515-332 3 Humboldt IA 9631 QWEST CORPORATION 632      
515-332 4 Humboldt IA 9631 QWEST CORPORATION 632      
515-332 5 Humboldt IA 9631 QWEST CORPORATION 632      
515-332 7 Humboldt IA 9631 QWEST CORPORATION 632      
515-332 9 Humboldt IA 9631 QWEST CORPORATION 632      

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.