How can I delegate a subdomain on Namecheap to Azure DNS?

Question

I have a Namecheap domain, example.com, and I want "*.sub.example.com" domains to use a DNS Zone that's set up on Azure. My understanding is that I just need to set up NS records on Namecheap for the subdomain that point to the Azure DNS servers, like so:

NS Record    sub    ns1-06.azure-dns.com.
NS Record    sub    ns2-06.azure-dns.net.
NS Record    sub    ns3-06.azure-dns.org.
NS Record    sub    ns4-06.azure-dns.info.

On the Azure DNS zone, I have an A record for @ and a wildcard record:

@    A    3600    X.X.X.X
*    A    3600    X.X.X.X

The sub.example.com domain resolves just fine, however, when I try to lookup test.sub.example.com (using dig test.sub.example.com), I get no records.

If I specify the Azure nameserver (eg, dig @ns1-06.azure-dns.com test.sub.example.com) the subdomain records resolve just fine.

I also verified the NS record setup on Namecheap using: dig NS sub.example.com, and it shows the correct Azure nameservers.

Am I missing a step?

Ben Davis Ben Davis · Accepted Answer · 2020-07-07T19:46:15

It looks like this was an error on my part when entering the subdomain NS records in Namecheap. I entered them as "sub.example.com" when I only needed to specify "sub".

How can I delegate a subdomain on Namecheap to Azure DNS?

1 Answers