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.

Switch: MRKKMDMKDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
240-264 A Laurel MD 9212 VERIZON MARYLAND, INC. 236      
240-264 1 Laurel MD 9212 VERIZON MARYLAND, INC. 236      
240-264 3 Laurel MD 9212 VERIZON MARYLAND, INC. 236      
240-264 8 Laurel MD 9212 VERIZON MARYLAND, INC. 236      
240-581 6 Laurel MD 9212 VERIZON MARYLAND, INC. 236   2008-07-21   
240-581 7 Laurel MD 9212 VERIZON MARYLAND, INC. 236   2008-07-21   
240-583 A Laurel MD 9212 VERIZON MARYLAND, INC. 236      
240-583 3 Laurel MD 9212 VERIZON MARYLAND, INC. 236   2010-06-12   
240-583 4 Laurel MD 9212 VERIZON MARYLAND, INC. 236   2010-06-12   
240-583 5 Laurel MD 9212 VERIZON MARYLAND, INC. 236   2010-06-12   
240-583 6 Laurel MD 9212 VERIZON MARYLAND, INC. 236   2010-06-12   
301-210 A Laurel MD 9212 VERIZON MARYLAND, INC. 236      
301-419 A Washington Zone 13 MD 9212 VERIZON MARYLAND, INC. 236      
301-425 A Washington Zone 13 MD 9212 VERIZON MARYLAND, INC. 236      
301-426 A Washington Zone 13 MD 9212 VERIZON MARYLAND, INC. 236      
301-426 0 Washington Zone 13 MD 9212 VERIZON MARYLAND, INC. 236      
301-426 1 Washington Zone 13 MD 9212 VERIZON MARYLAND, INC. 236      
301-426 2 Washington Zone 13 MD 9212 VERIZON MARYLAND, INC. 236      
301-426 3 Washington Zone 13 MD 9212 VERIZON MARYLAND, INC. 236      
301-426 4 Washington Zone 13 MD 9212 VERIZON MARYLAND, INC. 236      
301-426 5 Washington Zone 13 MD 9212 VERIZON MARYLAND, INC. 236      
301-426 7 Washington Zone 13 MD 9212 VERIZON MARYLAND, INC. 236      
301-426 8 Washington Zone 13 MD 9212 VERIZON MARYLAND, INC. 236      
301-426 9 Washington Zone 13 MD 9212 VERIZON MARYLAND, INC. 236      
301-566 A Washington Zone 13 MD 9212 VERIZON MARYLAND, INC. 236      
301-716 A Washington Zone 13 MD 9212 VERIZON MARYLAND, INC. 236      
410-606 A Waterloo (Washington DC LATA) MD 9212 VERIZON MARYLAND, INC. 236      
410-722 A Waterloo (Washington DC LATA) MD 9212 VERIZON MARYLAND, INC. 236      
410-738 A Waterloo (Washington DC LATA) MD 9212 VERIZON MARYLAND, INC. 236      
410-791 A Waterloo (Washington DC LATA) MD 9212 VERIZON MARYLAND, INC. 236      
410-813 A Waterloo (Washington DC LATA) MD 9212 VERIZON MARYLAND, INC. 236      
410-815 A Waterloo (Washington DC LATA) MD 9212 VERIZON MARYLAND, INC. 236      
410-898 A Waterloo (Washington DC LATA) MD 9212 VERIZON MARYLAND, INC. 236      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.