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.

Switch: WASHDCINDS0

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
703-341 A Washington Zone 8 VA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
703-342 A Washington Zone 17 VA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
703-343 A Washington Zone 17 VA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
703-344 A Washington Zone 19 VA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
703-345 A Washington Zone 19 VA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
703-399 A Washington Zone 8 VA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
703-454 A Engleside VA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
703-459 A Washington Zone 19 VA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
703-462 A Washington Zone 17 VA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
703-480 A Herndon VA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
703-496 A Occoquan VA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
703-539 A Washington Zone 19 VA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
703-574 A Dulles VA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
703-586 A Dale City VA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
703-646 A Lorton VA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
703-828 A Braddock VA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
703-956 A Herndon VA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
703-962 A Washington Zone 17 VA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      

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

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