diff --git a/contrib/seeds/makeseeds.py b/contrib/seeds/makeseeds.py
index 79a243ba52..e1aef34e85 100755
--- a/contrib/seeds/makeseeds.py
+++ b/contrib/seeds/makeseeds.py
@@ -19,8 +19,9 @@ MAX_SEEDS_PER_ASN=4
 
 # These are hosts that have been observed to be behaving strangely (e.g.
 # aggressively connecting to every node).
-SUSPICIOUS_HOSTS = {
-}
+with open("suspicious_hosts.txt", mode="r", encoding="utf-8") as f:
+    SUSPICIOUS_HOSTS = {s.strip() for s in f if s.strip()}
+
 
 PATTERN_IPV4 = re.compile(r"^((\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})):(\d+)$")
 PATTERN_IPV6 = re.compile(r"^\[([0-9a-z:]+)\]:(\d+)$")
diff --git a/contrib/seeds/suspicious_hosts.txt b/contrib/seeds/suspicious_hosts.txt
new file mode 100644
index 0000000000..e69de29bb2