IP addresses that diagrams.net and draw.io may be served from

[davidjgraph]

The diagrams.net domain serves app.diagrams.net and the MS Teams integration.

draw.io serves the Confluence and Jira integrations.

Both are served, the vast majority of the time, via Cloudflare. Their address ranges are found at https://www.cloudflare.com/en-gb/ips/.

In the event of a disaster at Cloudflare or disaster testing that simulates a Cloudflare outage, one or both domains might serve from AWS cloudfront, or Google Cloud CDN for an unknown period.

The AWS cloudfront address ranges are linked within https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/LocationsOfEdgeServers.html.

The Google Cloud address ranges are available at https://www.gstatic.com/ipranges/cloud.json.