Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 321 [Rate centres in NPA 321] [Dial plan for NPA 321]

NXX: 999

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
321-999 A Sanford FL ORLDFLMAYEX  899D METROPCS NETWORKS, LLC 45806      
321-999 0 Sanford FL   937C ONVOY, LLC - FL 45806   2012-06-07   
321-999 1 Sanford FL   982E BANDWIDTH.COM CLEC, LLC - FL 45806   2016-08-18   
321-999 2 Sanford FL   982E BANDWIDTH.COM CLEC, LLC - FL 45806   2016-08-18   
321-999 3 Sanford FL   937C ONVOY, LLC - FL 45806   2012-06-07   
321-999 4 Sanford FL   899D METROPCS NETWORKS, LLC 45806   2016-12-24   
321-999 5 Sanford FL   899D METROPCS NETWORKS, LLC 45806   2016-12-24   
321-999 6 Sanford FL   937C ONVOY, LLC - FL 45806   2012-06-07   
321-999 7 Sanford FL   937C ONVOY, LLC - FL 45806   2018-11-30   
321-999 8 Sanford FL   937C ONVOY, LLC - FL 45806   2012-06-07   
321-999 9 Sanford FL   937C ONVOY, LLC - FL 45806   2016-02-05   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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