Some say it's "bad", some say it's "good", without giving further details. Because of that, I will label this site as "Probably safe" even if I think it's Secure and Trusted since I've been using it.

No security concerns to report.

Trusted by many, especially in the SEO community.

Used for checking spamy domains, SpamHaus is also safe to use.

Virus free domain (0/79 scans passed) and Spamhaus passed (not in their DBL). Must follow for further checks.