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You can add the same domain to multiple accounts to be able to add subdomains, however only one account will be able to link the apex domain to a port.

To add a domain you will need to verify it by adding a DNS record on your DNS hosting service.

Click add domain on the domains page and enter your domain name (fully qualified domain name, for example yourdomain.com) to view instructions to verify that you control it.

Log in to the control panel on your DNS provider and find the DNS settings for your domain. Add a new text (TXT) record with the name and token shown on Northflank, and set the time to live (TTL) to the recommended or lowest value.

Return to Northflank to verify the domain, once verified you can begin adding subdomains.

You can add as many subdomains as you require for each domain but each subdomain on Northflank is unique; multiple accounts cannot add the same subdomain.

You can create as many levels of subdomains as required (for example one.yourdomain.com or three.two.one.yourdomain.com).

To add a subdomain, select the domain namespace to add it to (yourdomain.com) and enter the subdomain to add (one or three.two.one).

After adding a subdomain you will see the name and token to add to your DNS records as a CNAME record, as well as the recommended time to live (TTL).

Log in to the control panel on your DNS provider, find the DNS settings for your domain, and add the record with the information specified on Northflank.

After adding the record for your domain or subdomain, return to your Northflank account's domains page and select verify on the entry for your domain or subdomain.

If it cannot be verified you may need to wait for the DNS to update, this will depend on the TTL set on the DNS host for the record. If it still fails to verify after the TTL has elapsed, check you have entered the record correctly and try again.

You can close the verification information to come back to it later, and view it again by clicking verify on the entry.

When successfully verified you can link the domain or subdomain to a public port on a deployment.

An apex domain can only be used to link to a port on one account.

To link an apex domain on Northflank create a subdomain under the domain namespace with @ as the subdomain.

Your DNS provider must support CNAME flattening or ALIAS/ANAME records in order to link an apex domain.

ProviderApex domain record support
Cloudflare Yes (CNAME flattening)
Namecheap DNS Yes (ALIAS record)
NS1 Yes (ALIAS record)
Namecheap Web Hosting/cPanel No
OVH No

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