I'm having way too much fun following the @
vncresolver@fedi.computernewb.com mastadon account. It's, as you'd surmise, a collection of open VNC servers on the net.
VNC Resolver
@
vncresolver@fedi.computernewb.com
IP Address: 212.193.134.139
Port: 5901
Location: Ufa, Bashkortostan Republic
ASN: AS9077 Federal State Budgetary Scientific Institution Ufa
Federal Research Center of the Russian Academy of Sciences
(complete with a screen shot!)