Google has made available a set of public NTP servers. They can be found at the following hostnames and IP addresses:
Hostname |
IP Address |
time.google.com |
216.239.35.0 |
time2.google.com |
216.239.35.4 |
time3.google.com |
216.239.35.8 |
time4.google.com |
216.239.35.12 |