Index Elementary School 436 Index Ave Index, WA 98256 Phone : (360) 793-1330 Business Category Schools Schools-Elementary Schools-Junior High Schools-Public Index School Dist No 63--indx Sultan, WA 98294 Phone : (360) 793-1330 Business Category Administration Of Educational Programs Index School Dist No 63--elementary School Index, WA 98256 Phone : (360) 793-1330 Business Category Administration Of Educational Programs