Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 256 [Rate centres in NPA 256] [Dial plan for NPA 256]

NXX: 320

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
256-320 A Sheffield AL HNVIAL03CM1  6664 SPRINT SPECTRUM, L.P. 477      
256-320 0 Sheffield AL HNVIAL03CM4  6744 SOUTHERN COMMUNICATIONS SERVICES, INC. 477   2004-08-08   
256-320 1 Sheffield AL HNVIALUNX0X  5255 LEVEL 3 COMMUNICATIONS, LLC - AL 477   2007-03-19   
256-320 2 Sheffield AL HNVIALUNX0X  5255 LEVEL 3 COMMUNICATIONS, LLC - AL 477   2003-09-20   
256-320 3 Sheffield AL HNVIAL03CM1  6664 SPRINT SPECTRUM, L.P. 477      
256-320 4 Sheffield AL HNVIAL180MD  7469 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL 477   2007-07-15   
256-320 5 Sheffield AL HNVIALUNX7Z  318J COMCAST IP PHONE LLC 477   2008-03-31   
256-320 6 Sheffield AL HNVIAL96X4X  7421 AT&T - LOCAL 477   2005-06-23   
256-320 7 Sheffield AL HNVIALUNX7Z  318J COMCAST IP PHONE LLC 477   2013-10-24   
256-320 8 Sheffield AL HNVIAL03CM1  6664 SPRINT SPECTRUM, L.P. 477   2006-12-30   
256-320 9 Sheffield AL HNVIAL03CM1  6664 SPRINT SPECTRUM, L.P. 477      

Last updated: Thu, 04 Aug 2022 23:14:42 UTC

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