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.

Hillsboro, MD

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
410-364 A HLBOMDTKRS0  9212 VERIZON MARYLAND, INC. 242      
410-364 0   2593 CORE COMMUNICATIONS, INC.- MD 242      
410-364 1   624H ONVOY SPECTRUM, LLC 242      
410-364 2   624H ONVOY SPECTRUM, LLC 242      
410-364 3 ESTNMDESMMD  228C IDT AMERICA, CORP. - MD 242      
410-364 4 SLBRMDSBXVX  876D ONVOY, LLC - MD 242      
410-364 5 HLBOMDTKRS0  9212 VERIZON MARYLAND, INC. 242      
410-364 6   145J TERRA NOVA TELECOM INC. 242      
410-364 7 SLBRMDSBXLX  318J COMCAST IP PHONE, LLC 242      
410-364 8 SLBRMD902MD  073H TELNYX LLC 242      
410-364 9 HLBOMDTKRS0  9212 VERIZON MARYLAND, INC. 242      
667-255 A SLBRMDSBXVX  876D ONVOY, LLC - MD 242      
667-255 0 SLBRMDSBXVX  876D ONVOY, LLC - MD 242      
667-255 1 SLBRMDSBXVX  876D ONVOY, LLC - MD 242      
667-255 2 SLBRMDSBXVX  876D ONVOY, LLC - MD 242      
667-255 3   2593 CORE COMMUNICATIONS, INC.- MD 242      
667-255 4   2593 CORE COMMUNICATIONS, INC.- MD 242      
667-255 6   2593 CORE COMMUNICATIONS, INC.- MD 242      
667-255 8 SLBRMDSBXVX  876D ONVOY, LLC - MD 242      
667-255 9   2593 CORE COMMUNICATIONS, INC.- MD 242      
667-665 A SLBRMDSBX0X  624H ONVOY SPECTRUM, LLC 242      
667-665 0 SLBRMDSBWMD  073H TELNYX LLC 242      
667-665 2 SLBRMDSBXVX  876D ONVOY, LLC - MD 242      
667-665 3 SLBRMD90BMD  516J TON80 COMMUNICATIONS, LLC 242      
667-665 4 SLBRMDSBX0X  624H ONVOY SPECTRUM, LLC 242      
667-665 5 SLBRMDSBX0X  624H ONVOY SPECTRUM, LLC 242      
667-665 6 SLBRMDSBX0X  624H ONVOY SPECTRUM, LLC 242      

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.