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.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

OCN: 2522 ADVANCED TELEPHONE SYS INC DBA HTC COMMUNICATIONS

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
412-706 A Pittsburgh Suburban Zone 14 PA HCKRPAXHDS2  234      
412-706 6 Pittsburgh Suburban Zone 14 PA HCKRPAXHDS2  234      
412-839 A Pittsburgh Suburban Zone 13 PA HCKRPAXHDS2  234      
412-839 6 Pittsburgh Suburban Zone 13 PA HCKRPAXHDS2  234      
412-850 A Pittsburgh Suburban Zone 19 PA HCKRPAXHDS2  234      
412-850 6 Pittsburgh Suburban Zone 19 PA HCKRPAXHDS2  234      
724-507 A Avella PA HCKRPAXHDS2  234      
724-507 0 Avella PA   234      
724-507 1 Avella PA   234      
724-507 2 Avella PA   234      
724-507 3 Avella PA   234      
724-507 4 Avella PA   234      
724-507 5 Avella PA   234      
724-507 6 Avella PA HCKRPAXHDS2  234      
724-507 7 Avella PA   234      
724-507 8 Avella PA   234      
724-507 9 Avella PA   234      
724-701 A Burgettstown PA HCKRPAXHDS2  234      
724-701 6 Burgettstown PA HCKRPAXHDS2  234      
724-760 A Canonsburg PA HCKRPAXHDS2  234      
724-760 6 Canonsburg PA HCKRPAXHDS2  234      
724-795 A Buffalo PA HCKRPAXHDS2  234      
724-795 6 Buffalo PA HCKRPAXHDS2  234      
724-821 A McDonald PA HCKRPAXHDS2  234      
724-821 1 McDonald PA HCKRPAXHDS2  234      
724-821 6 McDonald PA HCKRPAXHDS2  234      
724-928 A Oakdale (Allegheny) PA HCKRPAXHDS2  234      
724-928 1 Oakdale (Allegheny) PA HCKRPAXHDS2  234      
724-928 6 Oakdale (Allegheny) PA HCKRPAXHDS2  234      
724-993 A Washington PA HCKRPAXHDS2  234      
724-993 1 Washington PA HCKRPAXHDS2  234      
724-993 6 Washington PA HCKRPAXHDS2  234      
878-291 A Taylorstown PA KCBGPAXKDS1  234      
878-291 6 Taylorstown PA KCBGPAXKDS1  234   2023-12-29   

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

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