diff --git a/README.md b/README.md
index 1fca72f..786f8da 100644
--- a/README.md
+++ b/README.md
@@ -237,6 +237,9 @@ A curated list of awesome malware analysis tools and resources. Inspired by
   about an IP or domain by searching online resources.
 * [SenderBase](http://www.senderbase.org/) - Search for IP, domain or network
   owner.
+* [SpamCop](https://www.spamcop.net/bl.shtml) - IP based spam block list.
+* [SpamHaus](http://www.spamhaus.org/lookup/) - Block list based on
+  domains and IPs.
 * [Sucuri SiteCheck](https://sitecheck.sucuri.net/) - Free Website Malware
   and Security Scanner.
 * [TekDefense Automator](http://www.tekdefense.com/automater/) - OSINT tool