Near

Description
Players in-game can use the /near command to view who is nearby.

Command
/near

Action: Will show all player names, their ranks, and their distance in blocks (m) in your chat only.

Players nearby:(Buddy) JumboCookie(5m)

Note: this command will only show players within 200 blocks from you. If there are a lot of players nearby, you may need to scroll through chat to see the complete list.