Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 517 [Rate centres in NPA 517] [Dial plan for NPA 517]

NXX: 733

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
517-733 A Addison MI LNNGMIDCDMD  516J TON80 COMMUNICATIONS, LLC 346      
517-733 0 Addison MI LNNGMIMN00Z  624H ONVOY SPECTRUM, LLC 346   2024-04-21   
517-733 3 Addison MI LNNGMIDCDMD  516J TON80 COMMUNICATIONS, LLC 346   2022-04-23   
517-733 7 Addison MI   145J TERRA NOVA TELECOM INC. 346   2025-07-10   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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