Working DNS-over-TLS servers (9 March 2019)
From the DNS server list at dnsprivacy.org the following servers could be contacted. Others failed on connect or tls handshake.
| Cloudflare | 1.1.1.1 1.0.0.1 | cloudflare-dns.com | 
| Quad9 | 9.9.9.9 | quad9.net | 
| Adguard see https://adguard.com/en/blog/adguard-dns-announcement/ | 176.103.130.130 176.103.130.131 | dns.adguard.com for "Default" | 
| 176.103.130.132 176.103.130.134 | dns-family.adguard.com for "Family protection" | |
| BlahDNS | 108.61.201.119 | dot-jp.blahdns.com | 
| 159.69.198.101 | dot-de.blahdns.com | |
| UncensoredDNS | 89.233.43.71 | unicast.censurfridns.dk | 
| dkg | 199.58.81.218 | dns.cmrg.net | 
| securedns.eu | 146.185.167.43 | securedns.eu | 
| dns-tls.bitwiseshift.net | 81.187.221.24 | dns-tls.bitwiseshift.net | 
| dns.neutopia.org | 89.234.186.112 | dns.neutopia.org | 
| Lorraine Data Network | 80.67.188.188 | (no name, not certified by a root) | 
| www.hanewin.net | 09.Mar.2019 |