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Comment by ralph | Hacker News Reader

So a VM on G's Compute Engine could in turn run an NTP server that exported G's Production Time? Do I also see GPT on App Engine?

Any chance Google could just make a GPT NTP server available as a public service anyway, just as 8.8.8.8 is their public ping responder. ;-)

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8.8.8.8 and 8.8.4.4 are Google Public DNS, not a "ping responder." https://developers.google.com/speed/public-dns/

Google does provide time servers, although I'm not sure whether they are officially supported. The addresses are:

    time1.google.com
    time2.google.com
    time3.google.com
    time4.google.com

Yeah, sorry, I know they're the public DNS, but they're also jolly handy as unforgettable IP addresses you expect to be able to ping, hence the smiley.

Good news about the time{1..4} NTP servers, I'll give them a try, thanks.

I don't know about GAE specifically but I'd be very surprised if it didn't see the same time as the rest of Google. They would have had to do work to make that happen.

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