diff --git a/files/helpers/sanitize.py b/files/helpers/sanitize.py
index 4a82cfcf9c..cb0345212b 100644
--- a/files/helpers/sanitize.py
+++ b/files/helpers/sanitize.py
@@ -366,7 +366,8 @@ def sanitize(sanitized, golden=True, limit_pings=0, showmore=True, count_marseys
 		href = link.get("href")
 		if not href: continue
 		url = urlparse(href)
-		domain_list.add(url.netloc + url.path)
+		d = tldextract.extract(href).registered_domain + url.path
+		domain_list.add(d)
 
 	banned_domains = g.db.query(BannedDomain).all()
 	for x in banned_domains:
diff --git a/files/routes/posts.py b/files/routes/posts.py
index 64fc3208d3..c098970777 100644
--- a/files/routes/posts.py
+++ b/files/routes/posts.py
@@ -783,7 +783,7 @@ def submit_post(v, sub=None):
 		if repost and FEATURES['REPOST_DETECTION'] and not v.admin_level >= PERMS['POST_BYPASS_REPOST_CHECKING']:
 			return redirect(repost.permalink)
 
-		y = domain + parsed_url.path
+		y = tldextract.extract(url).registered_domain + parsed_url.path
 		banned_domains = g.db.query(BannedDomain).all()
 		for x in banned_domains:
 			if y.startswith(x.domain):