Mystery Port Opened by My SQL Server

I have a clustered instance of SQL Server 2008 R2 (64-bit). My information security group contacted me about a previously unnoticed open port: 52849. The port is attached to the SQL Server process on my machine, which is PID 1004:

C:\>netstat -ano | findstr 52849
  TCP    0.0.0.0:52849          0.0.0.0:0              LISTENING       1004
  TCP    [::]:52849             [::]:0                 LISTENING       1004
C:\>tasklist | findstr sql
sqlbrowser.exe                2624 Services                   0      2,368 K
sqlwriter.exe                 2764 Services                   0      9,708 K
sqlservr.exe                  1004 Services                   0 62,050,528 K

I don't see the port mentioned in my error log. It isn't the port the instance is listening on. It isn't the service broker port.

Does anyone have a good way to track this down?

Cheers,
Adam

Adam