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.

NPA: 645 [Rate centres in NPA 645] [Dial plan for NPA 645]

NXX: 254

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
645-254 A Miami FL   693K LIVEWIRE TELECOM, LLC 46017   2026-05-04   
645-254 8 Miami FL   693K LIVEWIRE TELECOM, LLC 46017   2026-05-04   
645-254 9 Miami FL   693K LIVEWIRE TELECOM, LLC 46017   2026-05-04   

Last updated: Sat, 21 Mar 2026 23:53:39 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.