How do I split public /24 into subnets?

Hello,
I have a /24 public ip address. x.x.x.0/24

The data center I get service from takes care of BGP. I have a 1036 router and a Mikrotik switch.

I want to divide my /24 public ip address into servers in the cabinet like /28 /27 and give my customers limited ip blocks that they can use. How can I do this easiest? Thank you in advance for your help.