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: 236

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-236 A Frederick MD FRDRMDFRDS1  9212 VERIZON MARYLAND, INC. 240      
240-236 0 Frederick MD   9212 VERIZON MARYLAND, INC. 240      
240-236 1 Frederick MD   9212 VERIZON MARYLAND, INC. 240      
240-236 2 Frederick MD   9212 VERIZON MARYLAND, INC. 240      
240-236 3 Frederick MD   9212 VERIZON MARYLAND, INC. 240      
240-236 4 Frederick MD   9212 VERIZON MARYLAND, INC. 240      
240-236 5 Frederick MD   9212 VERIZON MARYLAND, INC. 240      
240-236 6 Frederick MD   9212 VERIZON MARYLAND, INC. 240   2002-06-20   
240-236 7 Frederick MD   9212 VERIZON MARYLAND, INC. 240      
240-236 8 Frederick MD   9212 VERIZON MARYLAND, INC. 240      
240-236 9 Frederick MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240   2015-02-06   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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