Some of Australia’s biggest banks and service providers appear to be suffering a significant outage on Thursday afternoon, with ANZ, CommBank and Westpac all down.
St George, Bank of Melbourne and Bank SA are also reporting difficulties, as are Australia Post, Telstra and the NBN.
Virgin Australia has also reported problems, however the fourth big bank, NAB, appears unaffected.
The outage was first reported around 2:10pm AEST, according to outage monitor DownDetector.
Customers have reported difficulties logging onto their banking apps, while others have flagged issues paying with tap and go and using ATMs.
“We’re aware some of you are experiencing difficulties accessing our services and we’re urgently investigating,” CommBank said on Twitter.
“We apologise and thanks for your patience, we’ll provide an update soon.”
ANZ also acknowledged the outage, saying it was experiencing issues with its ANZ App and internet banking, while Westpac issued a similar statement.
Virgin Australia said it was suffering a "system outage" on its website and guest contact centre.
"We apologise for any inconvenience," it said on Twitter.
The outage is believed to be an issue with a third-party distributed-denial-of-service (DDoS) service provided by Akamai.
Akamai runs a major content delivery network, which is a platform that essentially allows companies to connect information across several locations.
The mass crash comes days after websites including Spotify, Amazon and the entire UK government website were sent down after one user updated their settings.
Services begin to resume
CommBank reported some of its services were beginning to come back online at around 4:15pm AEST.
"Thank you for your patience - we're sorry to cause any inconvenience to your afternoon," the bank said.
At 5:19pm AEST Virgin Australia said its systems were back up and running and its website and guest contact centres were operating as usual.
"Flights are largely operating as scheduled and we apologise to any guest who has been inconvenienced," Virgin Australia said in a statement.
"Virgin Australia was one of many organisations to experience an outage with the Akamai content delivery system today and we are working with them to ensure that necessary measures are taken to prevent these outages from reoccurring."