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: CMBRMABE5MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
857-346 1 Boston MA 551G NUSO, LLC 128      
857-347 2 Boston MA 551G NUSO, LLC 128      
857-348 2 Boston MA 551G NUSO, LLC 128      
857-409 4 Boston MA 551G NUSO, LLC 128      
857-409 5 Boston MA 551G NUSO, LLC 128      
857-702 A Boston MA 551G NUSO, LLC 128      
857-702 1 Boston MA 551G NUSO, LLC 128      
857-763 1 Boston MA 551G NUSO, LLC 128      
857-763 2 Boston MA 551G NUSO, LLC 128      
857-763 3 Boston MA 551G NUSO, LLC 128      
857-763 4 Boston MA 551G NUSO, LLC 128      
857-763 5 Boston MA 551G NUSO, LLC 128      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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