dns_max_ttl
dns_min_ttl
dns_mean_ttl
dns_num_ns_records
dns_num_unique_ns_domains
dns_has_soa_record
dns_num_unique_ips
dns_resolves
dns_num_a_records
ip_num_ipv4
dns_num_txt_records
ip_num_resolved_ips
ip_has_public_ip
tls_days_to_expiration
dns_num_mx_records
tls_validity_period_days
tls_num_san_domains
tls_certificate_age_days
tls_any_san_matches_host
rdap_domain_age_days