# Domains, registration & hosting tools

Understand a domain’s registration and public infrastructure.

Canonical: https://tamperbox.dev/categories/domains

Updated: 2026-10-29

Reviewed: 2026-10-26

Understand a domain’s registration and public infrastructure.

## Choose a check

Check availability and registry records, then investigate hosting networks, CDN and DNS providers, visible technologies and discovered names. Domain Health gives a broader starting assessment. Public evidence can be incomplete; registration and network ownership do not identify an individual visitor.

## Tools in this collection

- [SaaS & Email Services from DNS](https://tamperbox.dev/saas-stack): **See which services leave clues in a domain's public DNS records.**

  Identify service verification patterns in TXT records and mail senders named in SPF.
- [Website Hosting Checker](https://tamperbox.dev/website-hosting): **Taking over a website? Find the networks serving it.**

  Follow a domain to its addresses and name the network, ASN and country behind each.
- [CDN & Proxy Detector](https://tamperbox.dev/cdn-detector): **Find out whether a CDN or proxy sits in front of a website.**

  Is a site behind Cloudflare, Fastly, Akamai or CloudFront? Three signals decide.
- [DNS Provider Lookup](https://tamperbox.dev/dns-provider): **Need to change DNS? Find out which provider runs it.**

  Name who runs DNS for a domain from its NS records, and compare nameserver providers.
- [Website Technology Detector](https://tamperbox.dev/website-technology): **Curious what a website is built with? Look for clues in its pages.**

  Detect the CMS, frameworks and analytics of a site, with the line that gives each away.
- [Subdomain Finder](https://tamperbox.dev/subdomain-finder): **Find forgotten or unexpected hostnames in public certificate records.**

  List subdomains from Certificate Transparency logs, and flag the ones that look internal.
- [Domain Availability Checker](https://tamperbox.dev/domain-availability): **Got a name for your next project? Check whether the domain is available.**

  Check if a domain is free; for a registered one, its age, expiry and status codes.
- [WHOIS & RDAP Lookup](https://tamperbox.dev/whois-lookup): **Find where a domain is registered and when its registration expires.**

  Read a domain’s registrar, dates, locks, nameservers and DNSSEC from the registry.
- [Domain Health Checker](https://tamperbox.dev/domain-health): **Taking over a domain? Get a starting list of things to check and fix.**

  DNS, email authentication, HTTPS and security headers in one report, each with a fix.

## Continue exploring

[API & HTTP tools](https://tamperbox.dev/categories/api) · [Email authentication tools](https://tamperbox.dev/categories/email) · [DNS tools](https://tamperbox.dev/categories/dns) · [Network & IP tools](https://tamperbox.dev/categories/network) · [Crawl, SEO & site checks](https://tamperbox.dev/categories/web) · [Web security & TLS tools](https://tamperbox.dev/categories/security) · [Data format tools](https://tamperbox.dev/categories/data) · [Text & test data tools](https://tamperbox.dev/categories/text-testdata) · [Localization tools](https://tamperbox.dev/categories/localization) · [UI testing tools](https://tamperbox.dev/categories/ui-testing)