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: CMBRIAAB1MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
515-220 A Cambridge IA 5852 HUXLEY COMMUNICATIONS COOPERATIVE - IA 632      
515-220 4 Cambridge IA 5852 HUXLEY COMMUNICATIONS COOPERATIVE - IA 632   2001-11-17   
515-367 7 Elkhart IA 5852 HUXLEY COMMUNICATIONS COOPERATIVE - IA 632   2004-09-17   

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.