flagged VPNs

I have never used a VPN before but I have heard that VPN's can be flagged by Jagex, how do I find out which VPN's have been flagged?

 

if you are using a free one, make a throwaway account and play on it for a bit, if it gets banned instantly then obviously it's flagged. It's always risky if you're using a free vpn because it can get flagged during your play hours.
if you really wanna use a vpn get a paid dedicated vpn(you'll be the only owner).

 

You can't really find out. You should be safe when you buy a VPN/VPS from a non-related Runescape website.

 

none paid vpn is flagged

 

Yes, common VPN's like IPVanish and those common cheap VPN are definitely flagged.

Get a dedicated VPN.