*.nsec.example. 3600  IN   A    10.6.6.6

explicita.nsec.example. 3600 IN A 203.0.113.1
explicita2.nsec.example. 3600 IN A 203.0.113.2

.    3600  IN   SOA . . 0 0 0 0 0
.      3600  IN   NS   ns.
ns.    3600  IN   A    192.0.2.1