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.
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OCN: 348D CAL-ORE COMMUNICATIONS, INC. - OR

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
541-200 1 Medford OR KLFLOR541MD  670   2012-09-13   
541-244 7 Grants Pass OR KLFLOR541MD  670   2012-09-13   
541-708 8 Ashland OR KLFLOR541MD  670   2012-09-13   
541-810 6 Klamath Falls OR KLFLOR541MD  670   2017-08-31   
541-887 A Klamath Falls OR KLFLOR541MD  670      
541-887 8 Klamath Falls OR KLFLOR541MD  670   2004-12-11   

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

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