It's very important to use other ports than the default 6667 whenever possible, since that port tends to be very busy. Try something else in the 6660-6669 range instead.
Many IRCnet servers allow none or few connections from users outside their domain, so try a server in your own country or at least close to you.
Even after you connect, the traditional /links command to get a server list will only show about 1/3 of the servers, since many servers are "masked" and not shown. So for example, although there are about 16 servers in Finland (.fi), unless you're already on a .fi server, /links or /links *.fi will show only the first one. You would need to do something like /links *.fi *.fi to see them all.
See also this troubleshooting guide for connecting to IRCnet (external link).
The following are all external links and will take you away from our site. We keep these lists because IRCnet lacks an official web site, so these sites have different degrees of stability and accuracy. (EFnet and IRCnet are the oldest networks. They actually predate notions of network founders and ownership, and are by necessity an ad hoc collection of servers with minimal central administration, so phrases like "official" can often be more about vanity than reality.)
IRCnet Server List: Semi-official
IRCnet Server List: another semi-official site
IRCnet Server Map
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