Cloudflare reports that things have returned to normal. We have restored use of Cloudflare for DOI resolution at doi.org.
IPv6 access to doi.org should resume for any impacted IPv6 users as soon as DNS propagation and cache expiration is complete.
Posted Nov 18, 2025 - 17:23 UTC
Update
Cloudflare reports that their incident is resolved. We will continue to bypass Cloudflare for the moment while they monitor their fix. We note though, as an unfortunate limitation of bypass, that IPv6 access to doi.org is currently not working.
Posted Nov 18, 2025 - 14:47 UTC
Update
We are continuing to investigate this issue.
Posted Nov 18, 2025 - 13:23 UTC
Update
We have bypassed Cloudflare as a presumably temporary measure. Users may not see the effect of this immediately depending on DNS propagation and caching, but if Cloudflare's incident continues, this should help to allow more DOI resolution.
Posted Nov 18, 2025 - 13:22 UTC
Investigating
Cloudflare is experiencing a global network issue which is affecting many internet services, including DOI resolutions on doi.org. Services should return to normal once the issue at Cloudflare is resolved. For more information and updates on the Cloudflare outage, see https://www.cloudflarestatus.com/incidents/8gmgl950y3h7
Posted Nov 18, 2025 - 12:55 UTC
This incident affected: DOI Resolution Service and DOI Website.