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.
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OCN: 1684 UNION TEL. CO. DBA GOLDEN WEST TELECOMMUNICATIONS

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
605-526 A Hartford SD DLRPSDXA1MD  640      
605-528 A Hartford SD DLRPSDXA1MD  640      
605-528 0 Hartford SD DLRPSDXA1MD  640      
605-528 2 Hartford SD DLRPSDXA1MD  640      
605-528 3 Hartford SD DLRPSDXA1MD  640      
605-528 4 Hartford SD DLRPSDXA1MD  640      
605-528 5 Hartford SD DLRPSDXA1MD  640      
605-528 6 Hartford SD DLRPSDXA1MD  640      
605-528 7 Hartford SD DLRPSDXA1MD  640      
605-528 8 Hartford SD DLRPSDXA1MD  640      
605-528 9 Hartford SD DLRPSDXA1MD  640      

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

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