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.

Switch: STNGMABRRS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
978-422 A Sterling MA 9102 VERIZON NEW ENGLAND INC. 128      
978-422 0 Sterling MA 9102 VERIZON NEW ENGLAND INC. 128      
978-422 2 Sterling MA 9102 VERIZON NEW ENGLAND INC. 128      
978-422 3 Sterling MA 9102 VERIZON NEW ENGLAND INC. 128      
978-422 5 Sterling MA 9102 VERIZON NEW ENGLAND INC. 128      
978-422 6 Sterling MA 9102 VERIZON NEW ENGLAND INC. 128      
978-422 7 Sterling MA 9102 VERIZON NEW ENGLAND INC. 128      
978-422 8 Sterling MA 9102 VERIZON NEW ENGLAND INC. 128      
978-422 9 Sterling MA 9102 VERIZON NEW ENGLAND INC. 128      

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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