https://knowledge.validity.com/hc/en-us/sections/204468388-Blocklists
https://github.com/zbetcheckin/DNSBLs
https://en.wikipedia.org/wiki/Comparison_of_DNS_blacklists
+ https://www.impressionwise.com/kb/threats/rbl-advisories.html
00_ELANG
http://dnsbl.aspnet.hu/
hungarian?