exact-time.eu

ptbtime3.ptb.de

PTB (Physikalisch-Technische Bundesanstalt), Braunschweig, Germany. National time institute.

Status now

Reachable

Stratum
1, reference PTB
Round trip
6.2 ms
Offset
-0.13 ms
Its own uncertainty
0.08 ms
Availability, 24 h
100%
NTS (secure NTP)
Yes

Measured from our server in Frankfurt, Germany, 28 Oct, 19:48 UTC.

Test this server now

Use this server

Add it together with at least three other servers from different operators.

chrony
server ptbtime3.ptb.de iburst nts
ntpd
server ptbtime3.ptb.de iburst
systemd-timesyncd
NTP=ptbtime3.ptb.de
Windows
w32tm /config /manualpeerlist:"ptbtime3.ptb.de,0x8" /syncfromflags:manual /update

Last 30 days

Loading the history from our measurement server…

Availability per day
Round trip from Frankfurt, Germany, ms
Offset from our reference clock, ms

Each point is one check every 15 minutes, the best of three quick measurements. Offsets of a few milliseconds usually come from differences between the outward and return network path, not from the server’s clock. New servers build up their history over the first days.

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