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: CHCHMDBE6MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
240-235 A Washington Zone 2 MD 4716 PAETEC COMMUNICATIONS, INC. - MD 236      
240-238 A Washington Zone 10 MD 4716 PAETEC COMMUNICATIONS, INC. - MD 236      
240-283 A Washington Zone 11 MD 4716 PAETEC COMMUNICATIONS, INC. - MD 236      
240-454 A Gaithersburg MD 4716 PAETEC COMMUNICATIONS, INC. - MD 236      
240-556 A Washington Zone 14 MD 4716 PAETEC COMMUNICATIONS, INC. - MD 236      
240-965 A Washington Zone 13 MD 4716 PAETEC COMMUNICATIONS, INC. - MD 236      
301-314 A Washington Zone 4 MD 4716 PAETEC COMMUNICATIONS, INC. - MD 236      
301-405 A Washington Zone 4 MD 4716 PAETEC COMMUNICATIONS, INC. - MD 236      
301-560 A Washington Zone 4 MD 4716 PAETEC COMMUNICATIONS, INC. - MD 236      
301-576 A Washington Zone 3 MD 4716 PAETEC COMMUNICATIONS, INC. - MD 236      
301-591 A Gaithersburg MD 4716 PAETEC COMMUNICATIONS, INC. - MD 236      

Last updated: Sun, 10 Nov 2019 13:49:34 UTC

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