I found out that Amazon uses Cisco, Apple, and Uber (kind of). Here is how I did it.

For anyone who has there own custom domain, you know the value of DNS records. They allow you to validate your domain with other various sites, such as Vercel and Stripe.

Tiago Rangel and I created txted that allows you to see the DNS records of any website. It shows some interesting things. For example:

• https://dns.google/ has a TXT DNS Record leading to an XKCD comic.
• Amazon has a ton of results.

Try it for yourself and see what happens :)