Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 870 [Rate centres in NPA 870] [Dial plan for NPA 870]

NXX: 989

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
870-989 A Black Rock AR LTRKARFRXMZ  515J IP HORIZON LLC 528   2024-04-08   
870-989 0 Black Rock AR JNBOARMAX1X  624H ONVOY SPECTRUM, LLC 528   2025-01-07   
870-989 1 Black Rock AR   515J IP HORIZON LLC 528   2024-04-08   
870-989 2 Black Rock AR   515J IP HORIZON LLC 528   2026-07-09   
870-989 3 Black Rock AR   515J IP HORIZON LLC 528   2026-07-09   
870-989 7 Black Rock AR   883K AHOI LLC 528   2026-10-29   
870-989 8 Black Rock AR LTRKARFRXGZ  114J EXIANT COMMUNICATIONS LLC 528   2025-06-22   

Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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