$TTL 86400
@   IN  SOA ns1.comed.net. admin.comed.net. (
        2026010601 ; Serial (เพิ่มทุกครั้งเมื่อแก้)
        3600
        1800
        604800
        86400 )

@       IN  NS      ns1.comed.net.
ns1     IN  A       192.168.10.10

aaa     IN  A       192.168.10.10
bbb     IN  A       192.168.10.10
ccc     IN  A       192.168.10.10
ddd     IN  A       192.168.10.10