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.

OCN: 1958 ATX TELECOMMUNICATIONS SERVICES, LTD.

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
410-344 8 Chase MD BLTMMDCHAMD  238   2003-02-25   
410-399 3 Bel Air MD BLTMMDCHAMD  238   2003-03-11   
410-406 8 Essex MD BLTMMDCHAMD  238   2004-03-27   
410-414 6 Prince Frederick MD BLTMMDCHAMD  238   2004-03-27   
410-441 2 Elkton MD BLTMMDCHAMD  238   2003-02-26   
410-452 1 Cardiff MD BLTMMDCHAMD  238   2003-02-25   
410-457 1 Darlington MD BLTMMDCHAMD  238   2003-02-25   
410-489 8 Glenwood MD BLTMMDCHAMD  238   2003-02-26   
410-505 9 Ellicott City MD BLTMMDCHAMD  238   2004-03-27   
410-513 8 Parkville MD BLTMMDCHAMD  238   2004-03-27   
410-514 0 Severn MD BLTMMDCHAMD  238   2003-02-27   
410-609 8 Brooklyn Park-Linthicum MD BLTMMDCHAMD  238   2003-02-25   
410-616 8 Towson MD BLTMMDCHAMD  238   2003-02-27   
410-691 8 Glen Burnie MD BLTMMDCHAMD  238   2003-02-26   
410-697 8 Millersville MD BLTMMDCHAMD  238   2006-04-03   
410-698 0 Fork MD BLTMMDCHAMD  238   2003-02-26   
410-753 8 Pikesville MD BLTMMDCHAMD  238   2003-02-27   
410-782 4 Elkridge MD BLTMMDCHAMD  238   2003-02-25   
410-793 8 Severna Park MD BLTMMDCHAMD  238   2003-02-27   
410-861 4 Westminster MD BLTMMDCHAMD  238   2006-05-12   
410-874 2 Odenton MD BLTMMDCHAMD  238   2006-06-30   
410-875 8 Sykesville MD BLTMMDCHAMD  238   2004-03-27   
410-878 9 Baltimore MD BLTMMDCHAMD  238   2006-08-07   
410-907 8 Woodlawn MD BLTMMDCHAMD  238   2006-03-25   
410-940 A Annapolis MD PIVLMDPKQMD  238      
410-940 6 Annapolis MD PIVLMDPKQMD  238   2002-03-15   
410-942 2 Havre de Grace MD BLTMMDCHAMD  238   2004-03-27   
443-259 9 Columbia MD BLTMMDCHAMD  238   2003-02-25   
443-341 8 Catonsville MD BLTMMDCHAMD  238   2004-03-27   
443-922 A Edgewood MD BLTMMDSN0MD  238      
443-922 2 Edgewood MD BLTMMDSN0MD  238   2006-03-31   
484-893 5 Bethlehem PA PHLAPAFGXDY  228   2005-08-06   
571-339 6 Engleside VA HRNDVACKAMD  236   2006-07-07   
609-323 A Ewing NJ CMDNNJCE1MD  222      
609-323 1 Ewing NJ CMDNNJCE1MD  222      
609-323 2 Ewing NJ CMDNNJCE1MD  222      
609-447 A Florence (Burlington) NJ CMDNNJCE1MD  222      
609-447 6 Florence (Burlington) NJ CMDNNJCE1MD  222      
609-535 A Vincentown NJ CMDNNJCE1MD  222      
609-535 6 Vincentown NJ CMDNNJCE1MD  222      
609-556 A Fort Dix NJ CMDNNJCE1MD  222      
609-556 6 Fort Dix NJ CMDNNJCE1MD  222      
609-566 A Lambertville NJ CMDNNJCE1MD  222      
609-566 7 Lambertville NJ CMDNNJCE1MD  222      
609-570 2 Mercerville NJ CMDNNJCE1MD  222   2007-06-03   
609-570 3 Mercerville NJ CMDNNJCE1MD  222   2006-04-08   
609-630 A Hightstown NJ CMDNNJCE1MD  222      
609-630 6 Hightstown NJ CMDNNJCE1MD  222      
609-668 A Mount Holly NJ CMDNNJCE1MD  222      
609-668 6 Mount Holly NJ CMDNNJCE1MD  222      

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Last updated: Fri, 22 Mar 2024 03:02:44 UTC

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