ALERT
Please submit new entries as pull requests to https://github.com/jauderho/nts-servers. This gist will eventually just point to the repo.
Initial source: https://docs.ntpsec.org/latest/NTS-QuickStart.html
Use this to verify connectivity (h/t @cadusilva)
chronyd -Q -t 3 'server NTP_SERVER_HERE iburst nts maxsamples 1'
Public
# Cloudflare (Anycast)
server time.cloudflare.com nts iburst
# System76
server virginia.time.system76.com nts iburst
server ohio.time.system76.com nts iburst
server oregon.time.system76.com nts iburst
# Netnod (Sweden)
server nts.netnod.se:4460 nts iburst # Anycast
server sth1.nts.netnod.se:4460 nts iburst # Stockholm
server sth2.nts.netnod.se:4460 nts iburst # Stockholm
# Physikalisch-Technische Bundesanstalt / PTB (Germany)
server ptbtime1.ptb.de nts iburst
server ptbtime2.ptb.de nts iburst
server ptbtime3.ptb.de nts iburst
# Time.nl (Netherlands)
server ntppool1.time.nl nts iburst
server ntppool2.time.nl nts iburst
Development (possibly unstable)
server ntpmon.dcs1.biz nts # Singapore
server ntp1.glypnod.com nts # San Francisco
server ntp2.glypnod.com nts # London
Others (unverified)
server pi3.rellim.com nts
server kong.rellim.com nts
server ntp.qontinuum.space nts # Monaco?
Hey, if you search for other servers to add to your list I am hosting a tier 2 NTS server at ntp.qontinuum.space on port 4460.
You may also want to add netnod.se servers that you can find here: