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: WDLWMDWLDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
301-954 A Washington Zone 4 MD 9212 VERIZON MARYLAND, INC. 236      
410-265 A Woodlawn MD 9212 VERIZON MARYLAND, INC. 238      
410-277 A Woodlawn MD 9212 VERIZON MARYLAND, INC. 238      
410-281 A Woodlawn MD 9212 VERIZON MARYLAND, INC. 238      
410-298 A Woodlawn MD 9212 VERIZON MARYLAND, INC. 238      
410-448 A Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-594 A Woodlawn MD 9212 VERIZON MARYLAND, INC. 238      
410-597 A Woodlawn MD 9212 VERIZON MARYLAND, INC. 238      
410-944 A Woodlawn MD 9212 VERIZON MARYLAND, INC. 238      
410-954 A Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-965 A Woodlawn MD 9212 VERIZON MARYLAND, INC. 238      
410-966 A Woodlawn MD 9212 VERIZON MARYLAND, INC. 238      
443-436 A Woodlawn MD 9212 VERIZON MARYLAND, INC. 238      
443-663 A Woodlawn MD 9212 VERIZON MARYLAND, INC. 238      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.