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DNS zone

DNS zone

DNS zone definition

A DNS zone is a specific part of the domain namespace that belongs to, is assigned to, and is managed by a certain administrator or organization. It’s the space on the nameserver that is assigned to a certain legal entity. For instance, organizations have their own DNS zones on a namespace that only belongs to them, allowing them to have more granular control of DNS components. A single DNS namespace can have one or more DNS zones, and a different DNS service or host manages each individual DNS zone.

Within one DNS zone, a domain and multiple subdomains can be managed by one entity So, a DNS zone is not one domain name or one DNS server because a DNS zone can contain multiple subdomains, and one server can host multiple DNS zones. A DNS zone is useful for administrative purposes, such as delegating tasks.

See also: DNS record, DNS server

DNS zone types

  • Primary DNS zone. The primary DNS zone is also called the master DNS zone. The primary DNS zone contains the original zone file – all the zone’s DNS records.
  • Secondary DNS zone. The secondary DNS zone is also called the slave DNS zone. It contains a copy of the zone file, and you can use it to boost performance, create backups of your DNS records, redundancy, and hide your primary DNS zone.

Further reading

Ultimate digital security