Another internet infrastructure outage has taken down a range of websites, including most major Australian airports and the site most commonly used to track outages.

Content delivery network and security services provider Cloudflare said its global network was “experiencing issues” just before 11.50am GMT (10.50pm AEDT).

The $US70 billion ($107.7 billion) company boasts that about 20 per cent of the web runs through its network and it has millions of customers, including 35 per cent of the Fortune 500.

Content delivery network and security services provider Cloudflare said its global network was “experiencing issues”. (Screenshot)

“Cloudflare is aware of, and investigating an issue which impacts multiple customers: Widespread 500 errors, Cloudflare Dashboard and API also failing,” it said.

“We are working to understand the full impact and mitigate this problem. More updates to follow shortly.”

About 11.20pm, the company said services were recovering but customers might keep seeing “higher-than-normal error rates”.

APIs are used to connect between different platforms, sites or services, 500 errors are generic errors usually linked to web servers and companies use the dashboard to manage their Cloudflare services.

Affected sites included X, Melbourne, Brisbane, Perth and Adelaide airports, and Downdetector, which uses Cloudflare to verify users aren’t bots before letting them access the site.

When Downdetector returned to functionality it also showed spikes in outage complaints from users of Amazon Web Services, film site Letterboxd, dating app Grindr and music streamer Spotify.

Instagram, Facebook, TikTok and Google services appeared to be working normally.