diff --git a/public_suffix_list.dat b/public_suffix_list.dat
index 43dc53707..b5f673ca3 100644
--- a/public_suffix_list.dat
+++ b/public_suffix_list.dat
@@ -11201,6 +11201,12 @@ zuerich
 // ===BEGIN PRIVATE DOMAINS===
 // (Note: these are in alphabetical order by company name)
 
+// 12CHARS: https://12chars.com
+// Submitted by Kenny Niehage <psl@12chars.com>
+12chars.dev
+12chars.it
+12chars.pro
+
 // 1GB LLC : https://www.1gb.ua/
 // Submitted by 1GB LLC <noc@1gb.com.ua>
 cc.ua