See: https://www.spamhaus.org/sbl/listings/cloudflare.com
SBL529051 172.67.166.126 cloudflare.com 2021-08-02 Selling access to hacked server proxies to cybercriminals: vn5socks.net
SBL528720 172.67.167.41 cloudflare.com 2021-07-29 Carding fraud site/forum: altenen.is / altenen.sk / altenen.st / altenen.pro / alboraaq.com
SBL526410 172.67.167.83 cloudflare.com 2021-07-28 Carding fraud site/forum: cardhouse.africa / cardhouse.one / topccworld.cc / scan.rodeo
SBL526391 172.67.167.222 cloudflare.com 2021-07-03 Carding fraud site/forum: jstash.bazar.sx / jstash.bazar.shop
SBL526365 172.67.166.236 cloudflare.com 2021-07-03 Carding fraud site/forum: scans24.com
SBL525486 172.67.166.12 cloudflare.com 2021-07-01 Spamvertised domain/redirector hosting
SBL522814 172.67.164.0/23 cloudflare.com 2021-07-22 Hosting carding fraud sites/forums, reports ignored
SBL520068 172.67.167.237 cloudflare.com 2021-04-02 Botnet spammed scam business & phish domains
SBL518213 172.67.164.6 cloudflare.com 2021-03-06 Carding fraud site/forum: UNICC.CZ (uniccshop.cm / cardpin.org / crdshop.su / cclub.su / unicc.am / csu.su / abusehost.pro / dumpscrew.com / chindadump.su / dumpshop.net / dumpshop.cc)
SBL503088 172.67.166.248 cloudflare.com 2020-12-14 inboxpartners.com
SBL496250 172.67.166.176 cloudflare.com 2020-09-28 Spamvertised website
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Also:
SBL529049 172.67.222.85 cloudflare.com 2021-08-02 Selling access to hacked server proxies to cybercriminals: shopsocks5.com
SBL526387 172.67.220.78 cloudflare.com 2021-07-03 Carding fraud site/forum: database-market.shop
SBL525483 172.67.223.219 cloudflare.com 2021-07-01 Spamvertised domain/redirector hosting
SBL525132 172.67.222.222 cloudflare.com 2021-06-16 affiliate spam @getsugarbalance.com
SBL524600 172.67.222.138 cloudflare.com 2021-06-14 Malware distribution @172.67.222.138
SBL520823 172.67.221.126 cloudflare.com 2021-05-22 Spammer hosting
SBL505321 172.67.220.79 cloudflare.com 2021-07-03 affiliate spam @bigcitydating1.club
SBL502088 172.67.222.67 cloudflare.com 2021-02-25 Zoltán Zarka
Spamvertised website
SBL495325 172.67.222.109 cloudflare.com 2020-09-17 Spamvertised website