With Domain Digger I had a couple of goals: 1. A snappy user experience 2. Have all possible tools in one place and be able to quickly jump between them 3. And of course have it all open-source: https://github.com/wotschofsky/domain-digger
Features include: * DNS Lookup from selectable location
* WHOIS lookup
* Certificate history
* IP Details
* A quick access bookmarklet (does anyone even remember those?)
The app is built using Next.js on Vercel and shadcn/ui.
Here are a couple of fun or shocking findings I gathered over the years:
* GitHub uses a mixture of own IP addresses and Azure IPs depending on the region: https://digger.tools/lookup/github.com/map
* Cloudflare uses different IP addresses in Europe, despite using an anycast setup: https://digger.tools/lookup/wsky.dev/map
* The majority of startups use Google Workspace - Microsoft 365 is the exception
* DNSSEC adoption is ridiculously low - even Google doesn't use it: https://digger.tools/lookup/google.com
* Too often, companies opt not to support IPv6, even though it is easily supported by their CDN: https://digger.tools/lookup/www.deviantart.com (compare to https://digger.tools/lookup/d2ade2shja8hmk.cloudfront.net)