diff --git a/create_zone_file.sh b/create_master_zone_file.sh
similarity index 98%
rename from create_zone_file.sh
rename to create_master_zone_file.sh
index 79fd0c2..978cd77 100755
--- a/create_zone_file.sh
+++ b/create_master_zone_file.sh
@@ -231,6 +231,19 @@ containsElement () {
    return 1
 }
 
+get_domain_by_hostname() {
+
+   _domain=$1
+   _tmp_domain="${_domain#*.}"
+
+   while [[ "$_tmp_domain" =~ \. ]]; do
+      _domain="$_tmp_domain"
+      _tmp_domain="${_domain#*.}"
+   done
+
+   echo $_domain
+}
+
 is_number() {
 
    return $(test ! -z "${1##*[!0-9]*}" > /dev/null 2>&1);
@@ -678,7 +691,7 @@ cat << EOF > "${ZONE_FILE_MASTER_DIR}/${DOMAIN}.zone"
 ; - domain: ${DOMAIN}
 ; -
 \$TTL 43200
-@ 86400 IN SOA ${NS_HOST_1}. admin.warenform.net. (
+@ 86400 IN SOA ${NS_HOST_1}. admin.$(get_domain_by_hostname "${NS_HOST_1}"). (
                     $(date +%Y%m%d01)  ; serial
                     14400       ; refresh
                     3600        ; retry