On 0 servers with real players, out of 1 Steam servers that run it now, fakes and empty ones included. Checked 15:07 UTC.
kz_claustrophobia is a KZ (climb) map: you jump your way to the end as fast as you can. It is not one of the maps that come with the game, so servers send it to players from the Workshop when they join.
Over the last 30 days kz_claustrophobia was the #1685 map on CS2 community servers, with <1 real players on it at any moment on average - 0% of everyone playing. It ran on about <1 servers with real players at a time. Right now 0 people play it on 0 servers. It is busiest on Sunday around 14:00 UTC and quietest on Monday around 03:00 UTC.
Right now 0, on 0 servers from the Steam server list. Over the last 30 days it had <1 real players on average at any moment. Fake servers and bots are not counted, and Valve matchmaking is not in the list.
On Sunday around 14:00 UTC. The grid above shows every hour of the week in your own time zone.
The busiest right now: CS2 KZ #170 [UA] — CYBERSHOKE.NET (TIER 6-10 - HARD) (0 players). The full list is under "Servers running it now", and every server has its own page with its history.
de_mirage43,290 players on average
de_dust217,888 players on average
sandstone_fb14,480 players on average
de_mirage_fps6,344 players on average
awp_lego_25,449 players on average
awp_lego_2_fb4,849 players on average
de_mirage_christmas2,856 players on average
<null>1,275 players on average
bhop_emevaelx31,054 players on average
duels_mirage_1x11,006 players on average
de_inferno888 players on average
de_nuke763 players on average