Local Calling Guide

Area code/prefix search

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Waterloo, MD

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
667-374 9 BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2022-02-11   

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Last updated: Sun, 01 Jun 2025 02:18:11 UTC

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