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: MSCYIA75HMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
515-361 8 Algona IA 444G AUREON COMMUNICATIONS, LLC 632   2013-08-29   
515-498 9 Livermore IA 444G AUREON COMMUNICATIONS, LLC 632   2020-11-27   
515-884 1 Whittemore IA 444G AUREON COMMUNICATIONS, LLC 632   2013-08-29   
641-428 9 Mason City IA 444G AUREON COMMUNICATIONS, LLC 632   2013-07-16   
641-630 2 Hampton IA 444G AUREON COMMUNICATIONS, LLC 632   2020-08-28   
641-999 3 Nashua IA 444G AUREON COMMUNICATIONS, LLC 632   2020-08-28   

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

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