diff --git a/src/source_rules.py b/src/source_rules.py
index a227d88..05d4843 100644
--- a/src/source_rules.py
+++ b/src/source_rules.py
@@ -169,13 +169,27 @@ def _normalize_url(url: str) -> str:
     return url
 
 
+# Subdomain → kanonische Domain Zuordnung
+_DOMAIN_ALIASES = {
+    "feeds.bbci.co.uk": "bbc.com",
+    "rss.sueddeutsche.de": "sueddeutsche.de",
+    "on.orf.at": "orf.at",
+    "rss.orf.at": "orf.at",
+    "rss.dw.com": "dw.com",
+    "newsfeed.zeit.de": "zeit.de",
+    "reutersagency.com": "reuters.com",
+    "edition.cnn.com": "cnn.com",
+    "rsshub.app": "apnews.com",
+}
+
+
 def _extract_domain(url: str) -> str:
-    """Domain aus URL extrahieren (ohne www.)."""
+    """Domain aus URL extrahieren (ohne www., mit Alias-Normalisierung)."""
     parsed = urlparse(url)
     domain = parsed.hostname or ""
     if domain.startswith("www."):
         domain = domain[4:]
-    return domain
+    return _DOMAIN_ALIASES.get(domain, domain)
 
 
 def _detect_category(domain: str) -> str: