I can't use subnetting on Networks

In the Networks->Networks section I tried to add my range of public IPs, but it won’t let me.
I get the following error:
I can only add networks that end in .0
How can I do it?

Hi @Juanpebalsa - the network address you’re interested in is probably

Maybe, I’ll check it out.

Ok, it was a mistake of mine, sorry for the inconvenience.