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: 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
323-999 A Los Angeles: DA 03 CA IRVNCASM1MD  730      
323-999 0 Los Angeles: DA 03 CA   730      
332-316 A New York City Zone 01 NY   132   2026-03-02   
332-316 2 New York City Zone 01 NY   132   2026-03-02   
332-316 3 New York City Zone 01 NY   132   2026-03-02   
332-316 4 New York City Zone 01 NY   132   2026-03-02   
339-215 2 Lexington MA   128   2017-04-14   
339-222 5 Waltham MA   128   2005-04-10   
339-244 5 Bryantville MA   128   2009-05-29   
339-293 5 Melrose MA   128   2005-04-10   
339-469 5 Rockland MA   128   2006-03-30   
339-900 5 Marshfield MA   128   2017-04-16   
341-219 A Oakland: Berkeley DA CA SNJSCAYB0MD  722      
341-219 5 Oakland: Berkeley DA CA   722   2022-08-05   
341-219 8 Oakland: Berkeley DA CA   722   2022-08-05   
346-328 4 Spring TX   560   2018-10-25   
346-556 A Houston TX HSTNTXPB6MD  560      
346-556 2 Houston TX   560   2022-07-24   
346-556 8 Houston TX   560   2022-07-24   
346-557 A Houston Suburban TX HSTNTXPB6MD  560      
346-557 1 Houston Suburban TX   560   2022-07-24   
346-557 4 Houston Suburban TX   560   2022-07-24   
346-557 6 Houston Suburban TX   560   2022-07-24   
361-239 1 Flour Bluff TX   564   2007-07-21   
361-265 1 Clarkwood TX   564   2010-12-23   
361-276 A Calallen TX CRCHTXCB5MD  564      
361-276 5 Calallen TX   564   2022-07-24   
361-276 8 Calallen TX   564   2022-07-24   
361-292 A Corpus Christi TX CRCHTXCB5MD  564      
361-292 6 Corpus Christi TX   564   2022-08-11   
361-292 7 Corpus Christi TX   564   2022-08-11   
361-343 8 Beeville TX   564   2012-04-15   
361-345 A Ingleside TX CRCHTXCB5MD  564      
361-345 0 Ingleside TX   564      
361-412 2 Victoria TX   564   2015-09-04   
361-450 4 Rockport TX   564   2012-04-15   
361-453 3 Alice TX   564   2012-04-15   
361-520 A Calallen TX CRCHTXCB5MD  564      
361-520 8 Calallen TX   564      
361-543 2 Woodsboro TX   564   2012-04-15   
361-561 A Corpus Christi TX CRCHTXCB5MD  564      
361-561 0 Corpus Christi TX   564      
361-561 1 Corpus Christi TX   564      
361-561 2 Corpus Christi TX   564      
361-561 3 Corpus Christi TX   564      
361-561 4 Corpus Christi TX   564      
361-561 5 Corpus Christi TX   564      
361-561 6 Corpus Christi TX   564      
361-561 8 Corpus Christi TX   564      
361-589 2 Padre Island TX   564   2010-12-23   

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Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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