which site to use to report bad IP (spammer, exploiter, ddos)?

I found following services so far:
https://www.abuseipdb.com (download whole large blacklist database link: https://www.abuseipdb[d0t]com/blocklist)
https://myip.ms/browse/blacklist/Blacklist_IP_Blacklist_IP_Addresses_Live_Database_ Real-time (registration needed)
http://stopforumspam.com (SPAM only DB)
https://iplists.firehol.org (can not report IP, just source of many IP blocklists)

If have evidence of an illegal activity from some IP, one can report it to the IP owner (search IP at http://myip.ms to get details and e-mail of the owner)