He has been linked with West Brom and has trained with Arsenal to keep up his fitness, but Campbell is looking at which clubs are showing firm interest.
Related ArticlesMike Ashley under attackRenaming St James' Park 'would cause uproar'Newcastle taken off marketMoat's Newcastle takeover plans in doubtChris Hughton revels in Newcastle winMike Ashley rejects Barry Moat's £80m takeover offerAnd the 35 year-old believes joining Newcastle could allow him to play a part in a promotion campaign before returning to the Premier League, where he has previously played for Tottenham, Arsenal and Portsmouth.
Campbell told ESPN Soccernet: "I have been approached by several clubs, and yes, it is correct to say that Newcastle are one of them.
"People might be surprised to hear me say that I would be very interested in a move there, but I have my reasons. Also, Newcastle are a big club and could be heading back to the Premier League. It appeals."