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: 748

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-748 A Millersville MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-748 0 Millersville MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-748 1 Millersville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-748 2 Millersville MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238      
443-748 3 Millersville MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-748 4 Millersville MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238      
443-748 5 Millersville MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238      
443-748 6 Millersville MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-748 7 Millersville MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-748 9 Millersville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.