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.
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Switch: WASHDCSWXCY

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
240-554 6 Laurel MD 4716 PAETEC COMMUNICATIONS, INC. - MD 236      
240-577 7 Leonardtown MD 4716 PAETEC COMMUNICATIONS, INC. - MD 236      
240-581 A Laurel MD 4989 PAETEC COMMUNICATIONS, INC. - DC 236      

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

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