DNSTools

DNS, Domain & IP Toolkit
fast, free, no install needed

Check DNS records, WHOIS, SSL certificates, DNS propagation, HTTP headers, ports, blacklists, and IP location in seconds.

Shortcuts: WHOIS SSL IP Lookup Blacklist

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All Tools

DNS Lookup See all DNS records of a domain, complete and in real time. WHOIS Lookup Look up domain registration details or IP ownership using the modern RDAP protocol. DNS Propagation Checker Watch your DNS changes roll out across public resolvers around the world. SSL Certificate Checker Validate SSL/TLS certificates, view the issuer, validity, and covered domains. HTTP Header Checker Inspect HTTP response headers, status codes, and the redirect chain of a URL. Ping / Connectivity Test connectivity and measure latency to a host using TCP ping. Port Checker Check whether common service ports are open and reachable on a host. Blacklist / RBL Checker Check your IP or domain reputation across multiple spam blacklist databases (DNSBL/RBL). IP Geolocation Look up the geographic location, ISP, and ASN of an IP address or domain.

Recent Lookups

Port Checker 8.8.8.8 DNS Records google.com WHOIS seotools.my.id WHOIS dnstools.my.id IP Lookup 1.1.1.1 Port Checker google.com Blacklist 8.8.8.8 DNS Records nodeotp.com

Why DNSTools?

Fast & lightweight

Built with plain MVC PHP, smart caching, and parallel queries so results show up almost instantly.

Accurate & reliable

Combines native resolvers with DNS-over-HTTPS (Google, Cloudflare, Quad9) for consistent results.

Free & open

Every tool is free, complete with a JSON API you can integrate into your own apps.

Privacy friendly

No login required. We only keep query summaries for caching and statistics.

One place for all your DNS and domain diagnostics

Managing a domain looks trivial until something breaks. A website suddenly goes down, email stops arriving, or a security certificate expires at the worst possible time. When those moments hit, you need quick answers, not a heavy app to install or ten different sites to open. That is exactly why DNSTools exists: to bring the tools web practitioners reach for most into one lightweight, fast page.

From first-time domain owners to server administrators

Whether you just bought your first domain or have managed production servers for years, the tools here are relevant. Online store owners can make sure their SSL certificate is healthy before the shopping season. Email admins can check whether their IP is clean of blacklists. Developers can verify DNS propagation after a deployment. All of it free and without registration.

How it works, transparently

We hide nothing behind the scenes. DNS lookup combines the server native resolver with DNS-over-HTTPS from trusted providers so results stay accurate from any network. WHOIS uses the modern RDAP protocol. SSL checks read straight from a real connection to the server. What you see is the actual state right now, not a guess or stale data.

Built to feel instant

Speed is not just a bonus, it is the core of a good experience. Each result is cached briefly so repeated checks feel instant, queries to multiple sources run in parallel, and the page itself is kept as light as possible. You should not have to wait long just to learn a single A record.

Frequently Asked Questions

Are all the tools here really free?

Yes, everything is free with no login required. You do not need to sign up or enter any card. We only apply a reasonable request limit to prevent abuse.

Is the data I check stored?

We only keep minimal query summaries for caching and usage statistics. There is no user profile and no personal tracking.

Can I use it on mobile?

Yes. The layout adapts to your screen, so it is comfortable on both phone and desktop for quick checks.

Is there an API for integration?

Yes. Every tool has a JSON API endpoint you can call from your own apps. The full list is available on the API page.