If you have an Enjin website, are using Enjin's name servers and are on their Ultimate or Advanced plan, then you can create SRV or CNAME records to create an custom server address.
Enjin's detailed guide on creating an SRV record can be found here:
http://support.enjin.com/hc/en-us/articles/200024719-Subdomains-for-Minecraft-servers