/32 Host address range access rule

Im trying to allow a specific host in an range of subnets with an access rule using AFM. An address list is an option but there are around 100 sites. I was hoping for a better solution than creating a long list. I didn't see a good way to do this in the config utility or mention in the documents I found. For example the second octet is the site/building specific subnet:

 

Allow: 10.0.100.100, 10.1.100.100, 10.2.100.100, 10.3.100.100.... 10.255.100.100 to server 192.168.100.100 port 1234

 

Is there an simpler way to create such an access rule?

 

Thanks