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.
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NPA: 321 [Rate centres in NPA 321] [Dial plan for NPA 321]

NXX: 516

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
321-516 A Melbourne FL   515J IP HORIZON LLC 45806   2025-06-07   
321-516 1 Melbourne FL   515J IP HORIZON LLC 45806   2025-06-07   
321-516 2 Melbourne FL   515J IP HORIZON LLC 45806   2025-06-07   

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

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