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.

NPA: 443 [Rate centres in NPA 443] [Dial plan for NPA 443]

NXX: 998

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-998 A Parkville MD PKVLMDPKDS0  9212 VERIZON MARYLAND, INC. 238      
443-998 0 Parkville MD   9212 VERIZON MARYLAND, INC. 238      
443-998 1 Parkville MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2016-12-09   
443-998 2 Parkville MD   876D ONVOY, LLC - MD 238   2024-02-23   
443-998 3 Parkville MD   145J TERRA NOVA TELECOM INC. 238   2024-02-15   
443-998 4 Parkville MD   876D ONVOY, LLC - MD 238   2024-02-23   
443-998 5 Parkville MD   876D ONVOY, LLC - MD 238   2024-02-23   
443-998 6 Parkville MD   876D ONVOY, LLC - MD 238   2024-02-23   
443-998 7 Parkville MD   876D ONVOY, LLC - MD 238   2016-01-11   
443-998 8 Parkville MD   876D ONVOY, LLC - MD 238   2014-12-31   
443-998 9 Parkville MD   876D ONVOY, LLC - MD 238   2014-12-31   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.