Domain Checker: DNS & SSL

Domain Checker brings DNS, SSL/TLS, HTTPS, registration data, and email security checks into one local-first workspace for developers, sysadmins, and network engineers. LOCAL-FIRST ARCHITECTURE • 100% local capacity available: domains and checks stay on your device • Fast manual or automated refresh with offline backup and restore • Full access to standard diagnostics without cloud dependencies OPTIONAL CLOUD MONITORING • Automatic 24/7 background checks with instant outage and expiry alerts • Standard tier includes 50% cloud concurrency; PRO unlocks full 100% • Opt-in per domain anytime; zero automatic uploads CORE PROTOCOL DIAGNOSTICS • DNS: A, AAAA, CNAME, MX, TXT, NS, SOA, and CAA records • TLS: Certificates, full trust chains, expiration, SANs, and cipher suites • HTTPS: Status codes, redirect chains, latency, and reachability • WHOIS / RDAP: Registrars, status flags, and expiry timelines • Email Security: MX routing, SPF validation, and DMARC policies PRO ADVANCED SUITE (ONE-TIME PURCHASE) • Anycast DNS Propagation: Compare answers and TTLs across global public resolvers • DNSSEC Trust Chain: Verify DS, DNSKEY, and RRSIG signature validity • Lifecycle Planning: Sync expiration dates to Apple Calendar and Reminders • Security Hygiene: Detect dangling CNAME takeovers and wildcard DNS drifts • Full Cloud Concurrency: Maximize 100% cloud monitoring across all slots • Exportable PDF Reports: A4 diagnostic summaries and remediation priorities BUILT FOR iOS & iPadOS • Deep sapphire theme optimized for night-shift operations • Home Screen and Lock Screen widgets for at-a-glance fleet status • Localized in 9 languages Terms: https://domain.opshome.run/terms/ Privacy: https://domain.opshome.run/privacy/ EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/