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: 621

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
410-621 A Princess Anne MD PRANMDPARS1  9212 VERIZON MARYLAND, INC. 242      
410-621 0 Princess Anne MD PRANMDPARS1  9212 VERIZON MARYLAND, INC. 242      
410-621 1 Princess Anne MD PRANMDPARS1  9212 VERIZON MARYLAND, INC. 242      
410-621 2 Princess Anne MD PRANMDPARS1  9212 VERIZON MARYLAND, INC. 242      
410-621 3 Princess Anne MD PRANMDPARS1  9212 VERIZON MARYLAND, INC. 242      
410-621 4 Princess Anne MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242      
410-621 5 Princess Anne MD SLBRMDSBXLX  318J COMCAST IP PHONE, LLC 242      
410-621 6 Princess Anne MD   145J TERRA NOVA TELECOM INC. 242      
410-621 7 Princess Anne MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242      
410-621 8 Princess Anne MD SLBRMDSB8MD  2589 US LEC OF MARYLAND, INC. 242      
410-621 9 Princess Anne MD ESTNMDES5MD  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 242      

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.