Have alsmost the same quection for weeks now.
Thought that Google was doing this to country code domains...now i see that actually the dn extesnion has nothing to do with this.
Your case maybe the reasult of domain expiration. In this case a possible reason would be that google removed all the info about this dn when expired, so now shows the previous number of results but not the actual results. Maybe an explanation like this would be the reason. If this dn wasn't expired I have no clue what the reason could be.
My case is even worst
Look at this :
http://www.google.com/search?q=cheats.nu shows 5k results....I have gone almost thru all pages and
most of the times the phrase to this dn is a link back to it
now if you tell google to show links with
link:cheats.nu
or
link:
www.cheats.nu
shows 3 links and 18 on the second case, lthough this dn has way more links ! I have many country code domains that have this problem and still never figure out why
When a .com dn expires google removes info about its linking..when a country code expires Google does not..must be unregistered to remove it..still can't figure out what's Google's secret is at such cases...