Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 301 [Rate centres in NPA 301] [Dial plan for NPA 301]

NXX: 410

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
301-410 A Washington Zone 6 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236      
301-410 0 Washington Zone 6 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236      
301-410 1 Washington Zone 6 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236      
301-410 2 Washington Zone 6 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236      
301-410 3 Washington Zone 6 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236      
301-410 4 Washington Zone 6 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236      
301-410 5 Washington Zone 6 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236      
301-410 6 Washington Zone 6 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236      
301-410 7 Washington Zone 6 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236      
301-410 8 Washington Zone 6 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236      
301-410 9 Washington Zone 6 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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