The defender wanted to leave the Championship club during the summer, but saw his transfer request rejected in August.
Reports had linked the 27-year-old with the likes of Queens Park Rangers and Newcastle United this transfer window.
However, Hughton has admitted that none of those clubs has been forthcoming with bids.
"There will be speculation but at this moment we've not had one enquiry for him," the boss told the Birmingham Mail.
Ridgewell joined the Blues in 2007 from rivals Aston Villa.