Best free and public DNS servers

Below are the updated* list of free public DNS servers,

DNS Provider	Primary DNS IP	Secondary DNS IP
Quad9	9.9.9.9	149.112.112.112
CloudFlare	1.1.1.1	1.0.0.1
OpenNIC	139.59.6.115	142.4.204.111
OpenDNS	208.67.222.222	208.67.220.220
Google DNS	8.8.8.8	8.8.4.4
DNS.Watch	84.200.69.80	84.200.70.40
Censurfridns \| UncensoredDNS	91.239.100.100	89.233.43.71
AdGuard	176.103.130.130	176.103.130.131
CleanBrowsing	185.228.168.168	185.228.169.168
VeriSign DNS	64.6.64.6	64.6.65.6
FreeDNS	172.104.49.100	37.235.1.174
Green Team DNS	81.218.119.11	209.88.198.133
COMODO DNS	8.26.56.26	8.20.247.20
Level3 (CenturyLink)	209.244.0.3	4.2.2.2
Yandex DNS	77.88.8.88	77.88.8.2
DYN DNS	216.146.35.35	216.146.36.36
SmartViper DNS	208.76.50.50	208.76.51.51
Tenta DNS	99.192.182.200	99.192.182.201
Fourth Estate	45.32.36.36	45.77.165.194
Neustar DNS	156.154.70.1	156.154.71.1
Hurricane Electric		74.82.42.42
SafeDNS	195.46.39.39	195.46.39.40
Alternate DNS**	198.101.242.72	23.253.163.53
Norton ConnectSafe	199.85.126.10	199.85.127.10
AliDNS	223.5.5.5	223.6.6.6
freenom DNS	80.80.80.80	80.80.81.81
puntCAT	109.69.8.51
OneDNS	117.50.11.11	117.50.22.22
Baidu DNS	180.76.76.76
114 DNS	114.114.114.114	114.114.115.115
DNSReactor	104.236.210.29	45.55.155.25

*Last updated on 1st April 2019

**Defunct on 1st May 2019

***Defunct on 15th November 2018