Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 410 [Rate centres in NPA 410] [Dial plan for NPA 410]

NXX: 312

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
410-312 A Columbia MD CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
410-312 0 Columbia MD CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
410-312 1 Columbia MD CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
410-312 2 Columbia MD CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
410-312 3 Columbia MD CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
410-312 4 Columbia MD CLMAMDSRRS0  9212 VERIZON MARYLAND, INC. 238      
410-312 5 Columbia MD CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      
410-312 6 Columbia MD CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      
410-312 7 Columbia MD CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      
410-312 8 Columbia MD CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      
410-312 9 Columbia MD CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.