The 'Blue Knights' consortium led by a former Rangers director and backed by the fans had earlier confirmed it was among the bidders and pressed for clarity on the club's future before they host rivals Celtic on March 25.
However, such a speedy resolution seems unlikely.
"We are very pleased to announce that to date we have received several indicative bids for Rangers Football Club," administrators Duff and Phelps said in a statement.
"We believe the level of interest in purchasing the club from around the world reflects the pedigree and history of the club and the fact the financial position of the business is beginning to clear and will continue to do so over forthcoming weeks," it added.
The administrators said there were "complex issues to be resolved" and these were affecting the bidding process.
"We're ready to go, we have the finances in place and we want to get the club stabilised as quickly as possible," said former Rangers director Paul Murray, who is heading the Blue Knights.
"Like every other Rangers fan, I'd love there to be some certainty about the future of our club before next weekend's Old Firm game," he added, referring to the clash with Celtic at Ibrox.
