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: 817J TELNET WORLDWIDE, INC.

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
231-395 A Grant MI   348      
231-450 1 Hesperia MI   348   2005-09-02   
231-459 2 Boyne City MI   348   2005-09-02   
231-462 4 Fountain MI   348   2005-09-02   
231-464 0 Freesoil MI   348   2005-09-02   
231-535 4 Walloon Lake MI   348   2005-09-02   
231-539 5 Pellston MI   348   2005-09-02   
231-637 A Northport MI   348      
231-647 A Coral MI   348      
231-682 A Alden MI   348      
231-695 A Howard City MI   348      
231-764 A Fife Lake MI   348      
231-774 0 Interlochen MI   348   2005-09-02   
231-793 3 White Cloud MI   348   2005-09-02   
231-822 A Beulah MI   348      
231-824 5 Manton MI   348   2005-09-02   
231-844 3 Indian River MI   348   2005-09-02   
231-902 A Hart MI   348      
231-981 4 Whitehall MI   348   2005-09-02   
231-994 0 Lake Leelanau MI   348   2005-09-02   
248-218 4 Rochester MI   340   2005-09-03   
248-220 5 Birmingham MI   340   2005-09-04   
248-243 0 Auburn Heights MI   340   2005-09-04   
248-254 8 West Bloomfield MI   340   2005-09-03   
248-286 A Southfield MI   340      
248-287 7 Lake Orion MI   340   2005-09-03   
248-294 2 Pontiac MI   340   2013-11-15   
248-294 3 Pontiac MI   340   2013-11-15   
248-294 6 Pontiac MI   340   2013-11-15   
248-313 1 Walled Lake MI   340   2005-09-03   
248-387 4 Commerce MI   340   2005-09-03   
248-429 3 Oxford MI   340   2005-09-02   
248-484 A Pontiac MI   340      
248-485 A Southfield MI   340      
248-493 A South Lyon MI   340      
248-498 A Troy MI   340      
248-554 3 Royal Oak MI   340   2005-09-03   
248-708 A Holly MI   340      
248-715 A Farmington MI   340      
248-741 A Farmington MI   340      
248-751 A Pontiac MI   340      
248-769 A Milford-White Lake MI   340      
248-823 3 Troy MI   340      
248-869 A Northville MI   340      
248-886 5 Drayton Plains MI   340   2005-09-03   
248-899 A Ortonville MI   340      
248-913 A Clarkston MI   340      
248-979 9 Birmingham MI   340   2011-03-11   
269-201 3 Watervliet MI   348   2005-09-03   
269-202 2 Coloma MI   348   2005-09-03   

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Last updated: Tue, 31 Mar 2026 13:56:49 UTC

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