Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Switch: RIO ILABRS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
309-972 A Rio IL 4624 ONEIDA NETWORK SERVICES, INC. 634      

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

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