This is intended to bootstrap a list of NTP servers with NTS support given that NTS support is not currently widespread. Pull requests are welcome to add new sources. Please adhere to the format.
| Hostname | Stratum | Location | Owner | Notes |
|---|---|---|---|---|
| time.cloudflare.com | 3 | All | Cloudflare | Anycast |
| a.st1.ntp.br | 1 | Brazil | ntp.br | |
| b.st1.ntp.br | 1 | Brazil | ntp.br | |
| c.st1.ntp.br | 1 | Brazil | ntp.br | |
| d.st1.ntp.br | 1 | Brazil | ntp.br | |
| gps.ntp.br | 1 | Brazil | ntp.br | |
| brazil.time.system76.com | 2 | Brazil | System76 | |
| time.bolha.one | 1 | Brazil | Cadu Silva | |
| paris.time.system76.com | 2 | France | System76 | |
| ntp3.fau.de | 1 | Germany | FAU | |
| ntp3.ipv6.fau.de | 1 | Germany | FAU | IPv6 only |
| ptbtime1.ptb.de | 1 | Germany | PTB | |
| ptbtime2.ptb.de | 1 | Germany | PTB | |
| ptbtime3.ptb.de | 1 | Germany | PTB | |
| www.jabber-germany.de | 2 | Germany | Jörg Morbitzer | |
| www.masters-of-cloud.de | 2 | Germany | Jörg Morbitzer | |
| ntppool1.time.nl | 1 | Netherlands | TimeNL | |
| ntppool2.time.nl | 1 | Netherlands | TimeNL | |
| ntpmon.dcs1.biz | 1 | Singapore | Sanjeev Gupta | |
| nts.netnod.se | 1 | Sweden | Netnod | Anycast |
| sth1.nts.netnod.se | 1 | Sweden | Netnod | For users close to Stockholm |
| sth1.nts.netnod.se | 1 | Sweden | Netnod | For users close to Stockholm |
| ntp.3eck.net | 2 | Switzerland | Adrian Zaugg | |
| ntp.trifence.ch | 2 | Switzerland | Marcel Waldvogel | |
| ntp.zeitgitter.net | 2 | Switzerland | Marcel Waldvogel | |
| time.signorini.ch | 1 | Switzerland | Attilio Signorini | |
| ohio.time.system76.com | 2 | US | System76 | |
| oregon.time.system76.com | 2 | US | System76 | |
| virginia.time.system76.com | 2 | US | System76 | |
| stratum1.time.cifelli.xyz | 1 | US | Mike Cifelli | |
| time.cifelli.xyz | 2 | US | Mike Cifelli | |
| time.txryan.com | 2 | US | Tanner Ryan |
Use this to verify connectivity (h/t @cadusilva)
chronyd -Q -t 3 'server NTP_SERVER_HERE iburst nts maxsamples 1'