The 13 goal hitman has found himself one of the most sought after players in the Nationwide in recent weeks with his contract expiring and news of the £45,000 release clause in his contract.
Barnsley believe that they are close to signing the former tennis pro but Boulding has yet to come and confirm or deny the claim.
Now it seems first division Derby and local rivals Hull are in the chase.
The Rams are under new ownership and have money to buy players, this month they have already signed Manel, Jamie Vincent and Marco Reich. On top of that Leon Osman and Rob Edwards have joined on loan.
The prospect of first division football in a stadium such as Pride Park may tempt Boulding away.