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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OCN: 507J THE VOICE APPLICATION NETWORK, LLC

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
973-314 7 Millburn NJ NWRKNJ0202Z  224   2016-05-19   
973-840 0 Caldwell NJ NWRKNJ0202Z  224   2016-09-04   
973-840 4 Caldwell NJ NWRKNJ0202Z  224   2016-09-04   
973-840 5 Caldwell NJ NWRKNJ0202Z  224   2016-09-04   
973-924 6 Millburn NJ NWRKNJ0202Z  224   2016-05-19   
973-924 7 Millburn NJ NWRKNJ0202Z  224   2016-05-19   

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Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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