With zerotier, you can join many networks. These networks are not necessarily owned by you. The owner might not want all of it’s IP addresses exposed to every one. That info is not distributed to the client.
I feel your pain about not wanting to memorize ip addresses.
Here are some ideas:
manually assign IPs in some order you like 10.10.0.1, 10.10.0.2
make a list*. the addresses never change unless you change them.