delete domain in ripe

For Delete Domain By Syncupdate in Ripe panel

domain: 136.241.94.IN-ADDR.ARPA
descr: OracleInternet Reverse Delegation
admin-c: FF7296-RIPE
tech-c: FF7296-RIPE
zone-c: FF7296-RIPE
nserver: ns.oracle.ir
nserver: ns2.oracle.ir
nserver: ns3.oracle.ir
mnt-by: oracle-mnt
created: 2009-10-03T08:32:06Z
last-modified: 2012-03-01T22:26:30Z
source: RIPE
delete:

and for test name server define for prefix search in ripe   PREFIX.IN-ADDR.ARPA

For example   136.241.94.IN-ADDR.ARPA