NTP Servers in New Zealand

Have a look at http://www.cosc.canterbury.ac.nz/research/reports/TechReps/1999/tr_9901.pdf for a scientific study (from 1999) of the topology of the country's main NTP servers. (A bit dated as GPS is much more widely available now).

Stratum 2 Servers

There is a pool of servers at nz.pool.ntp.org, which provides Round Robin DNS access to publicly accessible NTP servers that have agreed to be part of the pool.

Many ISPs have NTP servers for their customers:

• ntp.iprolink.co.nz
• ntp.iconz.co.nz
• tk1.ihug.co.nz to tk3.ihug.co.nz
• time.paradise.net.nz

Some universities have publicly accessible servers:

• ntp.public.otago.ac.nz (Please notify before using)
• ntp.massey.ac.nz (Use the DNS name, as its IP changed recently and is now hosted by two machines)

For a long time Waikato University had public NTP servers. They are still available but no longer publicly accessible.

Stratum 1 Servers

You shouldn't synchronise to a stratum one server for your small network -- if everyone did that then the server would probably need too much bandwidth. The difference in accuracy between synching to a stratum 1 server and a lower stratum server is negligible! more

.nz Registry Services

There are three stratum 1 NTP servers provided by .nz Registry Services (NZRS) for network operators based within New Zealand. more

• s1.ntp.net.nz is in Albany connected via FX.
• s2.ntp.net.nz is in Auckland CBD connected via ICONZ and directly into APE.
• s3.ntp.net.nz is in Wellington CBD connected via FX and directly into WIX.

All three are Symmetricom S300 NTP servers, each connected to a differential GPS antenna on the roof and each with a rubidium oscillator to provide a stable clock in the event of an issue with the GPS signal. more

The Measurements Standards Laboratory

The standard for time in New Zealand is maintained by the Measurement Standards Laboratory, part of Industrial Research Limited. It is disseminated by various means, including 'pips' on several radio stations and NTP.

• msltime.irl.cri.nz
• msltime1.irl.cri.nz
• msltime2.irl.cri.nz

They are FreeBSD-based servers that are referenced to UTC(MSL) by direct connection to a pulse per second signal from their master HP5071A caesium clock which is part of the New Zealand time standard. more

Servers in other countries

pool.ntp.org has NTP server pools for many countries.

• au.pool.ntp.org Australia
• us.pool.ntp.org United States

Stratum 1 Servers in the United States

The US National Institute of Standards and Technology (NIST) operates several publicly accessable stratum 1 time servers on the pacific coast of the US. These servers are referenced to UTC(NIST) using the NIST Automated Computer Time Service (ACTS), a modem-based service established in 1988. more

• nist1.symmetricom.com San Jose, California
• nist1-sj.ustiming.org San Jose, California
• nist1-la.ustiming.org Los Angeles, California
• nist1.aol-ca.symmetricom.com Mountain View, California

The US Naval Observatory (USNO) operates several stratum 1 time servers from it's Alternate Master Clock Facility (AMCF) at Falcon AFB, near Colorado Springs, on the same site as the GPS Master Control Station. These servers are referenced to a network of hydrogen maser and caesium standards that are synchronised with UTC(USNO) via satellite. more

• tick.usnogps.navy.mil
• tock.usnogps.navy.mil

Hurricane electric operates several stratum 1 servers with good connectivity on the pacific coast of the US. more

• clock.sjc.he.net San Jose, California (CDMA, Endrun Praecis CNTP)
• clock.fmt.he.net Fremont, California (GPS, Symmetricom NTS-150)

Stratum 1 Servers in Australia

The Australian National Measurement Institute (NMI) maintains the Australian time standard, UTC(AUS) using caesium and hydrogen maser standards. NMI maintains a number of NTP servers which are referenced to UTC(AUS). To use these servers, you need to register via email. more

See also NTPNotes