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: MNCHNHCO22Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
603-200 9 Newmarket NH 073H TELNYX LLC 122   2023-02-03   
603-347 7 Kingston NH 073H TELNYX LLC 122   2023-02-03   
603-384 9 Goffstown NH 073H TELNYX LLC 122   2023-02-03   
603-550 A Dover NH 073H TELNYX LLC 122      
603-550 7 Dover NH 073H TELNYX LLC 122   2022-04-03   
603-587 7 Candia NH 073H TELNYX LLC 122   2023-10-06   
603-678 7 Lebanon NH 073H TELNYX LLC 122   2023-02-03   
603-679 7 Epping NH 073H TELNYX LLC 122   2023-02-03   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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