Start Of Authority resource.
TypeValue = 6
Name of the host where the master zone file for this zone resides.
The person responsible for this domain name.
The version number of the zone file.
How often, in seconds, a secondary name server is to check for updates from the primary name server.
How often, in seconds, a secondary name server is to retry after a failure to check for a refresh.
Time in seconds that a secondary name server is to use the data before refreshing from the primary name server.
The minimum number of seconds to be used for TTL values in RRs.