SQL> select DBMS_ROWID.ROWID_RELATIVE_FNO(RowID),
2 DBMS_ROWID.ROWID_BLOCK_NUMBER(RowID)
3 from dual
4 where RowNum=1;
DBMS_ROWID.ROWID_RELATIVE_FNO(ROWID) DBMS_ROWID.ROWID_BLOCK_NUMBER(ROWID)
------------------------------------ ------------------------------------
1 2082