Blackbox dns query

I am looking for some assistance in seting up blackbox_exporter to query websites AND DNS servers. Similar in the way that Cacti and Smokeping will do it.

HTTP/HTTPs querying works just fine. But here is what I have for my DNS prober.

    prober: dns
    timeout: 10s
      preferred_ip_protocol: "ip4"
      ip_protocol_fallback: false
      transport_protocol: "udp"

Do I have to specify the DNS record? Is there a way for it to be a catch-all? I have 5 websites configured in a yml file for http probing.