To determine which subways are currently running, you can check the MTA website or SubwayStats.com. The MTA website provides information on service changes and delays for the subway, bus, and rail systems. SubwayStats.com shows the current status, delays, statistics, and closures for each train as reported by the MTA. Additionally, the MTA Live Subway Map provides real-time information on subway routes, train arrival times, service alerts, and emergency updates.

Its worth noting that the NYC subway system runs 24 hours a day, 7 days a week. However, there may be service changes or suspensions due to weather, construction, or other factors. Therefore, its important to check for updates before traveling on the subway.