Surveillance website Downtector reported on Thursday that the websites of several multinational companies around the world are facing downtime.
They include the sites of major American airlines such as American Airlines, Southwest Airlines, United Airlines and Delta Airlines.
Major banks in Australia have also reported online downtime affecting their websites and applications.
It is not immediately clear whether the breakdowns in Australia and the United States are linked.
The companies said they were urgently investigating the matter.
What is the effect of the downturn on the Australian financial sector?
The Reserve Bank of Australia (RBA) has said it will cancel its move to buy long-term government securities.
“Due to technical issues, today’s RBA long-dated open market activity auction has been canceled,” the bank said.
According to the DownDetector, the crash in Australia started at 2:10 pm local time (0510 GMT).
“We understand that some of our customers are currently having difficulty accessing our services,” Commonwealth Bank, the country’s largest financial institution, told AFP. “This issue affects many companies, including many large banks.”
The Commonwealth Bank later announced on Twitter that “services are beginning to return to normal”.
Another banking group, ANZ, said most “services seem to be running and running”.
sri / rt (AFP, Reuters)