Check if a domain or IP is listed on major DNS blacklists.
Check if a domain or IP address appears on DNS-based blacklists used to block spam and malicious activity.
Check against Spamhaus ZEN, SpamCop, Barracuda, UCEPROTECT, and Abusix.
Query SURBL, Spamhaus DBL, and URIBL for domain reputation.
Resolve domain IPs and check both domain and IP blacklists simultaneously.