For similar game modes, see Rust 24/7 and Shipment 24/7.
Transit 213 Menu Screen
"Moshpit of Core 6v6 modes"
— Playlist description
Transit 213 24/7 was a Game Mode featured in Call of Duty: Modern Warfare 4 that was released on August 23rd, 2026. The game mode acts similar to modes such as Shoot House 24/7 and features only the map, Transit 213 on the modes Team Deathmatch, Kill Confirmed, Hardpoint, Domination and Inflation. It was a 6v6 playlist, however didn't feature a Hardcore variant.
Following an update on August 30th, 2026, the score limits of Team Deathmatch and Kill Confirmed were increased to 150 and 100 respectively.
Source: https://callofduty.fandom.com/wiki/Transit_213_24/7. This is an independent Call of Duty: Modern Warfare 4 reference page.