/**
 * Brazilian valid DDD (direct dialing at a distance) codes.
 */ const DDDs = [ "11" , "12" , "13" , "14" , "15" , "16" , "17" , "18" , "19" , "21" , "22" , "24" , "27" , "28" , "31" , "32" , "33" , "34" , "35" , "37" , "38" , "41" , "42" , "43" , "44" , "45" , "46" , "47" , "48" , "49" , "51" , "53" , "54" , "55" , "61" , "62" , "63" , "64" , "65" , "66" , "67" , "68" , "69" , "71" , "73" , "74" , "75" , "77" , "79" , "81" , "82" , "83" , "84" , "85" , "86" , "87" , "88" , "89" , "91" , "92" , "93" , "94" , "95" , "96" , "97" , "98" , "99" ] ; example param code const isDDD = ( code ) : boolean => DDDs . indexOf ( code ) !== - 1 ; export default isDDD ;