An SOA Record is short for Start of Authority. What does that mean? The SOA Record specifies authoritative information about a DNS zone, including the primary name server, the email of the domain administrator, the domain serial number, and several timers relating to refreshing the zone.
Here’s an SOA Record example:
# dig SOA simlife.com ;; ANSWER SECTION: simlife.com. 86400 IN SOA ns1simli.vernalweb.com. skemey.vernalweb.com. 2014102407 86400 7200 3600000 86400
The example shows a dig result for simlife.com. The actual SOA Record is the information following “IN SOA”. For this example, the actual SOA Record is:
ns1simli.vernalweb.com. skemey.vernalweb.com. 2014102407 86400 7200 3600000 86400
- The primary name server for the domain. ns1simli.vernalweb.com
- The responsible ‘party’ for the domain. Typically an email address with the ‘@’ character replaced with a period. skymey.vernalweb.com
- A timestap that’s updated whenever the DNS Zone changes. 2014102407
- The number of seconds before the zone should be refreshed. 86400
- The number of seconds before a failed refresh should be retried. 7200
- The upper limit in seconds before a zone is considered no longer authoritative. 3600000
- The negative result TTL (for example, how long a resolver should consider a negative result for a subdomain to be valid before retrying). 86400
All of these values are the default values set by cPanel.
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