dnsbl

🛡️ Open-source and cloud-native Web Application Firewall (WAF)

A comprehensive, high-quality URL shorteners domain list for whitelist/allowlist or blacklist/blocklist purposes, utilized by NextDNS, ControlD, RethinkDNS, dnslow.me, and other OSINT projects.

(Temporarily out of service w.e.f 19 September 2026; ETA: ???) Malicious URLs identified by scanning various public URL sources using the Google Safe Browsing API (over 6 billion URLs scanned daily)

Domain Detective is a C# library, Tool and PowerShell module in one project. It is designed to help you find interesting information about a domain name.

Open-source project to monitor IPs & domains against 60+ blacklists, AbuseIPDB, DNS, SSL, DMARC, and more. Self-hosted, no vendor lock-in.

Async dnsbl spam lists checker based on asyncio/aiodns.

Prometheus compatible exporter to query DNSBLs/RBLs.

ThunderSec is a security plugin for Mozilla Thunderbird that creates several pieces of additional security functionality, including DNSBL, RBL, SURBL, DKIM and SPF.

YOURLS plugin: antispam plugin. Checks URL against major DNS black lists and removes all crap.

IP-Abuse Reporting System & IP/Network/ASN Risk-Databases

collection of scripts for harvesting & testing proxies

Machine-readable .txt blocklist of scam URLs and IP Addresses from the Global Anti Scam Organization (https://www.globalantiscam.org) website, updated once a day.

Generate malicious URL blocklists for DNSBL applications like pfBlockerNG or Pi-hole by scanning various public URL sources using the Safe Browsing API from Google and/or Yandex.

URL feed for blocking spamdexing websites. Let's banish them to the rubbish bin where they belong!

Query DNS-based blackhole lists

pfBlockerNG - IP and DNS blocking for pfSense

Archive copy of Stan Hoeppner's Postfix PCRE bot spam killer (fqrdns.pcre)

A complete, more than an RBL Management System

Checks if the given IP address(es) are listed at the given dnsrbl provider(s).

DNSBL checker written in Go