Blocklists of Suspected Malicious IPs and URLs. Several organizations maintain and publish blocklists (a.k.a blacklists) of IP addresses and URLs free licensing options may be available; OpenPhish: Phishing sites ; free for. A blacklist considerably larger than most unmaintained blacklists ; Human A maintained 'add' list which ensures common 'bad' sites are always included Download · Search · Subscription, pricing & ordering · Submit modification. Right here and now you can check to see if your IP address is listed on an anti- spam database. Will your emails or forum chats get blocked? Below is a list of the.