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: 4434 DELL TEL. CORP. INC. - TX

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
915-828 A Guadalupe Peak TX DLCYTXXADS0  540      
915-964 A Dell City TX DLCYTXXADS0  540      
915-986 A Mile High TX DLCYTXXADS0  540      
915-988 A Desert Haven TX DLCYTXXADS0  540      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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