Yeah, I feel you on that. I've been through the same thing—had a bunch of bookmarks that just disappeared. Honestly, I've had decent luck with IPQualityScore lately. It's free and pretty accurate for checking reputation and blacklist status. AbuseIPDB is solid too if you're looking at abuse reports specifically.
If you don't mind dropping a few bucks, MaxMind is the gold standard, but it might be overkill depending on what you need. For quick checks, I usually just run stuff through a couple free ones to cross-reference. Saves time and catches most issues. Hope you find what you're looking for!