diff --git a/backend/routers/discovery.py b/backend/routers/discovery.py
index ecc562a..46e9e8b 100644
--- a/backend/routers/discovery.py
+++ b/backend/routers/discovery.py
@@ -71,7 +71,8 @@ def _ping(ip: str) -> bool:
         # Guard against proxy-ARP / gateway false positives: verify the ICMP
         # reply actually came from the target IP and not an intermediate node.
         stdout = r.stdout.decode(errors="ignore")
-        return f"from {ip}:" in stdout or f"from {ip} " in stdout
+        # Also handles "from hostname (ip):" format when DNS resolves the target
+        return f"from {ip}:" in stdout or f"from {ip} " in stdout or f"({ip}):" in stdout
     except Exception:
         return False