# Blog

> Notes on DNS, WHOIS and the infrastructure behind DigStory.

- [Who else is on that server? Reverse lookups by IP, CNAME, NS and MX](https://digstory.io/blog/reverse-lookups.md) (9 November 2026): Turn one IP address, CNAME target, name server or mail server into the full list of hostnames behind it, on the web, as CSV or through the API.
- [What changed on this domain? Reading a DigStory history](https://digstory.io/blog/what-changed-on-a-domain.md) (9 November 2026): A walkthrough of a domain's page in DigStory: current records, the DNS and WHOIS timeline, and how to use it when a site breaks, moves or changes hands.
- [Watch domains and get every change as a webhook](https://digstory.io/blog/watching-and-webhooks.md) (9 November 2026): Watch domains, receive their DNS, WHOIS, availability and technology changes as signed webhook deliveries, and verify the signature in a few lines.
- [Find every site that runs on a technology](https://digstory.io/blog/find-sites-by-technology.md) (9 November 2026): Use DigStory's technology pages to list the domains on a CDN, email provider, hosting network or SaaS platform, see who adopted or left it, and export the list.
- [Expiring, lapsing, dropped: following domains through their life cycle](https://digstory.io/blog/whois-expiring-and-dropped.md) (9 November 2026): How DigStory's WHOIS lists show domains close to expiry, in redemption, about to be released and newly registered, and how to filter them by TLD and registrar.
- [Getting started with the DigStory API](https://digstory.io/blog/api-getting-started.md) (9 November 2026): Create an API key, make your first request, page through large results and stay inside your daily quota, with the endpoints you will use most.