Interesting...I ran the command and got countless entries but I had recently being running Sky Anytime which is known to have peer to peer technology. I ended the Sky related services and the entries reduced to 4. I then decided to reboot my laptop and when I ran the netstat command again got 3 entries.
Have you tried running the command immediately after booting up.
I don't know the answer to your question but I suppose this could indicate something untoward is leaching your bandwidth.
Now I only have 2 entries...now one...?