See: https://www.blockedservers.com/blocked/ipv4/37.48.117.6/ (on two blocklists)
and various flags here: https://www.stopforumspam.com/ipcheck/37.48.117.6
See: http://www.ip-finder.me/37.48.117.6/
Found in database: http://www.abuseipdb.com/check/37.48.117.6
Recent abuse: http://www.projecthoneypot.org/ip_37.48.117.6
Spam activity on 21 sites: https://cleantalk.org/blacklists/37.48.117.6
Detections: http://www.reputationauthority.org/lookup.php?ip=37.48.117.6&d=hotmail.com
Flagged: http://www.liveipmap.com/37.48.117.6
Listed here: http://vip-socks24.blogspot.nl/2015/02/21-02-15-vip-socks-5-servers-590.html
& http://www.live-socks.net/2015/02/23-02-15-socks-5-servers-830_23.html
polonus