DNS & Domain Tools

Check if DNS changes have propagated by querying multiple global nameservers (Cloudflare, Google, Quad9). Shows propagation status across regions with live results and colour-coded status indicators - free online DNS propagation checker.

Check the age of any domain in years, months, weeks, and days. Enter a domain name to get its creation date, registration timeline, registrar info, and SEO authority estimate based on domain age - all fetched from the official RDAP registry in real time. Free online domain age checker.

Check domain registration information for up to 20 domains at once using the RDAP protocol. View registrar, creation date, expiry date, nameservers, and domain status codes in a sortable table - free online bulk WHOIS lookup.

Check when any domain expires - enter a domain name to see its expiration date, days remaining, registrar lock status, auto-renew status, and complete WHOIS details. Colour-coded health indicators show whether renewal is urgent. Free online domain expiry checker.

Generate available domain name ideas from keywords with real-time RDAP availability checks. Shows domain ideas across .com, .io, .dev, .app, .net, .org, and 9 other popular TLDs with colour-coded status badges - free online domain suggestion generator.

Check MTA-STS (SMTP MTA Strict Transport Security) records for any domain. Validates the DNS TXT record at _mta-sts.<domain> and fetches the policy file from https://mta-sts.<domain>/.well-known/mta-sts.txt. Shows mode (enforce/testing/none), MX patterns, max_age, and overall security status - free online MTA-STS checker.

Browse and search a comprehensive list of top-level domains (TLDs) including generic gTLDs (.com, .org, .net, .app, .dev), country-code ccTLDs (.uk, .de, .jp, .io, .tv), sponsored sTLDs (.gov, .edu, .mil), infrastructure (.arpa), and reserved TLDs. Each entry includes registry operator, introduction year, registration restrictions, and DNSSEC status. Filter by TLD type, search by name or TLD suffix, and copy any TLD with one click. Free online TLD list reference.

Check if a domain or IP address is listed on 9 major DNS-based blacklists (Spamhaus ZEN, Barracuda, SORBS, SpamCop, UCEPROTECT, NJABL, JustSpam, IX.DNSBL, AHBL) via DNS-over-HTTPS. Instant results with detailed return code explanations and delisting guidance - free online DNS blacklist checker.

Look up DKIM (DomainKeys Identified Mail) records for any domain and selector via DNS-over-HTTPS. Parses all DKIM tags (v, p, k, s, t, h, and more), validates the public key format, and shows key type, key length, and cryptographic strength. 10 preset selectors including Google Workspace, Microsoft 365, Zoho, and ProtonMail - free online DKIM record checker.

Check domain name length compliance for DNS. Enter any domain to validate each label (max 63 characters) and the full FQDN (max 253 characters) against RFC 1035 limits with real-time per-label analysis, colour-coded progress bars, and comprehensive error detection - free online DNS name compression checker.

Look up Mail Exchange (MX) records for any domain via DNS-over-HTTPS. Shows priority values, mail server hostnames, and automatically resolves IP addresses for each MX server with DNSSEC validation status - free online MX Record lookup.