Yes, Oracle provides a package called dbms_rowid. It is very useful in getting information about specific rows in a table.
Some of the procedures supplied by this package are given as follows:
i. rowid_create
ii. rowidjnfo
iii. rowid_object
iv. rowid_relative_fno
Note that rowid_create provides the rowid of an existing row by using information, such as file number and block. It cannot be used to create a new rowid for usage.