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: 746

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-746 A Brandywine MD WASHDCSWDS8  7421 AT&T - LOCAL 236      
240-746 0 Brandywine MD   876D ONVOY, LLC - MD 236   2025-10-12   
240-746 1 Brandywine MD   071F BANDWIDTH.COM CLEC, LLC - MD 236   2021-07-19   
240-746 2 Brandywine MD   071F BANDWIDTH.COM CLEC, LLC - MD 236   2021-07-19   
240-746 3 Brandywine MD   516J TON80 COMMUNICATIONS, LLC 236   2021-09-04   
240-746 4 Brandywine MD   624H ONVOY SPECTRUM, LLC 236   2021-05-21   
240-746 5 Brandywine MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-09-16   
240-746 6 Brandywine MD   876D ONVOY, LLC - MD 236   2021-04-02   
240-746 7 Brandywine MD   876D ONVOY, LLC - MD 236   2021-04-02   
240-746 8 Brandywine MD   876D ONVOY, LLC - MD 236   2021-04-02   
240-746 9 Brandywine MD   7421 AT&T - LOCAL 236   2021-02-04   

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

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