list( google = list( url = "https://dns.google.com/experimental", extra_params = list() ), cloudflare = list( url = "https://cloudflare-dns.com/dns-query", extra_params = list( cd = "false", do = "true", ct = "application/dns-json" ) ), quad9 = list( url = "https://dns.quad9.net/dns-query", extra_params = list() ), securedns_eu = list( url = "https://doh.securedns.eu/dns-query", extra_params = list( edns_client_subnet = NULL ) ), dnswarden_adblock = list( url = "https://doh.dnswarden.com/adblock", extra_params = list() ), dnswarden_uncensored = list( url = "https://doh.dnswarden.com/uncensored", extra_params = list() ), cleanbrowsing_security = list( url = "https://doh.cleanbrowsing.org/doh/security-filter/", extra_params = list(cd = "false") ), cleanbrowsing_family = list( url = "https://doh.cleanbrowsing.org/doh/family-filter/", extra_params = list() ), cleanbrowsing_adult = list( url = "https://doh.cleanbrowsing.org/doh/adult-filter/", extra_params = list() ), power_dns = list( url = "https://doh.powerdns.org", extra_params = list() ), appliedprivacy = list( url = "https://doh.appliedprivacy.net/query", extra_params = list() ) ) -> doh_servers