$ORIGIN example.com. ; All unqualified names relative to this domain. $TTL 86400 ; default time to live @ IN SOA ns.icann.org. noc.dns.icann.org. ( 2020091009 ; Serial - 2020-09-10, change 9 7200 ; Refresh - 2 hours (7_200s) 3600 ; Retry - 1 hour (3_600s) 1209600 ; Expire - 14 days (1_209_600s) 3600 ; Minimum TTL - 1 hour (3_600s) ) ; Could also be written as a single line with no parens. IN NS a.iana-servers.net. IN NS b.iana-servers.net. IN MX 0 . IN A 93.184.216.34 IN AAAA 2606:2800:220:1:248:1893:25c8:1946 ; Three CAA examples from RFC6844. IN CAA 0 issue "ca.example.net; account=230123" IN CAA 0 iodef "mailto:security@example.com" IN CAA 0 iodef "http://iodef.example.com/" bar IN CNAME foo foo IN TXT "Hello, world." www IN A 93.184.216.34 www.example.com. IN AAAA 2606:2800:220:1:248:1893:25c8:1946