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Network Tools
That Just Work
13 free tools for developers, sysadmins, and curious users. Live results, every time.
Find your public IP address instantly. See your IPv4, IPv6, location, ISP, and browser details — no signup required.
Look up domain registration details, owner, registrar, expiry date, and nameservers for any domain instantly.
Look up the owner, ISP, ASN, and geographic location of any IPv4 or IPv6 address instantly.
Look up DNS records for any domain: A, AAAA, MX, CNAME, TXT, NS, SOA, CAA and more. Instant, free.
Check any website's SSL certificate: expiry date, issuer, domain coverage, chain validity. Instant, free.
Inspect the HTTP response headers returned by any URL. Check cache-control, CORS, redirects, security headers, and more.
Check your domain's SPF, DKIM, and DMARC records. Diagnose email deliverability problems and spam filter failures instantly.
Check if an IP address appears on major spam blacklists including Spamhaus, SORBS, Barracuda, and SpamCop. Free, instant results.
Look up the PTR record for any IPv4 or IPv6 address. Find the hostname an IP resolves to and verify forward-confirmed DNS.
Calculate subnet details from any CIDR notation: network address, broadcast address, usable IP range, wildcard mask, and host count.
Check if a website is up or down right now. Tests from our server independently of your connection — instant, free.
Test your website's server response time, DNS lookup, TCP connect, TLS handshake, and time to first byte (TTFB) from our server.
Check DNS propagation worldwide. See how your DNS records appear across Google, Cloudflare, ControlD, AdGuard, dns0.eu and other global resolvers.
Free Network Tools — Instant, No Account Needed
AdminsDeck provides 13 fast, accurate network diagnostic tools. Every result is fetched live — no cached or stale data. Works on any device, no signup required.
DNS & Domain Tools
Run DNS lookups for any record type (A, AAAA, MX, TXT, CNAME, NS, SOA, CAA). Check domain WHOIS registration data, expiry dates, and nameservers. Verify DNS propagation across Google, Cloudflare, Quad9, and OpenDNS simultaneously.
Email Deliverability
Validate SPF, DKIM, and DMARC records to diagnose why emails land in spam. Check if an IP address appears on major spam blacklists (RBLs) including Spamhaus ZEN, Barracuda, SORBS, and SpamCop.
SSL & Security
Inspect SSL/TLS certificates — expiry, issuer, SANs, chain validity, and TLS protocol support. Audit HTTP security headers (HSTS, CSP, X-Frame-Options) and trace redirect chains.
IP & Network Tools
Find your public IP address. Look up IP WHOIS, owner, ASN, and geolocation for any IPv4 or IPv6. Run reverse DNS (PTR) lookups. Calculate subnet ranges, broadcast addresses, and host counts from any CIDR block.
Performance & Availability
Check if a website is up or down from our server. Measure DNS lookup time, TCP connect, TLS handshake, and time to first byte (TTFB) for any URL.