Nameserver (NS) records indicate which DNS servers are authoritative for a domain or subdomain. These are the nameservers that store the DNS records for the domain.
NS Records define the name of the zone’s domain nameservers. Since these types of records don’t include IP addresses, an A record needs to be established for the domain prior to adding an NS record to ensure the resolution request succeeds. For use with Secondary DNS, an A record would need to be established for both DNS servers.
NS records are most commonly used when Secondary DNS is established. This allows a second set of DNS nameservers to be authoritative for the domain. These records are part of the “backup” solution that Secondary DNS provides by directing resolution requests to the alternate DNS server in the event one is offline.
There are instances in which subdomains need to point to a different nameserver. In these cases, NS records are used to point the subdomains to the external nameservers.
Once logged into your Constellix DNS dashboard, the following steps will guide you through the process of adding an NS record to your domain.
1. Select the appropriate domain
In the Constellix DNS dashboard, select the domain to which the NS records will be added from the Recently Updated Domains list. Optionally, you can locate the domain using the search bar on the upper left.
2. Expand NS Record Options
Once the domain is selected, you will be directed to the Records page. Scroll down to NS Record. If you have not configured any NS records for this domain yet, click the green + icon beside the NS record to expand options, otherwise skip to step 3.
3. Add the NS Record
Click on the green + icon from the row of action symbols to add the NS record.
4. Enter the NS Record Values
a) Name: Enter the hostname for the record.
b) TTL: Time to Live, measured in seconds, determines how long the record is cached in resolvers.
For more information on best practices for TTLs, visit our What is TTL resource.
c) Disable Record: This checkbox will disable the record from the nameserver while allowing its configurations to remain in the Constellix DNS control panel.
See our Disabling a Record tutorial for details on the NX Domain feature.
d) Host: Enter the fully qualified domain name for the nameserver. For example, ns0.nameserver.com.
e) Notes: This section allows you to add any pertinent information associated with the record along with keywords to allow you to search for your records later. It is optional but recommended.
f) Save: To add more NS records, click on Save and Continue, otherwise, select Save and Close.
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