diff --git a/test_email.sh b/test_email.sh
index fbfbf4f..2790c4e 100755
--- a/test_email.sh
+++ b/test_email.sh
@@ -20,21 +20,21 @@ fi
 if [[ -n "${EXTERN_IPv4}" ]] ; then
    if [[ "${EXTERN_IPv4}" =~ ^10\. ]] \
       || [[ "${EXTERN_IPv4}" =~ ^172\.16\. ]] \
-      || [[ "${EXTERN_IPv4}" =~ ^172\.16\. ]] \
-      || [[ "${EXTERN_IPv4}" =~ ^172\.16\. ]] \
-      || [[ "${EXTERN_IPv4}" =~ ^172\.16\. ]] \
-      || [[ "${EXTERN_IPv4}" =~ ^172\.16\. ]] \
-      || [[ "${EXTERN_IPv4}" =~ ^172\.16\. ]] \
-      || [[ "${EXTERN_IPv4}" =~ ^172\.16\. ]] \
-      || [[ "${EXTERN_IPv4}" =~ ^172\.16\. ]] \
-      || [[ "${EXTERN_IPv4}" =~ ^172\.16\. ]] \
-      || [[ "${EXTERN_IPv4}" =~ ^172\.16\. ]] \
-      || [[ "${EXTERN_IPv4}" =~ ^172\.16\. ]] \
-      || [[ "${EXTERN_IPv4}" =~ ^172\.16\. ]] \
-      || [[ "${EXTERN_IPv4}" =~ ^172\.16\. ]] \
-      || [[ "${EXTERN_IPv4}" =~ ^172\.16\. ]] \
-      || [[ "${EXTERN_IPv4}" =~ ^172\.16\. ]] \
-      || [[ "${EXTERN_IPv4}" =~ ^172\.16\. ]] \
+      || [[ "${EXTERN_IPv4}" =~ ^172\.17\. ]] \
+      || [[ "${EXTERN_IPv4}" =~ ^172\.18\. ]] \
+      || [[ "${EXTERN_IPv4}" =~ ^172\.19\. ]] \
+      || [[ "${EXTERN_IPv4}" =~ ^172\.20\. ]] \
+      || [[ "${EXTERN_IPv4}" =~ ^172\.21\. ]] \
+      || [[ "${EXTERN_IPv4}" =~ ^172\.22\. ]] \
+      || [[ "${EXTERN_IPv4}" =~ ^172\.23\. ]] \
+      || [[ "${EXTERN_IPv4}" =~ ^172\.24\. ]] \
+      || [[ "${EXTERN_IPv4}" =~ ^172\.25\. ]] \
+      || [[ "${EXTERN_IPv4}" =~ ^172\.26\. ]] \
+      || [[ "${EXTERN_IPv4}" =~ ^172\.27\. ]] \
+      || [[ "${EXTERN_IPv4}" =~ ^172\.28\. ]] \
+      || [[ "${EXTERN_IPv4}" =~ ^172\.29\. ]] \
+      || [[ "${EXTERN_IPv4}" =~ ^172\.30\. ]] \
+      || [[ "${EXTERN_IPv4}" =~ ^172\.31\. ]] \
       || [[ "${EXTERN_IPv4}" =~ ^192\.168\. ]] ; then
       
       PUBLIC_IPv4="$(wget -qO- https://meine-ip.oopen.de 2> /dev/null)"