Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 645 [Rate centres in NPA 645] [Dial plan for NPA 645]

NXX: 253

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
645-253 A Miami FL   671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 46017   2026-05-05   
645-253 7 Miami FL   671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 46017   2026-05-05   

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

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