Before they got cloudflare they had the same A record and DNS servers as cloudboss.nu: 52.30.98.193

If you get the google cache of cloudboss.nu, you get this:
http://webcache.googleusercontent.com/search?q=cache:CUTuSSiEnYgJ:cloudboss.nu/+&cd=1&hl=en&ct=clnk&gl=dk
http://pastebin.com/0WSyxK45

We got three names here:
Jonas Olsen
René Jakobsen
Søren Appel Hansen

Also, we got some commented out HTML with:
WeNeverLoseIt.com
Storage4you ApS
Hovedvagtsgade 8, 2. Sal
DK- 1103 Copenhagen K
Telefonnummer :+45 36947003

If we look up Storage4you ApS, we get:
https://datacvr.virk.dk/data/visenhed?enhedstype=virksomhed&id=29142548&soeg=Storage4you&type=Alle

Relevant names:
Tim Antos Møllegaard
Ronnie Peer Gasseholm

Gotta be one or more of those, happy hunting.