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/