Public Domain Name Service (by ping)
Cloudflare (1.1.1.1)
Google (8.8.8.8)
HiNet (168.95.1.1)
HiNet (168.95.192.1)
TWNIC Quad101 (101.101.101.101)
CNS KBT (61.63.0.66)
Level 3 (4.2.2.1)
OpenDNS (208.67.222.222)
Verisign (64.6.64.6)
Comodo (8.26.56.26)
Quad9 (9.9.9.9)
SingNet (dnssec1.singnet.com.sg, 165.21.83.11)
CNNIC sDNS (1.2.4.8)
Baidu (180.76.76.76)
AliDNS (223.5.5.5)
