The Toon are desperate to add strikers to their squad as they currently have no fit first team options with pre-season set to start in around a month’s time.
Boss Alan Pardew has a budget to work with this summer and has already seen a bid for Leeds United striker Ross McCormack turned down.
De Jong, whose brother Luuk played at St James’ Park in the second half of last season, has admitted that the North East club have approached him and he doesn’t know where he will be playing next term.
“I really do not know what I’ll do next season. I have spoken with the club but nothing is sorted,” De Jong told Holland’s Soccer News.
“Also with Newcastle United, where my brother played last time, they have had a little contact with my agent.
“There was contact before, but it’s nothing concrete.
“Newcastle is a great club.”