DNS Checker vs 1Cert

DNS Checker: look up DNS, WHOIS, SSL, IP location, ports & propagation — all in one simple app. Built for developers, sysadmins, site owners, gamers, and anyone troubleshooting domains or servers. DNS LOOKUP • A, AAAA, MX, TXT, NS, SOA, SRV & CAA records • TTL, priority and full record details • Copy any value with one tap • Save lookups to History and reopen anytime WHOIS & DOMAIN • Registrar, creation & expiry dates • Name servers and DNSSEC status • Domain availability check SSL CERTIFICATE • Issuer, subject and validity dates • Days until expiry • Signature algorithm & serial number IP & NETWORK • IP geolocation (city, country, ISP, ASN) • Reverse DNS (IP → hostname) • HTTP response headers PORT CHECKER • Check if a remote port is open or closed • Scan common ports from the internet (fast batch scan) • Common ports: HTTP, HTTPS, SSH, SMTP, MySQL, RDP, Minecraft & more • Port History for past checks • Useful for port forwarding and firewall testing WATCH DOMAINS • Save domains you care about • Detect DNS A-record changes • Quick status: OK, SSL warning, or DNS changed SSL EXPIRY REMINDERS • See which certificates expire soon • Optional local reminders before expiry DNS PROPAGATION • Compare A records across Google, Cloudflare & Quad9 • Clear result: “All servers agree” or “Still updating” PRO • Ad-free experience (no banners or pop-ups) • Instant PDF export of full DNS reports (All core tools are available free. Free users can export PDF by watching a short ad.) Perfect for: • Checking DNS after a domain or hosting change • Verifying SSL before a site goes live • Testing port forwarding (game servers, remote access) • Watching important domains for unexpected DNS changes No account required. Fast, clean, and designed for iPhone & iPad. Questions? contacttomujahid@gmail.com Privacy Policy: https://justclack.blogspot.com/p/privacy-policy.html Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Subscriptions (optional): • Weekly, Monthly, or Yearly Premium • Payment charged to your Apple ID • Auto-renews unless cancelled at least 24 hours before the period ends • Manage or cancel in App Store account settings

1Cert is a secure credential verification and compliance platform for companies. Instantly verify credentials, manage site requirements, and share verified records with confidence.