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: 583

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
870-583 A Umpire AR UMPRARXARS0  1691 WINDSTREAM ARKANSAS, INC. 528      
870-583 0 Umpire AR   1691 WINDSTREAM ARKANSAS, INC. 528      
870-583 1 Umpire AR   1691 WINDSTREAM ARKANSAS, INC. 528      
870-583 2 Umpire AR   1691 WINDSTREAM ARKANSAS, INC. 528      
870-583 3 Umpire AR   1691 WINDSTREAM ARKANSAS, INC. 528      
870-583 4 Umpire AR   1691 WINDSTREAM ARKANSAS, INC. 528      
870-583 5 Umpire AR   1691 WINDSTREAM ARKANSAS, INC. 528      
870-583 6 Umpire AR   1691 WINDSTREAM ARKANSAS, INC. 528      
870-583 7 Umpire AR   1691 WINDSTREAM ARKANSAS, INC. 528      
870-583 8 Umpire AR   1691 WINDSTREAM ARKANSAS, INC. 528      
870-583 9 Umpire AR   508J CENTURYLINK COMMUNICATIONS, LLC 528   2015-03-02   

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.