Local Calling Guide

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Search area code/prefix (NPA/NXX)
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NPA: 443 [Rate centres in NPA 443] [Dial plan for NPA 443]

NXX:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-259 A Columbia MD CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      
443-259 0 Columbia MD   9212 VERIZON MARYLAND, INC. 238      
443-259 1 Columbia MD   9212 VERIZON MARYLAND, INC. 238      
443-259 2 Columbia MD   9212 VERIZON MARYLAND, INC. 238      
443-259 3 Columbia MD   9212 VERIZON MARYLAND, INC. 238      
443-259 4 Columbia MD   9212 VERIZON MARYLAND, INC. 238      
443-259 5 Columbia MD   2589 US LEC OF MARYLAND, INC. 238   2013-09-05   
443-259 6 Columbia MD   9212 VERIZON MARYLAND, INC. 238      
443-259 7 Columbia MD   9212 VERIZON MARYLAND, INC. 238      
443-259 8 Columbia MD   9212 VERIZON MARYLAND, INC. 238      
443-259 9 Columbia MD   1958 ATX TELECOMMUNICATIONS SERVICES, LTD 238   2003-02-25   

Last updated: Sun, 10 Nov 2019 13:49:34 UTC

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