Can subdomains be used with an ip with Nginx for testing

Before I transfer a domain I would like to know I have the config files setup correctly. I don’t seem to be able to use server_name sub1.192.241.223.202 in

server {
    listen 0.0.0.0:80;
    server_name sub1.192.241.223.202; 
    access_log /var/log/nginx/ddAppSub1.log;
    location / {
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header HOST $http_host;
        proxy_set_header X-NginX-Proxy true;
	proxy_pass http://127.0.0.1:9000;
    }
}

Will changing the ip above to MyDomain work when the domain is transfered?

server_name sub1.MyDomain.com;