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.

NPA: 870 [Rate centres in NPA 870] [Dial plan for NPA 870]

NXX: 920

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
870-920 A Warren AR PNBLARJEX2Y  240H AIRECAST, LLC - AR 530      
870-920 0 Warren AR PNBLAREK1MD  073H TELNYX LLC 530   2022-09-16   
870-920 1 Warren AR PNBLARJEX2Y  240H AIRECAST, LLC - AR 530   2014-01-05   
870-920 2 Warren AR   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 530   2025-09-14   
870-920 4 Warren AR PNBLARJEX2Y  240H AIRECAST, LLC - AR 530   2023-08-08   
870-920 7 Warren AR PNBLARJEX7Y  508J CENTURYLINK COMMUNICATIONS, LLC 530   2015-04-23   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.