Nameserver variability refers to the randomization of nameservers assigned to each zone published to the NS1 Managed DNS network. Optionally, you can request nameserver pinning to ensure all zones are assigned to the same nameserver pool. Refer to Nameserver assignments for details, and to the information below for frequently asked questions on this topic.
Why would I want to pin my nameserver assignments? - Pinning your nameserver pool assignments can simplify nameserver delegation at the domain registrar, especially if you manage many domains. Since all of your NS1 zones will be assigned the same set of nameservers, you can automate delegation to use the same nameserver addresses instead of delegating each domain individually.
Do I need to pin my nameservers? - No. Unless you have applied or will apply advanced automation configured between NS1 and a third-party platform requiring consistent nameserver assignments, you likely do not need to enable nameserver pinning.
If I enable nameserver pinning, will the NS records in my existing zones be updated with the pinned pool? - No. Enabling nameserver pinning does not automatically update your existing NS records — however, you can request that the NS1 customer support team do so upon enabling the feature.
Will my DNS records resolve if my nameservers don't match the NS1 pool at the registrar? - Yes. However, DNS checking services might indicate that the NS set of the parent zone (as in, the TLD zone hosted elsewhere) does not match the NS set of the child zone (as in, the zone hosted by NS1). While this should not cause significant issues, it is generally considered best practice to ensure the zone’s NS record matches those delegated at the domain registrar.
What if I am using custom or vanity nameservers? - Contact the NS1 support team for guidance on setting up vanity nameservers.