According to your description, we can follow those steps to setup Azure DNS zone and your domain name:
1. Add record set via azure portal, point to your Azure VM:
![enter image description here](https://i.stack.imgur.com/rm4AT.png)
2.Add NS record to register.com, like this:
Host: web.jasonye.com
Record type: NS record
Value: ns1-01.azure-dns.com
After a few mins, we can use nslookup to verify name resoution is working or not:
nslookup -type=SOA jasonye.com
The following is an example response from the preceding command:
C:Users>nslookup -type=SOA jasonye.com
Server: UnKnown
Address: 2404:f801:10:12e:fe::2
Non-authoritative answer:
jasonye.com
primary name server = ns1-01.azure-dns.com
responsible mail addr = azuredns-hostmaster.microsoft.com
serial = 1
refresh = 3600 (1 hour)
retry = 300 (5 mins)
expire = 2419200 (28 days)
default TTL = 300 (5 mins)
ns1-01.azure-dns.com internet address = 40.90.4.1
After that, we can access this web via IE:
![enter image description here](https://i.stack.imgur.com/tf3YD.png)
More information about Azure DNS zone, please check this link.
Each registrar has their own DNS management tools to change the name
server records for a domain. In the registrar's DNS management page,
edit the NS records and replace the NS records with the ones Azure DNS
created.
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