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: 234 [Rate centres in NPA 234] [Dial plan for NPA 234]

NXX: 534

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
234-534 A Northfield OH NRFDOHXAOMD  464C ONVOY, LLC - OH 320   2024-08-06   
234-534 5 Northfield OH   464C ONVOY, LLC - OH 320   2024-08-06   
234-534 6 Northfield OH   464C ONVOY, LLC - OH 320   2024-08-06   
234-534 7 Northfield OH   464C ONVOY, LLC - OH 320   2024-08-06   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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