I have both a ".net" and a ".com" address for the Same Website.....

[B24Group]

I have mysite.net and mysite.com......They are both the same age, however, we always had it so that the mysite.com address forwarded to the mysite.net address. The mysite.net address was our main address forever.

We recently reversed that and made the mysite.com address the main address and just have mysite.net forward to the mysite.com address.

I'm wondering if this change will affect our rankings since a lot of the backlinks we've acquired are actually pointing to mysite.net and not mysite.com (our new main address)???

[DanDeceuster]

Also make sure you 301 redirect every page of the old site to its counterpart on the new .com site. So many people just redirect their home page but forget about the rest or don't know how to do it right. And you don't just want all your old pages redirecting to the new home page. Every page should go to it's .com counterpart. Make sure that is going on and that will help you avoid losing too much in the rankings.

[StalkerB]

Yes, you'll almost certainly lose some rankings for a while.

301 redirects do lose some of their value (and I hope you've done that already) and you'll take a knock while the search engines figure out what's going on.

Since it's all done you should start building new links to the new URL as soon as possible.

[MarloSchneider]

Well if you 301 redirected the mysite.net to themysite.com then the links will use value, I have heard they lose somewhere around 5% of their value to the redirected domain.