diff --git a/src/apps/mdns/mdns.c b/src/apps/mdns/mdns.c
index 36238570..5eb79206 100644
--- a/src/apps/mdns/mdns.c
+++ b/src/apps/mdns/mdns.c
@@ -2483,6 +2483,18 @@ mdns_resp_rename_netif(struct netif *netif, const char *hostname)
   return ERR_OK;
 }
 
+/**
+ * @ingroup mdns
+ * Checks if an MDNS responder is active for a given network interface.
+ * @param netif The network interface to test.
+ * @return nonzero if responder active, zero otherwise.
+ */
+int
+mdns_resp_netif_active(struct netif *netif)
+{
+	return NETIF_TO_HOST(netif) != NULL;
+}
+
 /**
  * @ingroup mdns
  * Add a service to the selected network interface.
diff --git a/src/include/lwip/apps/mdns.h b/src/include/lwip/apps/mdns.h
index e8c1ef9e..33da4a3e 100644
--- a/src/include/lwip/apps/mdns.h
+++ b/src/include/lwip/apps/mdns.h
@@ -110,6 +110,7 @@ void mdns_resp_register_name_result_cb(mdns_name_result_cb_t cb);
 err_t mdns_resp_add_netif(struct netif *netif, const char *hostname);
 err_t mdns_resp_remove_netif(struct netif *netif);
 err_t mdns_resp_rename_netif(struct netif *netif, const char *hostname);
+int mdns_resp_netif_active(struct netif *netif);
 
 s8_t  mdns_resp_add_service(struct netif *netif, const char *name, const char *service, enum mdns_sd_proto proto, u16_t port, service_get_txt_fn_t txt_fn, void *txt_userdata);
 err_t mdns_resp_del_service(struct netif *netif, u8_t slot);