Where can I find domains banned/penalized from google search engine. I tried manually on ismywebsitepenalized dot com but it's very hard to find those domains. Also it might be domain with high spam score on moz 15/17. Anyway it seems really hard to find those domains. For checking I used expiried domains dot net I expected that domains with higher number of backlink will be on penalized list but it's not the case.
Is there easier way to find it?