The problem, which started on Monday morning, appears to be related to an issue at Amazon Web Services (AWS).
As of 9.20am (UK time), there were more than 2,000 reports of the Amazon Web Services outage in the US alone, according to Downdetector, which monitors issues and outages in real-time.
Follow live updates here
By 11am, AWS said it had observed recovery across most of the affected sites, and it was working towards a full resolution.
Here's what we know so far.
What has been affected?
Multiple banks, the UK's Government Gateway services - which is accessed through the Gov.uk website and includes things like HMRC, universal credit and pensions - mobile phone networks and video-chatting platform Zoom are among the websites reportedly having technical issues.
A UK government spokesperson said: "We are aware of an incident affecting Amazon Web Services, and several online services which rely on their infrastructure.
"Through our established incident response arrangements, we are in contact with the company, who are working to restore services as quickly as possible."
A Lloyds Bank spokesperson also apologised for issues affecting customers, adding: "We are seeing services coming back online and continue to work to see that happens as quickly as possible."
All Amazon products - including Prime Video, Alexa and Amazon Music - have also been affected, as well as the main Amazon website.
According to Downdetector, nearly 50 outlets have been affected. Here's a full list:
• Amazon
• Amazon Alexa
• Amazon Music
• Amazon Prime Video
• Amazon Web Services
• Ancestry
• Asana
• Atlassian
• Bank Of Scotland
• Blink Security
• BT
• Canva
• Clash Of Clans
• Clash Royale
• Coinbase
• Dead By Daylight
• Duolingo
• EE
• Epic Games Store
• Eventbrite
• Flickr
• Fortnite
• Government Gateway services (including HMRC)
• Halifax
• Hargreaves Lansdown
• Hay Day
• Hinge
• HMRC
• IMDB
• Jira Software
• Just Eat
• Life360
• Lloyds Bank
• Microsoft 365
• My Fitness Pal
• Peloton
• Perplexity AI
• Playstation Network
• Pokemon Go
• Rainbow Six
• Reddit
• Ring
• Roblox
• Rocket League
• Signal
• Sky Mobile
• Slack
• Smartsheet
• Snapchat
• Strava
• Square
• Tidal
• WhatsApp
• Wordle
• Xero
• Zoom
how does AWS going down make 0365 go down? competitors
A lot of these companies use Amazon data services.
Microsoft has their own AWS - Azure.
I guarantee you Microsoft is not using Aws for anything
MS TEAMS is affected as it utilizes aws third party tools for security.
AWS might not have been the problem, just the hardest hit...
imagine if cloudfare fucked up their DNS for a couple of sites. if aws was one of them, that'd take out hundreds of websites
So sorry everyone. I just wanted to watch season 4 of MacGyver.
AWS down means many are getting paid to do nothing right now. We spent the last 20 years decentralizing everything and then during the chinamen's term we centralised all of it on aws. Kek. But sad.
Big Blue cities is mostly what has been affected in the U.S. New York, Boston, Atlanta, St Louis, Los Angles and Seattle.
Our Internet service has been up and down all weekend, but we're on Comcast, so we didn't notice any difference
Doesn't the US Mil use the Amazon cloud?
When I worked for immigration years ago, they did. Not sure if they still do.
Substack is down, but I’m using the app which is horrendous.
I think Western Union
Don't forget - CIA uses Amazon servers for some of their operations. Is there a delta about blinding the CIA for a time?