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: FRMNMAUNCMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
351-200 A Ashby MA 7135 TC SYSTEMS, INC. 128      
351-200 6 Ashby MA 7135 TC SYSTEMS, INC. 128   2018-08-24   
351-247 A Lunenburg MA 7135 TC SYSTEMS, INC. 128      
351-247 6 Lunenburg MA 7135 TC SYSTEMS, INC. 128   2019-05-26   
774-378 A Wrentham MA 7135 TC SYSTEMS, INC. 128      
774-378 6 Wrentham MA 7135 TC SYSTEMS, INC. 128   2018-11-22   

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

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