DayZ
Chernarus servers
Online count loads with the directory.
The coast-to-northwest loop is why Chernarus still holds most of the people playing DayZ. Elektro, Chernogorsk, and Berezino are where fresh spawns learn the roads. Inland, the northwest airfield and Tisy are where geared groups go to lose it. Everyone already knows the route, so a populated Chernarus server is easy to read: the coast is noisy at wipe, the northwest is noisy once people are armed.
This list uses the directory map code chernarusplus. A few servers report the same map as ChernarusPlus. They are included here. Official and community servers both run it. A community hive does not share your official character.
If you want the default DayZ experience, start here. The browser can narrow the same map by country, player count, or a missing password.