Domain name instead ip

[euskosoft]

I have hosted the game in a home server with dynamic ip, to solve it I use the noip.com service and my domain name is f1race.sytes.net

I would like to know if I can change domain name instead of ip. I have tried it but after "add server" the banner shows the current ip of the pc in the html code. I have tried to change the ip to the domain name in the code, but it doesnt work.

Any solution? Thanks.