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: FTSMARSUXKX

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
479-574 A Rogers AR 624H ONVOY SPECTRUM, LLC 526   2025-01-13   
479-666 A Waldron AR 624H ONVOY SPECTRUM, LLC 526   2024-04-15   
479-749 A Hindsville AR 624H ONVOY SPECTRUM, LLC 526   2025-01-13   
479-901 A Fort Smith AR 624H ONVOY SPECTRUM, LLC 526      
539-312 A Colcord OK 624H ONVOY SPECTRUM, LLC 526   2025-01-10   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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