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.

OCN: 420C ARMSTRONG TELECOMMUNICATIONS, INC. - MD

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
410-214 2 Rising Sun MD BLTMMDCH47Z  238      
410-441 8 Elkton MD BLTMMDCH47Z  238      
410-457 8 Darlington MD BLTMMDCH47Z  238      
410-656 A North East MD BLTMMDCH47Z  238      
410-656 0 North East MD BLTMMDCH47Z  238      
410-692 4 Jarrettsville MD BLTMMDCH47Z  238      
410-734 8 Churchville MD BLTMMDCH47Z  238      
443-424 0 Cardiff MD BLTMMDCH47Z  238      
443-640 6 Bel Air MD BLTMMDCH47Z  238      
443-686 3 Fallston MD BLTMMDCH47Z  238      
443-731 1 Port Deposit MD BLTMMDCH47Z  238      

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.