BIND9 dns querys accross subnets?

I am trying to setup a bind 9 dns server. I currently can make it so that I will serve anyone who is in the direct subnet of the server. Example 192.168.0.2 is my dns server. If I make a DNS call from the machine hosting the server It resolves fine. But if I had a machine at 192.167.2.4 and I wanted them to be able to query the server as well how do I manage this. The address of the machines accessing the server can vary in any of the bottom 3 octets so I can’t just declare zones for each. Thanks for any help in advance.