Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 821 [Rate centres in NPA 821] [Dial plan for NPA 821]

NXX: 777

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
821-777 A Anderson SC   548E ONVOY, LLC - SC 430   2025-03-13   
821-777 0 Anderson SC   548E ONVOY, LLC - SC 430   2025-03-13   
821-777 1 Anderson SC   6398 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 430   2025-03-29   
821-777 2 Anderson SC   8645 SUNCOM DBA T-MOBILE USA 430   2025-07-26   
821-777 3 Anderson SC   8645 SUNCOM DBA T-MOBILE USA 430   2025-09-04   
821-777 4 Anderson SC   8645 SUNCOM DBA T-MOBILE USA 430   2025-09-04   
821-777 5 Anderson SC   8645 SUNCOM DBA T-MOBILE USA 430   2025-10-09   
821-777 6 Anderson SC   8645 SUNCOM DBA T-MOBILE USA 430   2026-01-06   
821-777 7 Anderson SC   548E ONVOY, LLC - SC 430   2025-03-13   
821-777 8 Anderson SC   6398 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 430   2025-05-19   
821-777 9 Anderson SC   6398 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 430   2025-07-14   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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