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: 584

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-584 A Laurel MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-584 0 Laurel MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2018-03-14   
240-584 1 Laurel MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2018-12-07   
240-584 2 Laurel MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2018-09-20   
240-584 3 Laurel MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2018-10-22   
240-584 4 Laurel MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2018-08-11   
240-584 5 Laurel MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2018-08-11   
240-584 6 Laurel MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2018-08-11   
240-584 7 Laurel MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2018-12-09   
240-584 8 Laurel MD   5562 METRO PCS, INC. 236   2018-12-31   
240-584 9 Laurel MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2018-02-25   

Last updated: Sun, 04 Apr 2021 19:28:27 UTC

Sponsored by: VoiceMeUp - Corporate VoIP Services

Like this site? We accept donations via PayPal.