Can the ISP (or anyone spying on my WIFI network) see which VPN IP I’m connecting to?

I know that even when connected to a VPN, the ISP (or anyone who controls my WIFI network) could see that I am connected to (A VPN brand), what I would like to know is would they obtain the exact IP that I’m connected to.

As a side note, what could the ISP really see when I use VPN? I imagine packet size and frequency should be compromised, but what else? (MAC? hostname? DNS info?)