Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 517 [Rate centres in NPA 517] [Dial plan for NPA 517]

NXX: 721

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
517-721 A Lansing MI DMDLMIDDRS0  9323 MICHIGAN BELL TEL CO 346      
517-721 0 Lansing MI LNNGMIMNXSZ  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 346   2016-10-10   
517-721 1 Lansing MI LNNGMIMNXMZ  516C AT&T CORP. 346      
517-721 2 Lansing MI DMDLMIDDRS0  9323 MICHIGAN BELL TEL CO 346      
517-721 3 Lansing MI DMDLMIDDRS0  9323 MICHIGAN BELL TEL CO 346      
517-721 4 Lansing MI DMDLMIDDRS0  9323 MICHIGAN BELL TEL CO 346      
517-721 7 Lansing MI LNNGMIVE2MD  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 346   2012-06-10   
517-721 8 Lansing MI DMDLMIDDRS0  9323 MICHIGAN BELL TEL CO 346      
517-721 9 Lansing MI LNNGMIMNX4Z  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 346   2011-05-06   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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