These appear to be some ip addresses used by dmf:

66.223.177.116
206.174.121.150
54.184.173.221

You sure about that? At least one of those is in my home town...

Do you ever run an exit node for TOR?

Yeah I occasionally run a tor relay/exit node. I know a few other people that do up here too...

The Tor node has only been up for 2 days (https://atlas.torproject.org/#details/12DCC36E626A235ED8EE0D3527405006A21BAC0E). So it was made the day after this reply.

Sounds about right, IP addresses up here change periodically.

So, what are the other IP addresses that have been used to run your exit node?

How would I know that? Whatever my current IP is would be the one of my exit node.