To Get Object Name and Type From File# and Block#

Given file id and block id, the object details can be queried by following SQL query.

This example shows the object is located on file# = 1 , block # = 68619.

SQL>select OWNER,SEGMENT_NAME,SEGMENT_TYPE,TABLESPACE_NAME 
      from  dba_extents 
     where FILE_ID=1 and 
     68619 BETWEEN block_id AND ( block_id + blocks);

OWNER    SEGMENT_NAME    SEGMENT_TYPE   TABLESPACE_NAME
-------- --------------- -------------- ----------------------------
SYS      C_OBJ#_INTCOL#  CLUSTER        SYSTEM