Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 301 [Rate centres in NPA 301] [Dial plan for NPA 301]

NXX: 414

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
301-414 A Damascus MD DMSCMDDERP0  9212 VERIZON MARYLAND, INC. 236      
301-414 0 Damascus MD   9212 VERIZON MARYLAND, INC. 236      
301-414 1 Damascus MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2019-07-17   
301-414 2 Damascus MD   9212 VERIZON MARYLAND, INC. 236      
301-414 3 Damascus MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2019-07-17   
301-414 4 Damascus MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2019-07-17   
301-414 5 Damascus MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2019-04-29   
301-414 6 Damascus MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-22   
301-414 7 Damascus MD   9212 VERIZON MARYLAND, INC. 236      
301-414 8 Damascus MD   876D ONVOY, LLC - MD 236   2016-03-11   
301-414 9 Damascus MD   9212 VERIZON MARYLAND, INC. 236      

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

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