Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 319 [Rate centres in NPA 319] [Dial plan for NPA 319]

NXX: 645

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
319-645 A Tiffin IA TFFNIAXORS0  1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 635      
319-645 0 Tiffin IA   593K MCC TELEPHONY LLC 635   2010-05-06   
319-645 1 Tiffin IA   1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 635      
319-645 2 Tiffin IA   1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 635      
319-645 3 Tiffin IA   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 635   2017-10-16   
319-645 4 Tiffin IA   9877 LEVEL 3 COMMUNICATIONS, LLC - IA 635   2019-08-01   
319-645 5 Tiffin IA   544H INTEGRATED PATH COMMUNCATIONS, LLC - IA 635   2018-05-14   
319-645 6 Tiffin IA   8344 TELEPORT COMMUNICATIONS AMERICA, LLC - IA 635   2020-01-31   
319-645 7 Tiffin IA   508J CENTURYLINK COMMUNICATIONS, LLC 635   2017-06-15   
319-645 8 Tiffin IA   221F ONVOY, LLC - IA 635   2021-05-07   
319-645 9 Tiffin IA   1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 635      

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

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