Time services

Precise UTC time for computer clock synchronization.

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Basic features

This service offers precise UTC time for computer clock synchronization.

CESNET’s Stratum-1 NTP servers are synchronized with a rubidium clock, using optical links and GPS for UTC scale reference.

Precise time
  • Our NTP servers provide microsecond accuracy with a caesium clock linked to UTC.
  • The service is available in open mode (non-authenticated) or with authentication using a server key.

The service supports members and entities with or without NTP servers and is currently open for use.

The service is available to the public free of charge.

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