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.
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OCN: 013B UNION TELEPHONE COMPANY

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
307-741 A Glenrock WY CHYNWYMAXZX  654      
307-744 A Newcastle WY CHYNWYMAXZX  654      
307-747 A Mountain View WY CHYNWYMAXZX  654      
307-749 A Pinedale WY CHYNWYMAXZX  654      
307-759 A Lusk WY CHYNWYMAXZX  654      
307-779 A Wheatland WY CHYNWYMAXZX  654      
307-780 A Mountain View WY CHYNWYMAXZX  654      
307-790 A Sundance WY CHYNWYMAXZX  654      
307-798 A Rock River WY CHYNWYMAXZX  654      
307-799 A Evanston WY CHYNWYMAXZX  654      
307-850 A Riverton WY CHYNWYMAXZX  654      
307-858 A Riverton WY CHYNWYMAXZX  654      
307-870 A Green River WY CHYNWYMAXZX  654      
307-884 A Afton WY CHYNWYMAXZX  654      
307-890 A Freedom WY CHYNWYMAXZX  654      
307-977 A Laramie WY CHYNWYMAXZX  654      
435-202 A Logan UT SLKCUTMAXJY  660      
435-766 A Vernal UT SLKCUTMAXJY  660      
435-768 A Duchesne UT SLKCUTMAXJY  660      
435-778 A Manila UT SLKCUTMAXJY  654      
435-779 A Garden City UT SLKCUTMAXJY  660      
435-880 A Dutch John UT SLKCUTMAXJY  654      
435-948 A Garden City UT SLKCUTMAXJY  660      
970-269 A Maybell CO DNVRCOMA64Z  656      
970-326 A Craig CO DNVRCOMA64Z  656      
970-537 A Kremmling CO DNVRCOMA64Z  656      
970-574 A Rangely CO DNVRCOMA64Z  656      
970-655 A Granby CO DNVRCOMA64Z  656      
970-734 A Steamboat Springs CO DNVRCOMA64Z  656      
970-745 A Grand Junction CO DNVRCOMA64Z  656      
970-750 A Walden CO DNVRCOMA64Z  656      
970-751 A Delta CO DNVRCOMA64Z  656      
970-755 A Rangely CO DNVRCOMA64Z  656      
970-756 A Craig CO DNVRCOMA64Z  656      
970-757 A Hayden CO DNVRCOMA64Z  656      
970-758 A Fraser CO DNVRCOMA64Z  656      
970-767 A Fort Collins CO DNVRCOMA64Z  656      
970-770 A Montrose CO DNVRCOMA64Z  656      
970-873 A Walden CO DNVRCOMA64Z  656      
970-942 A Meeker CO DNVRCOMA64Z  656      

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Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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