Recently I hv a requirement to subdelegate out any 3rd level domain of
abc.com to another DNS server. Can I define as follow with a wild card
?

Under the dbfile for the 2ndlevel.com zone file.
$Origin abc.com IN SOA ....
...
...
* IN NS svr1.def.com.
svr1.def.com. IN A 55.55.55.55


E.g, Anyone performing query to www.aaa.def.com; www.bbb.def.com;
www.ccc.def.com; www.xxx.def.com ... will be forwarded to svr1.def.com
name server.

Thanks alot
VSSS