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.

Milford, NH

<< 1 2

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
603-801 9 MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      

<< 1 2

Last updated: Sat, 10 Oct 2026 15:24:20 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.