Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
301-250 9 Gaithersburg MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-256 A Laurel MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-256 3 Laurel MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-256 9 Laurel MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-263 6 Washington Zone 2 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2005-08-15   
301-263 7 Washington Zone 2 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2005-08-15   
301-272 A Washington Zone 2 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-272 1 Washington Zone 2 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-272 2 Washington Zone 2 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-272 3 Washington Zone 2 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-272 6 Washington Zone 2 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-272 8 Washington Zone 2 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-272 9 Washington Zone 2 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-273 A Washington Zone 3 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-273 0 Washington Zone 3 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-273 2 Washington Zone 3 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-273 9 Washington Zone 3 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-276 A Washington Zone 4 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-276 2 Washington Zone 4 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-276 6 Washington Zone 4 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-276 9 Washington Zone 4 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-278 A Washington Zone 5 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-278 9 Washington Zone 5 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-281 A Washington Zone 6 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-281 2 Washington Zone 6 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-281 9 Washington Zone 6 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-284 A Washington Zone 10 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-284 1 Washington Zone 10 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-284 2 Washington Zone 10 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-284 5 Washington Zone 10 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-284 6 Washington Zone 10 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-284 7 Washington Zone 10 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-284 9 Washington Zone 10 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-287 A Washington Zone 11 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-287 0 Washington Zone 11 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-287 2 Washington Zone 11 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-287 3 Washington Zone 11 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-287 9 Washington Zone 11 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-288 A Washington Zone 12 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-288 9 Washington Zone 12 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-289 A Washington Zone 13 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-289 3 Washington Zone 13 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-289 9 Washington Zone 13 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-291 A Washington Zone 14 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-291 9 Washington Zone 14 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-296 A Washington Zone 10 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-296 0 Washington Zone 10 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-296 1 Washington Zone 10 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-296 2 Washington Zone 10 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-296 3 Washington Zone 10 MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      

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Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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