Fat Zebra incident
91 - Host or Switch Unavailable errors affecting Westpac merchants
Critical Vendor's status page →
Resolved after 2 hours 32 minutes, affecting Gateway: Westpac & Bank of Melbourne, on December 10, 2025.
Transactions for Westpac merchants are now processing successfully. We will continue to monitor during the afternoon for any further problems.
Affected components
Gateway: Westpac & Bank of Melbourne
Update timeline
- investigating Dec 10, 2025, 02:37 AM UTC
We are currently investigating a problem with Westpac merchants receiving '91 - Host or Switch Unavailable' responses for all transactions.
- monitoring Dec 10, 2025, 02:59 AM UTC
Transactions for Westpac merchants are now processing successfully. We will continue to monitor during the afternoon for any further problems.
- resolved Dec 10, 2025, 05:10 AM UTC
This incident has been resolved.
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