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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Switch: WLVRMIMNRSA

NPA-NXX BLOCK Rate Centre Region OCN LATA Eff date Disc date Map
231-525 A Wolverine MI 9323 AMERITECH MICHIGAN 348     map

Last updated: Sat, 20 May 2017 02:06:00 UTC

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