Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Portsmouth, IA

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
712-743 A PTMOIAXPRS0  1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 644      
712-743 0   221F ONVOY, LLC - IA 644   2021-11-17   
712-743 1   1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 644      
712-743 2   1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 644      
712-743 3   1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 644      
712-743 4   221F ONVOY, LLC - IA 644   2021-10-30   
712-743 5   1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 644      
712-743 7   221F ONVOY, LLC - IA 644   2021-05-21   
712-743 8   5395 FARMERS MUTUAL COOPERATIVE TELEPHONE COMPANY - IA 644   2021-06-25   

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

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