Webpage=datacoininfo.org or datacoin.info
Example address=any of these: www.bytestamp.net/blocks/lunsp
Conflicts=already listed on CMC - coinmarketcap.com/currencies/datacoin
Bitcointalk OP: https://bitcointalk.org/index.php?topic=325735.0
The developer disappeared, but there is still an active community around this early coin (launched 2013). On any day at least 15 nodes are mining the coin.
Read this topic on how to add it. Don’t forget the pull request or the coin won’t be added.