Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Switch: DTRTMIBATMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
313-771 A Detroit Zone 1 MI 948H AIRUS, INC. - MI 340      
313-771 1 Detroit Zone 1 MI 948H AIRUS, INC. - MI 340   2017-08-12   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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