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.

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
313-259 A Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-392 A Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-392 0 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-392 1 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-392 2 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-392 4 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-392 5 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-392 6 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-392 7 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-392 8 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-392 9 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-393 A Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-394 A Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-394 0 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-394 2 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-394 3 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-394 4 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-394 5 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-394 6 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-394 7 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-394 8 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-396 A Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-446 A Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-446 0 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-446 1 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-446 2 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-446 3 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-446 4 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-446 5 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-446 6 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-446 7 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-446 9 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-448 A Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-448 0 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340   2011-01-08   
313-448 1 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340   2011-01-08   
313-448 2 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340   2011-01-08   
313-448 3 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340   2011-01-08   
313-448 4 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340   2011-01-08   
313-448 5 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340   2011-01-08   
313-448 6 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340   2011-01-08   
313-448 7 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340   2011-01-08   
313-448 8 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340   2011-01-08   
313-553 A Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-566 A Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-566 0 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-566 1 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-566 2 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-566 5 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-566 6 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      
313-566 7 Detroit Zone 1 MI 9323 AMERITECH MICHIGAN 340      

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Last updated: Tue, 04 May 2021 15:04:27 UTC

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