ASH Report is reporting a Block ID that doesn't exist in DBA_EXTENTS

Hi,

I ran an ASH report (AWR returns the same data) as was seeing issues with enq: HW Contention and want to determine which Segment the contention is against.

The ASH report presented:

Event % Event P1 Value, P2 Value, P3 Value % Activity
------------------------------ ------- ----------------------------- ----------
Parameter 1 Parameter 2 Parameter 3
-------------------------- -------------------------- --------------------------
enq: HW - contention 78.10 "1213661190","7","83886314" 78.10
name|mode table space # block

I then ran this SQL to determine the Segment Name:

SELECT owner, segment_type, segment_name
FROM dba_extents a
WHERE file_id = 7
AND 83886314 BETWEEN block_id AND block_id + blocks - 1;

but it returned zero rows.

Further investigation against DBA_EXTENTS with this SQL: