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Operating Hours

Computer systems and network components

  • Around the clock (24 hours, 7 days)
  • Maintenance times: after announcement in the current news e.g. on the WWW-homepage of the HRZ
  • Maintenance period usually Wednesday mornings


Fault hotline

Control panel Tel. 0228 / 73-3360

  • Monday to Friday: 7:00 - 21:00

Please note the special opening hours


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