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.
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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
313-662 A Detroit Zone 5 MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
313-769 A Detroit Zone 6 MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
313-828 A Detroit Zone 5 MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
313-859 A Detroit Zone 5 MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340   2024-12-31   
313-879 A Detroit Zone 1 MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
313-887 A Detroit Zone 1 MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
517-579 A Howell MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
517-618 A Howell MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
586-203 A Mount Clemens MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
586-207 A Washington MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
586-244 A New Haven MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
586-435 A Roseville MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
586-477 A Mount Clemens MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
586-486 A Center Line MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
586-510 A Center Line MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
586-623 A Romeo MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
586-648 A New Baltimore MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
586-693 A Warren MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
586-723 A Mount Clemens MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
586-797 A Utica MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
586-799 A Utica MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
586-838 A Warren MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
586-894 A Romeo MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
586-928 A New Haven MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
586-981 A Warren MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
734-217 A Ypsilanti MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
734-238 A Wayne MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
734-239 A Ann Arbor MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
734-259 A Plymouth MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
734-272 A Ann Arbor MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
734-299 A Carleton MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
734-322 A Monroe MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
734-328 A Belleville MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
734-337 A Ypsilanti MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
734-343 A Livonia MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
734-344 A Monroe MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
734-348 A Flat Rock MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
734-364 A Maybee MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
734-388 A Dexter MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
734-393 A Lost Peninsula MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
734-418 A Ann Arbor MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
734-437 A Livonia MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
734-443 A New Boston MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
734-446 A Plymouth MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
734-526 A Milan MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
734-532 A Romulus MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
734-606 A New Boston MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
734-642 A Trenton MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
734-719 A Chelsea MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
734-720 A Wyandotte MI 6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      

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

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