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: 518

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-518 A Waldorf MD ARTNVAARXKY  732J NUSO, LLC 236      
240-518 0 Waldorf MD   568G PEERLESS NETWORK OF MARYLAND, LLC 236   2023-07-24   
240-518 1 Waldorf MD   732J NUSO, LLC 236   2022-10-30   
240-518 2 Waldorf MD   876D ONVOY, LLC - MD 236   2022-12-15   
240-518 3 Waldorf MD   876D ONVOY, LLC - MD 236   2022-12-15   
240-518 4 Waldorf MD   876D ONVOY, LLC - MD 236   2023-06-17   
240-518 5 Waldorf MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-02-07   
240-518 6 Waldorf MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2023-02-21   
240-518 7 Waldorf MD   876D ONVOY, LLC - MD 236   2023-06-17   
240-518 8 Waldorf MD   318J COMCAST IP PHONE, LLC 236   2012-11-10   
240-518 9 Waldorf MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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