diff --git a/bacnet-stack/utils/address_cache b/bacnet-stack/utils/address_cache
new file mode 100644
index 00000000..83b64bee
--- /dev/null
+++ b/bacnet-stack/utils/address_cache
@@ -0,0 +1,2 @@
+55555 AC:10:56:06:BA:C0 26001 19 50
+