Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 605 [Rate centres in NPA 605] [Dial plan for NPA 605]

NXX: 508

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
605-508 A Rapid City SD RPCYSDCOFMD  6701 AERIAL COMMUNICATIONS, INC. 640   2025-12-27   
605-508 1 Rapid City SD SXFLSDCOX9X  6569 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 640   2026-01-01   
605-508 2 Rapid City SD RPCYSDIPGT0  7076 MIDCONTINENT COMMUNICATIONS. - SD 640   2026-02-27   
605-508 3 Rapid City SD RPCYSDIPGT0  7076 MIDCONTINENT COMMUNICATIONS. - SD 640   2026-02-27   
605-508 4 Rapid City SD RPCYSDIPGT0  7076 MIDCONTINENT COMMUNICATIONS. - SD 640   2026-02-27   
605-508 6 Rapid City SD RPCYSDIPGT0  7076 MIDCONTINENT COMMUNICATIONS. - SD 640   2026-02-27   
605-508 7 Rapid City SD RPCYSDIPGT0  7076 MIDCONTINENT COMMUNICATIONS. - SD 640   2026-02-27   
605-508 9 Rapid City SD RPCYSDCOFMD  6701 AERIAL COMMUNICATIONS, INC. 640   2025-12-27   

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

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