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Topic subscriptions

Topic subscriptions offer safety-relevant information on a range of topics. Depending on the topic, they either run continuously or expire after the event. You can also (de)activate or delete these subs from the KATWARN app menu at any time.

Active topic subscriptions

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Messe Berlin


Safety/security-relevant information for events held at Messe Berlin – including e.g. service disruptions, very large crowds or blocked entrances/exits.

Messe Berlin has sole responsibility for such warnings.

Warning areas:

Messe Berlin trade show buildings and grounds.


(Use your smartphone to scan the matching QR code and then activate the event-based subscription.)

Subscribe now!