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: 219 [Rate centres in NPA 219] [Dial plan for NPA 219]

NXX: 437

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
219-437 A La Porte IN   671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 332   2026-11-17   
219-437 5 La Porte IN   671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 332   2026-11-17   

Last updated: Tue, 29 Sep 2026 03:00:13 UTC

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