diff --git a/libraries/NetBIOS/src/NetBIOS.cpp b/libraries/NetBIOS/src/NetBIOS.cpp
index 6d3f274a137..ca2c29a4c4d 100644
--- a/libraries/NetBIOS/src/NetBIOS.cpp
+++ b/libraries/NetBIOS/src/NetBIOS.cpp
@@ -1,5 +1,8 @@
 #include "NetBIOS.h"
 #include <functional>
+extern "C" {
+#include <lwip/netif.h>
+};  // extern "C"
 
 #define NBNS_PORT             137
 #define NBNS_MAX_HOSTNAME_LEN 32
@@ -91,7 +94,16 @@ void NetBIOS::_onPacket(AsyncUDPPacket &packet) {
         append_32((void *)&nbnsa.ttl, 300000);
         append_16((void *)&nbnsa.data_len, 6);
         append_16((void *)&nbnsa.flags, 0);
-        nbnsa.addr = packet.localIP();
+        nbnsa.addr = packet.localIP();  // By default, should be overridden below
+        // Iterate over all netifs, see if the incoming address matches one of the netmaskes networks
+        for (auto netif = netif_list; netif; netif = netif->next) {
+          auto maskedip = ip4_addr_get_u32(netif_ip4_addr(netif)) & ip4_addr_get_u32(netif_ip4_netmask(netif));
+          auto maskedin = ((uint32_t)packet.localIP()) & ip4_addr_get_u32(netif_ip4_netmask(netif));
+          if (maskedip == maskedin) {
+            nbnsa.addr = ip4_addr_get_u32(netif_ip4_addr(netif));
+            break;
+          }
+        }
         _udp.writeTo((uint8_t *)&nbnsa, sizeof(nbnsa), packet.remoteIP(), NBNS_PORT);
       }
     }