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: 301 [Rate centres in NPA 301] [Dial plan for NPA 301]

NXX:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
301-373 A Leonardtown MD HLWDMDHWRS0  9212 VERIZON MARYLAND, INC. 236      
301-373 0 Leonardtown MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2011-07-15   
301-373 1 Leonardtown MD   087F CBEYOND COMMUNICATIONS, LLC - MD 236   2008-10-05   
301-373 2 Leonardtown MD   9212 VERIZON MARYLAND, INC. 236      
301-373 3 Leonardtown MD   9212 VERIZON MARYLAND, INC. 236      
301-373 4 Leonardtown MD   9212 VERIZON MARYLAND, INC. 236      
301-373 5 Leonardtown MD   9212 VERIZON MARYLAND, INC. 236      
301-373 6 Leonardtown MD   9212 VERIZON MARYLAND, INC. 236      
301-373 7 Leonardtown MD   9212 VERIZON MARYLAND, INC. 236      
301-373 8 Leonardtown MD   9212 VERIZON MARYLAND, INC. 236      
301-373 9 Leonardtown MD   9212 VERIZON MARYLAND, INC. 236      

Last updated: Sat, 29 Jun 2019 02:32:58 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.