About nslookup.net

nslookup.net is a free, professional platform offering 80+ tools for DNS lookups, SSL certificate inspection, email authentication analysis, domain intelligence, web security auditing, and SEO diagnostics — all without requiring registration or storing personal data.

What we offer

Our tools are organized into six categories: DNS & Propagation, SSL & HTTPS, Email Security, Domain Intelligence, Web Security & SEO, and Generators. Every tool runs passive, read-only queries against public internet infrastructure — we never execute arbitrary commands on your behalf or probe internal network resources.

Privacy by design

We do not require you to create an account. Query inputs are hashed with SHA-256 before storage so raw domain names and IP addresses are never persisted in plain text. No cookies are set beyond the session cookie required for CSRF protection, and we do not display third-party advertisements.

DNS resolution

All DNS queries use DNS over HTTPS (DoH) through Google Public DNS, Cloudflare 1.1.1.1, and Quad9 with priority-based fallback. Our Propagation Checker fans queries out to all three providers simultaneously so you can see real-world DNS propagation status at a glance.

Contact

For feedback, bug reports, or abuse concerns, please use the contact form.