My other domains showing up as sources? Huh?

[Redd Vinylene]

hey, i got a lot of domains im not using.. for some reason they keep
showing up in my log/production.txt

Processing MainController#index (for 80.252.2.3 at 2008-07-30 00:11:26) [GET]
  Session ID: e6e3dee8afc8a6152ffdf3e51e7ab82d
  Parameters: {"action"=>"index", "controller"=>"main"}
Rendering template within layouts/front
Rendering main/index
Completed in 0.01081 (92 reqs/sec) | Rendering: 0.00358 (33%) | DB:
0.00240 (22%) | 200 OK [http://www.oneofmydomains.com/]

...

Completed in 0.01081 (92 reqs/sec) | Rendering: 0.00358 (33%) | DB:
0.00240 (22%) | 200 OK [http://www.anotherdomain.com/]

...

Completed in 0.01081 (92 reqs/sec) | Rendering: 0.00358 (33%) | DB:
0.00240 (22%) | 200 OK [http://www.andanother.com/]

anybody got a clue? thanks