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.

Lake Monroe, IN

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
812-837 A ELVLINXADS1  0818 SMITHVILLE COMM., INC DBA SMITHVILLE TELEPHONE CO. 338      
812-837 0   0818 SMITHVILLE COMM., INC DBA SMITHVILLE TELEPHONE CO. 338      
812-837 1   0818 SMITHVILLE COMM., INC DBA SMITHVILLE TELEPHONE CO. 338      
812-837 2   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 338   2019-10-24   
812-837 3   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 338   2019-10-24   
812-837 4   145J TERRA NOVA TELECOM INC. 338   2025-07-10   
812-837 5   4803 LEVEL 3 COMMUNICATIONS, LLC - IN 338   2019-09-30   
812-837 6   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 338   2021-07-09   
812-837 7   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 338   2021-07-09   
812-837 8   0818 SMITHVILLE COMM., INC DBA SMITHVILLE TELEPHONE CO. 338      
812-837 9   0818 SMITHVILLE COMM., INC DBA SMITHVILLE TELEPHONE CO. 338      
930-274 A BLTNIN01XEY  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 338      
930-274 8   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 338   2024-11-22   
930-274 9   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 338   2023-03-19   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.