$ORIGIN example.com. ; designates the start of this zone file in the namespace

$TTL 1h ; default expiration time of all resource records without their own TTL value

example.com. IN SOA ns.example.com. username.example.com. ( 2007120710 1d 2h 4w 1h )

example.com. IN NS ns ; ns.example.com is a nameserver for example.com

example.com. IN NS ns.somewhere.example. ; ns.somewhere.example is a backup nameserver for example.com

example.com. IN MX 10 mail.example.com. ; mail.example.com is the mailserver for example.com

@ IN MX 20 mail2.example.com. ; equivalent to above line, "@" represents zone origin

@ IN MX 50 mail3 ; equivalent to above line, but using a relative host name

example.com. IN A 192.0.2.1 ; IPv4 address for example.com

IN AAAA 2001:db8:10::1 ; IPv6 address for example.com

ns IN A 192.0.2.2 ; IPv4 address for ns.example.com

IN AAAA 2001:db8:10::2 ; IPv6 address for ns.example.com

www IN CNAME example.com. ; www.example.com is an alias for example.com

wwwtest IN CNAME www ; wwwtest.example.com is another alias for www.example.com

mail IN A 192.0.2.3 ; IPv4 address for mail.example.com

mail2 IN A 192.0.2.4 ; IPv4 address for mail2.example.com

mail3 IN A 192.0.2.5 ; IPv4 address for mail3.example.com

2.1.2.1 IN NAPTR 10 100 "u" "E2U+sip" "!^.*$!sip:info@example.com!" .

IN NAPTR 10 101 "u" "E2U+h323" "!^.*$!h323:info@example.com!" .

IN NAPTR 10 102 "u" "E2U+msg" "!^.*$!mailto:info@example.com!" .

2.1.0.10.in-addr.arpa. IN PTR server.example.com.

example.com. IN SPF v=spf1 mx:example.com -all

sip.example.com. IN SRV 0 5 5060 sip.example.com.

sip.example.com. IN TXT "text; containing ; spaces; and; semicolons ;" ; comment about the text