A list of public NTP servers is maintained at http://ntp.isc.org/bin/view/Servers/WebHome. A list of stratum 1 and stratum 2 public NTP servers is maintained for public use under stated restrictions.
Each entry in the list details country code, state, host name, internet address, location and geographic coordinates, synchronisation source, access restrictions and maintainer.

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A complete solution for synchronising the time across computer networks.
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A Network timeserver using GPS signal to synchronise computer networks
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used alongside a Galleon timeserver to provide accurate time
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GPS clock providing time synchronisation for computer systems
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