Overview
DNS delegation allows control of a subdomain to be handed off to another DNS provider using NS records.
This article explains how to create a subdomain in UltraDNS and delegate it to a third-party provider such as Azure DNS.
When to Use This Article
Use this article if you need to:
Create a subdomain
Delegate DNS control to another provider
Understand NS record delegation
Creating a Subdomain
A subdomain is created by defining it within the parent zone.
Once created, the subdomain can be managed locally or delegated externally.
The subdomain must exist before delegation can occur.
Delegating a Subdomain Using NS Records
Delegation is performed by adding NS records for the subdomain that point to the target provider’s name servers.
Key points:
NS records must be added at the parent zone
Delegation applies only to the specified subdomain
The delegated provider becomes authoritative for that subdomain
Common Delegation Issues
Incorrect NS record placement
Missing trailing dots in name server entries
Propagation delays
Conflicting records at the parent level