Codynet

A free network toolbox for DNS, RDAP, HTTP, TLS, and subnet investigations, providing deterministic answers directly from the protocols. It serves developers, IT, and operations teams who need quick, trustworthy network diagnostics without accounts or paywalls. The tool is positioned as a direct, no-middleman alternative to proprietary APIs, with transparent privacy limits and no vendor lock-in.

Key features

• DNS Lookup for common record types
• DIG Lookup with raw output
• NSLookup for A, AAAA, CNAME, NS
• MX Lookup for mail exchangers
• TXT Lookup for SPF, DKIM, verification
• Reverse DNS (PTR) lookup
• Multi-resolver comparison
• Bulk lookups with JSON/CSV export
• TLS certificate inspection
• HTTP security headers audit
• Subnet math tools
• RDAP domain registration data lookup