▁Detroit ' s ▁area ▁code ▁ 3 1 3 , ▁one ▁of ▁the ▁original ▁ 8 6 ▁area ▁codes ▁in ▁the ▁North ▁American ▁Number ing ▁Plan . ▁In ▁ 1 9 9 3 , ▁area ▁code ▁ 8 1 0 ▁was ▁split ▁from ▁ 3 1 3 ; ▁the ▁service ▁area ▁of ▁ 8 1 0 ▁initially ▁included ▁all ▁of ▁the ▁former ▁ 3 1 3 ▁outside ▁of ▁Mon roe , ▁Wayne , ▁and ▁Was ht en aw ▁count ies . ▁▁ ▁In ▁ 1 9 9 7 , ▁Oak land ▁County , ▁border ing ▁Ma comb ▁County ▁to ▁the ▁west , ▁was ▁split ▁from ▁area ▁code ▁ 8 1 0 ▁as ▁area ▁code ▁ 2 4 8 . ▁Area ▁code ▁ 5 8 6 ▁was ▁first ▁proposed ▁as ▁an ▁overlay ▁on ▁top ▁of ▁ 8 1 0 , ▁to ▁be ▁implemented ▁in ▁ 2 0 0 0 . ▁O pp osition ▁to ▁the ▁overlay ▁proposal ▁was ▁inten se , ▁and ▁ 5 8 6 ▁was ▁instead ▁implemented ▁as ▁a ▁split . ▁The ▁area ▁code ▁was ▁introduced ▁on ▁September ▁ 2 2 nd , ▁ 2 0 0 1 , ▁with ▁perm iss ive ▁d ial ing ▁ending ▁on ▁March ▁ 2 3 rd , ▁ 2 0 0 2 . ▁ ▁Service ▁area ▁ ▁Area ▁code ▁ 5 8 6 ▁serves ▁Ma comb ▁County , ▁Michigan , ▁including ▁the ▁following ▁communities : ▁▁ ▁Arm ada , ▁Michigan ▁Center ▁Line , ▁Michigan ▁Ch ester field ▁Township , ▁Michigan ▁Cl inton ▁Char ter ▁Township