How do I point a subdomain to a different nameserver use Google Domains?

Question

I discovered this question: Can I use different nameservers for different subdomains?

And I tried it out using Google domains.

I currently have a site hosted with AWS. However, I'd like to use Siteground to host a subdomain.

How can I do this through Google domains? According to the answer I posted, you just have to update an NS record on Google domains with the desired subdomain name and the nameserver. However, I tried this and it is not working.

For example, in Google domains I'm using 5 AWS nameservers:

ns2.aws.org
ns3.aws.org
ns4.aws.org
ns5.aws.org

and in the custom resource records section, I have a NS record set up like this:

Name    Type    TTL     Data
dev     NS      5m      ns1.siteground.us
                        ns2.siteground.us

On siteground, I have a WordPress site installed on the dev.mysite.com domain

What else do I need to do to make it work?

Answer 1

Once you are in the Google Domains control panel you can select name servers from the menu and it allows you to set up to twelve different name servers.

If you want a subdomain on a different host, you normally do that with a CNAME or A Record. Google Domains actually makes this really easy, just type in your subdomain and set your hosts IP address.

Personally, I don't think you need the name server change if all you want is to set a subdomain, blog.example.com. You just need a IP address for your Siteground server.