How to apply filter on ipv4 type?

Hi, I’m trying to apply a partial search filter on an attribute type ipv4.
I give an example, I have a list of ip belonging to the same subnet that all starts for example as 127.1.x.x. How do I filter all those ip? I’ve tried to add filter using “contains” but field requires the whole IP, otherwise goes into error. I’m using 3.1.1 Cmdbuild version and I’ve also tried with a test on 3.2 version but filter on ipv4 does not work like others attribute’s type. Is there a way to do this?
Thanks, really appreciate your help