A disciplinary tribunal ruled on Thursday that Hearts cannot register players over the age of 21 until February 1 as a punishment for entering administration in June.
Dunfermline were hit with a transfer embargo until the end of the year in similar circumstances back in May, and Rangers believes the penalties are more lenient that the sanctions they faced during their long financial struggles.
A statement from Ibrox chief executive Craig Mather, released on the club's website, read: "Rangers are aware of the glaring differences in the sanctions imposed on three clubs who entered administration.
"Our club, Rangers, was hit with a £50,000 fine and given a 12-month registration embargo.
"While no one at this club wishes to see others fall on hard times, questions must be asked about these anomalies, and we fully understand the rising anger among our fans.
"They are entitled to think there is one rule for our club and another for everyone else. We will be seeking clarification for our fans."