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.

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
712-228 A Sergeant Bluff IA SRBLIAXODS0  630      
712-237 A Sergeant Bluff IA SRBLIAXODS0  630      
712-247 A Sergeant Bluff IA SRBLIAXODS0  630      
712-257 A Sergeant Bluff IA SRBLIAXODS0  630      
712-271 A Sergeant Bluff IA SRBLIAXODS0  630      
712-285 A Sergeant Bluff IA SRBLIAXODS0  630      
712-421 A Sloan IA SLONIAXORS0  630      
712-428 A Sloan IA SLONIAXORS0  630      
712-923 A Sergeant Bluff IA SRBLIAXODS0  630      
712-924 A Sergeant Bluff IA SRBLIAXODS0  630      
712-934 A Sergeant Bluff IA SRBLIAXODS0  630      
712-942 A Sergeant Bluff IA SRBLIAXODS0  630      
712-943 A Sergeant Bluff IA SRBLIAXODS0  630      
712-946 A Salix IA SALXIAXORS0  630      

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

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