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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Switch: HLDNMAHORS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
508-829 A Holden MA 9102 VERIZON NEW ENGLAND INC. 128      
774-345 A Holden MA 9102 VERIZON NEW ENGLAND INC. 128      
774-345 1 Holden MA 9102 VERIZON NEW ENGLAND INC. 128   2006-10-20   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

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