Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Switch: CHLONN01DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
670-488 A Tinian MP 4974 GUAM WIRELESS TELEPHONE COMPANY, LLC 870      

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

Sponsored by: ISP Telecom

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