$ curl https://dnsx.dev/myip
{
  "ip": "203.0.113.42",
  "hostname": "example.isp.net",
  "geo": {
    "country": "United States",
    "city": "San Francisco",
    "timezone": "America/Los_Angeles"
  },
  "asn": {
    "number": "AS12345",
    "name": "Example ISP"
  }
}

What is DNSX?

DNSX is a free suite of network diagnostic tools designed for developers, system administrators, and IT professionals. Whether you need to debug DNS propagation issues, verify SSL certificates, look up IP geolocation data, or check email authentication configuration, DNSX provides fast and reliable results through both a web interface and a REST API.

Unlike many online tools, DNSX is designed to work seamlessly from the command line. Every tool is accessible via simple curl commands, making it easy to integrate into scripts, CI/CD pipelines, and monitoring workflows. Responses are returned as structured JSON, ready for parsing and automation.

Available Tools

DNS Lookup queries records from multiple public DNS resolvers (Google, Cloudflare, Quad9, OpenDNS) and authoritative nameservers, supporting all major record types including A, AAAA, MX, TXT, CNAME, NS, SOA, SRV, NAPTR, and CAA. The Compare All mode highlights propagation inconsistencies, and MX/NAPTR lookups include full resolution chain visualizations with IP geolocation data.

IP Lookup provides geolocation, ASN (Autonomous System Number), organization details, RDAP registration data, and privacy detection (VPN, proxy, Tor, hosting) for any IPv4 or IPv6 address. Visit the tool without an IP to see your own address with dual-stack IPv4/IPv6 detection.

SSL Checker connects to any domain on port 443 and analyzes the SSL/TLS certificate, including validity, expiration dates, certificate chain, supported protocols (TLS 1.2/1.3), and Subject Alternative Names. Results include a security grade from A+ to F.

WHOIS Lookup retrieves domain registration data including registrar, registration and expiration dates, nameservers, and status codes. Raw WHOIS data is also available for detailed analysis.

Email Tools analyze email configuration by checking MX records with full server resolution, SPF record validation, and DMARC policy analysis with strength ratings and actionable recommendations.

Security Tools include a cryptographically secure password generator, Diceware passphrase generator, multi-algorithm hash generator (MD5, SHA-256, SHA-512, bcrypt), and an end-to-end encrypted one-time secret sharing service using AES-256-GCM.

Frequently Asked Questions

What tools does DNSX offer?▼

DNSX provides free DNS lookup (A, AAAA, MX, TXT, CNAME, NS, SOA, SRV, NAPTR, CAA records), IP geolocation and ASN lookup, SSL/TLS certificate verification, WHOIS domain registration lookup, email configuration analysis (MX, SPF, DMARC), and security tools including password generation, passphrase generation, hash generation, and encrypted one-time secret sharing.

Is DNSX free to use?▼

Yes, DNSX is completely free for all web-based lookups and API usage. There are no accounts required for basic lookups. You can also access all tools via the command line using curl (e.g., "curl https://dnsx.dev/myip").

Can I use the DNSX API from the command line?▼

Yes, all DNSX tools are accessible via curl. For example: "curl https://dnsx.dev/dns/google.com" for DNS lookups, "curl https://dnsx.dev/myip" for your IP, "curl https://dnsx.dev/ssl/github.com" for SSL checks, and "curl https://dnsx.dev/whois/example.com" for WHOIS data. Responses are returned as JSON.

How does DNSX compare DNS results from multiple resolvers?▼

DNSX queries DNS records from Google (8.8.8.8), Cloudflare (1.1.1.1), Quad9 (9.9.9.9), OpenDNS (208.67.222.222), and authoritative nameservers simultaneously. The Compare All feature shows results side-by-side and indicates whether all resolvers agree (consensus), helping identify DNS propagation issues.