Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 240 [Rate centres in NPA 240] [Dial plan for NPA 240]

NXX: 573

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-573 A Washington Zone 15 MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-573 2 Washington Zone 15 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2012-04-05   
240-573 6 Washington Zone 15 MD BTVLMD12CMA  5562 METROPCS, INC. 236   2014-12-29   
240-573 7 Washington Zone 15 MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2012-06-09   
240-573 8 Washington Zone 15 MD BTVLMD12CMA  5562 METROPCS, INC. 236   2014-12-29   
240-573 9 Washington Zone 15 MD   515J IP HORIZON LLC 236   2016-05-31   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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