The following was posted by pershing on the UPN Areas thread at the Roswell 2 board:
As of 9/25/01, the best way to locate Roswell on your local TV is to go to TV Guide Online, click on ‘TV Listings’, put in your local information and then do a search for Roswell.
If Roswell isn’t listed, search for Buffy or Enterprise. The station that lists new episodes for them, is the station that could also air Roswell (with a little convincing).
TV Guide Online is now international too so all of us can use it! :-)
Also, please remember to go to the following link for the latest updates on various areas of the country receiving UPN or Roswell. There have been many developments so make sure you skim the entire thread!: