Here is an example for 0.0.10.in-addr.arpa

From 389 Directory Server

# 0.0.10.in-addr.arpa, DNS, example.com
dn: cn=0.0.10.in-addr.arpa,ou=DNS,dc=example,dc=com
dnszonename: 0.0.10.in-addr.arpa
dnszonemaster: tim.foobar.com
dnsclass: IN
dnstype: SOA
dnsadminmailbox: tim.foobar.com
dnsminimum: 3600
objectClass: dnszone
cn: 0.0.10.in-addr.arpa
dnsserial: 12345
dnsrefresh: 10800
dnsretry: 3600
dnsexpire: 3600

# ns1, 0.0.10.in-addr.arpa, DNS, example.com
dn: cn=ns1,cn=0.0.10.in-addr.arpa,ou=DNS,dc=example,dc=com
dnsipaddr: 127.0.0.1
dnscname: ns1
cn: ns1
dnstype: NS
dnsclass: IN
objectClass: dnsrrset
objectClass: dnszone

# 13, 0.0.10.in-addr.arpa, DNS, example.com
dn: cn=13,cn=0.0.10.in-addr.arpa,ou=DNS,dc=example,dc=com
cn: 13
dnsdomainname: 13
dnscname: cyrus.foobar.com.
dnstype: PTR
dnsclass: IN
objectClass: dnsrrset
objectClass: dnszone