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Phone Directory 605-644 Detail

State Major City Time Zone
South Dakota Sioux Falls Central / Mountain

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Example: (605) 644-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
605-644 Spearfish, SD Qwest Corporation Lawrence Landline 10/11/1997

Other Series For Prefixes

605-6440###
605-6441###
605-6442###
605-6443###
605-6444###
605-6445###
605-6446###
605-6447###
605-6448###
605-6449###