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: CMBRMABEXBX

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
339-233 A Bryantville MA 732J NUSO, LLC 128      
339-233 1 Bryantville MA 732J NUSO, LLC 128   2022-09-08   
339-239 1 Bryantville MA 732J NUSO, LLC 128   2024-10-31   
508-661 3 Framingham MA 732J NUSO, LLC 128   2024-08-18   
774-374 7 Marlboro MA 732J NUSO, LLC 128   2024-07-09   
774-505 4 Framingham MA 732J NUSO, LLC 128   2024-05-27   
774-522 2 Framingham MA 732J NUSO, LLC 128   2024-08-18   
978-571 4 Westminster MA 732J NUSO, LLC 128   2024-05-27   
978-684 4 Andover MA 732J NUSO, LLC 128   2024-10-28   

Last updated: Sat, 15 Nov 2025 03:38:44 UTC

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