On 1 servers with real players, out of 2 Steam servers that run it now, fakes and empty ones included. Checked 13:06 UTC.
hns_devblocks is a community map, not one of the maps that come with the game. Servers send it to players from the Workshop when they join.
Over the last 30 days hns_devblocks was the #1126 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 3 people play it on 1 servers, most of them on servers in Russia. It is busiest on Monday around 15:00 UTC and quietest on Monday around 00:00 UTC.
Right now 3, on 1 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 Monday around 15:00 UTC. The grid above shows every hour of the week in your own time zone.
The busiest right now: CS2 HNS #5 [RU] — CYBERSHOKE.NET (RULES) (3 players), FAN|HNS训练服|小跳支持|FUNJUMP|KZpre (0 players). The full list is under "Servers running it now", and every server has its own page with its history.
de_mirage43,215 players on average
de_dust217,899 players on average
sandstone_fb14,453 players on average
de_mirage_fps6,330 players on average
awp_lego_25,435 players on average
awp_lego_2_fb4,833 players on average
de_mirage_christmas2,854 players on average
<null>1,275 players on average
bhop_emevaelx31,055 players on average
duels_mirage_1x11,009 players on average
de_inferno889 players on average
de_nuke745 players on average