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: BLTMMDWLDS0

Remotes:

Switch Switch name Switch type
BLTMMDKMRS0  BALTIMORE KEY MEDICAL  5ER 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
410-276 A Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-327 A Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-342 A Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-502 A Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-522 A Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-522 0 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-522 1 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-522 2 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-522 3 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-522 4 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-522 5 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-522 6 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-522 7 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-522 9 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-534 A Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-534 0 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-534 1 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-534 2 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-534 3 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-534 4 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-534 5 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-534 6 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-534 7 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-534 8 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-537 A Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-537 1 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-537 2 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-537 3 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-537 4 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-537 5 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-537 6 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-537 7 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-537 8 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-558 A Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-558 0 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-558 1 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-558 2 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-558 3 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-558 4 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-563 A Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-614 A Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-675 A Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-732 A Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-955 A Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
443-287 A Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
443-455 A Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
443-455 5 Baltimore MD 9212 VERIZON MARYLAND, INC. 238   2006-06-14   
443-455 6 Baltimore MD 9212 VERIZON MARYLAND, INC. 238   2006-06-19   
443-455 8 Baltimore MD 9212 VERIZON MARYLAND, INC. 238   2006-06-14   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.