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: 642

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-642 A Washington Zone 10 MD VINNVACB7MD  181J ADVANCED TELECOM SOLUTIONS, LLC 236      
240-642 0 Washington Zone 10 MD VINNVACB7MD  181J ADVANCED TELECOM SOLUTIONS, LLC 236   2018-09-16   
240-642 1 Washington Zone 10 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2020-10-31   
240-642 2 Washington Zone 10 MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2019-04-29   
240-642 3 Washington Zone 10 MD SLSPMD91DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 236   2019-11-17   
240-642 4 Washington Zone 10 MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2019-04-29   
240-642 5 Washington Zone 10 MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2019-04-29   
240-642 6 Washington Zone 10 MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2019-04-29   
240-642 7 Washington Zone 10 MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2019-04-29   
240-642 8 Washington Zone 10 MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2019-02-21   
240-642 9 Washington Zone 10 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2020-10-31   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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