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The Top 10 Largest Global Internet Service Outages for H1 2023

Tuesday, Aug 29th, 2023 (8:14 am) - Score 1,280
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Internet benchmarking firm Ookla, which operates the popular broadband ISP performance testing service Speedtest.net and the real-time outage monitoring Downdetector service, has used data gathered from the latter to reveal which online services suffered the largest outages during the first half of 2023. Instagram tops the table.

Downdetector typically identifies and monitors when various popular online websites and mobile or broadband ISPs are suffering from network problems, which it achieves by gathering feedback from end-users, both collected via their own website and the Speedtest.net App.

NOTE: Only a small portion of users will ‘report’ their outages to services like Downdetector, thus the actual impact is often significantly larger than the data shown below may suggest.

Admittedly, we would have preferred to see a list filtered by outages on UK broadband ISPs and mobile operators, but perhaps they’ll get around to that in the future. In the meantime, Ookla has put together a top 10 table of the largest global outages to hit online services during the first half of 2023.

Straight in at the top of the table is the Facebook owned image sharing social media service Instagram, which suffered the largest single outage so far on 21st May 2023 and one that lasted around 4 hours. Over 2.4 million users worldwide reported issues with the popular service, which put it way above Reddit (1.2 million users) in second place.

The Ten Largest Online Service Outages for H1 2023

1. Instagram, May 21, 2023

User Reports: 2.4 million
Time Window (UTC): 10pm to 2am

2. Reddit, March 14, 2023

User Reports: 1.2 million
Time Window (UTC): 7pm to 1am

3. Spotify – January 14, 2023

User Reports: 489,000
Time Window (UTC): 6pm to 8pm

4. Roblox – January 28, 2023

User Reports: 470,000
Time Window (UTC): “Saturday night”

5. Diablo – June 8, 2023

User Reports: 338,000
Time Window (UTC): 8pm to 12am

6. Steam – June 25, 2023

User Reports: 308,000
Time Window (UTC): 11pm

7. YouTube – February 9, 2023

User Reports: 300,000
Time Window (UTC): ?

8. EA – May 4, 2023

User Reports: 298,000
Time Window (UTC): 9am to 6pm

9. Microsoft 365 – January 25, 2023

User Reports: 240,000
Time Window (UTC): 7am to 7pm

10. League of Legends – May 13, 2023

User Reports: 200,000
Time Window (UTC): “throughout the day”

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By Mark Jackson
Mark is a professional technology writer, IT consultant and computer engineer from Dorset (England), he also founded ISPreview in 1999 and enjoys analysing the latest telecoms and broadband developments. Find me on X (Twitter), Mastodon, Facebook and .
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