Can't Find Servers

[ColonelMerkur]

So I was trying to find a server, but I couldn't find one! The advertised box said yes and I clicked Find Servers many times but no server would pop up. I quit OpenTTD several times and even tried to reinstall the whole game, but still, the damn thing won't find a server.

[planetmaker]

OpenTTD will only show servers which have exactly the same version as you are running. Do you run any official version or JGR's patch pack?

Usually you'll only find servers running the current or some of the most recent versions as servers are being updated.
http://servers.openttd.org/en/

Also check that your router/modem allows traffic on the required ports
OpenTTD uses TCP and UDP port 3979 for server <-> client communication, TCP port 3978 for content service, a.k.a. BaNaNaS (outbound)

Should you run a server yourself, add also UDP port 3978 for masterserver (advertise) communication (outbound)

Cheers,
pm