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: 410 [Rate centres in NPA 410] [Dial plan for NPA 410]

NXX: 604

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
410-604 A Stevensville MD STVLMDSTRS1  9212 VERIZON MARYLAND, INC. 242      
410-604 0 Stevensville MD STVLMDSTRS1  9212 VERIZON MARYLAND, INC. 242      
410-604 1 Stevensville MD STVLMDSTRS1  9212 VERIZON MARYLAND, INC. 242      
410-604 2 Stevensville MD STVLMDSTRS1  9212 VERIZON MARYLAND, INC. 242      
410-604 3 Stevensville MD STVLMDSTRS1  9212 VERIZON MARYLAND, INC. 242      
410-604 4 Stevensville MD SLBRMD90DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 242   2018-03-07   
410-604 5 Stevensville MD   829J PAETEC ITEL, LLC 242   2010-01-18   
410-604 6 Stevensville MD STVLMDSTRS1  9212 VERIZON MARYLAND, INC. 242      
410-604 7 Stevensville MD SLBRMDSB8MD  2589 US LEC OF MARYLAND, INC. 242   2013-03-25   
410-604 8 Stevensville MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242   2022-11-24   
410-604 9 Stevensville MD SLBRMD902MD  073H TELNYX LLC 242   2017-09-13   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.