Dnsupdate-rfc2136 NAME_TEMPLATE with host label

Hi,
is there any way how to add host label to NAME_TEMPLATE ? I have different “region” label (eu/us/…) on hosts and want to use it in dns string like this:

NAME_TEMPLATE %{{service_name}}.%{{stack_name}}.%{{environment_name}}.%{{region}}

is there any way how to get this variable to macro ?