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: BLARMDBLDS0

Remotes:

Switch Switch name Switch type
CCVLMDCHRS0  CHURCHVILLE  5ER 
CRDFMDCDRS0  CARDIFF  5ER 
DRTNMDDRRS0  DARLINGTON  5ER 
JRVLMDJERS0  JARRETTSVILLE  ORM 
WNRNMDWNRS1  WINTERS RUN  DS 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
410-420 A Bel Air MD 9212 VERIZON MARYLAND, INC. 238      
410-588 A Bel Air MD 9212 VERIZON MARYLAND, INC. 238      
410-638 A Bel Air MD 9212 VERIZON MARYLAND, INC. 238      
410-803 A Fork MD 9212 VERIZON MARYLAND, INC. 238      
410-836 A Bel Air MD 9212 VERIZON MARYLAND, INC. 238      
410-838 A Bel Air MD 9212 VERIZON MARYLAND, INC. 238      
410-877 A Fallston MD 9212 VERIZON MARYLAND, INC. 238      
410-879 A Fork MD 9212 VERIZON MARYLAND, INC. 238      
410-893 A Fork MD 9212 VERIZON MARYLAND, INC. 238      
443-643 A Bel Air MD 9212 VERIZON MARYLAND, INC. 238      

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.