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: 637

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-637 A Washington Zone 3 MD CHCHMDBEPS0  2593 CORE COMMUNICATIONS, INC.- MD 236   2024-01-16   
240-637 0 Washington Zone 3 MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
240-637 1 Washington Zone 3 MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
240-637 2 Washington Zone 3 MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
240-637 3 Washington Zone 3 MD   2593 CORE COMMUNICATIONS, INC.- MD 236      
240-637 4 Washington Zone 3 MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-637 5 Washington Zone 3 MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-637 6 Washington Zone 3 MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-637 7 Washington Zone 3 MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-637 8 Washington Zone 3 MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-637 9 Washington Zone 3 MD   2593 CORE COMMUNICATIONS, INC.- MD 236      

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

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