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.

NPA: 240 [Rate centres in NPA 240] [Dial plan for NPA 240]

NXX: 646

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-646 A Laurel MD   829J PAETEC ITEL, LLC 236   2025-04-02   
240-646 0 Laurel MD   829J PAETEC ITEL, LLC 236      
240-646 1 Laurel MD   829J PAETEC ITEL, LLC 236      
240-646 2 Laurel MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2008-07-17   
240-646 3 Laurel MD   829J PAETEC ITEL, LLC 236      
240-646 4 Laurel MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2009-12-21   
240-646 5 Laurel MD   829J PAETEC ITEL, LLC 236      
240-646 6 Laurel MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2009-12-21   
240-646 7 Laurel MD   829J PAETEC ITEL, LLC 236      
240-646 8 Laurel MD   829J PAETEC ITEL, LLC 236      
240-646 9 Laurel MD   829J PAETEC ITEL, LLC 236      

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.