Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
509-567 A Pasco WA KNWCWAII4MD  676      
509-567 7 Pasco WA KNWCWAII4MD  676   2016-12-09   
509-571 1 Yakima WA KNWCWAII4MD  676   2014-02-04   
509-572 2 Kennewick WA KNWCWAII4MD  676   2011-05-06   
509-578 1 Richland WA KNWCWAII4MD  676   2014-03-10   
509-579 0 Kennewick WA KNWCWAII4MD  676   2015-08-31   
509-579 4 Kennewick WA KNWCWAII4MD  676   2017-11-05   
509-579 5 Kennewick WA KNWCWAII4MD  676   2017-07-12   
509-584 A Wapato WA SNSDWAXXWMD  676      
509-584 0 Wapato WA SNSDWAXXWMD  676   2007-07-07   
509-619 A Kennewick WA KNWCWAII4MD  676      
509-619 0 Kennewick WA KNWCWAII4MD  676   2007-05-02   
509-620 8 Coulee Dam WA KNWCWAII4MD  676   2019-05-22   
509-644 A Loon Lake WA KNWCWAII4MD  676      
509-644 0 Loon Lake WA KNWCWAII4MD  676   2017-10-08   
509-653 8 Naches WA KNWCWAII4MD  676   2025-03-30   
509-673 9 Tieton WA KNWCWAII4MD  676   2025-03-30   
509-678 3 Cowiche WA KNWCWAII4MD  676   2025-03-30   
509-685 7 Colville WA KNWCWAII4MD  676   2016-06-25   
509-698 2 Selah WA ELBGWAXA8MD  676   2013-10-31   
509-713 7 Richland WA KNWCWAII4MD  676   2011-06-02   
509-738 9 Kettle Falls WA KNWCWAII4MD  676   2016-07-10   
509-748 4 Dallesport WA THDLORXAOMD  672   2008-05-18   
509-781 6 Prosser WA SNSDWAXXWMD  676   2007-06-23   
509-792 1 Pasco WA KNWCWAII4MD  676   2014-02-27   
509-820 3 Kennewick WA KNWCWAII4MD  676   2014-12-11   
509-823 4 Yakima WA KNWCWAII4MD  676   2008-07-25   
509-873 0 Kennewick WA KNWCWAII4MD  676   2018-12-04   
509-876 A Walla Walla WA KNWCWAII4MD  676      
509-876 0 Walla Walla WA KNWCWAII4MD  676   2015-11-12   
509-876 2 Walla Walla WA KNWCWAII4MD  676   2007-05-02   
509-876 4 Walla Walla WA KNWCWAII4MD  676   2008-07-25   
509-876 8 Walla Walla WA KNWCWAII4MD  676   2012-12-01   
509-895 6 Yakima WA KNWCWAII4MD  676   2018-10-07   
509-895 7 Yakima WA KNWCWAII4MD  676   2007-05-02   
509-896 6 Mabton WA SNSDWAXXWMD  676   2007-06-23   
509-902 A Yakima WA KNWCWAII4MD  676      
509-902 1 Yakima WA KNWCWAII4MD  676   2016-07-29   
509-902 8 Yakima WA KNWCWAII4MD  676   2018-01-07   
509-936 9 Chewelah WA KNWCWAII4MD  676   2017-08-30   
509-940 5 Richland WA KNWCWAII4MD  676   2017-07-23   
509-940 9 Richland WA KNWCWAII4MD  676   2017-12-03   
509-968 5 Ellensburg WA ELBGWAXA8MD  676   2013-10-31   
509-987 1 Kennewick WA KNWCWAII4MD  676   2010-05-27   
517-238 6 Coldwater Lake MI ANTSMIAD0MD  348   2007-02-25   
517-296 8 Montgomery MI LNNGMIMN17Z  346   2017-07-08   
517-376 9 Howell MI FETPMIAU3MD  340   2007-02-25   
517-583 1 Tekonsha MI ANTSMIAD0MD  348   2007-02-25   
517-639 2 Quincy MI ANTSMIAD0MD  348   2007-02-25   
517-695 1 Ransom MI LNNGMIMN17Z  346   2026-03-01   

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Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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