# dnsrecon.io

> Free DNS reconnaissance and analysis platform with lookup, propagation checking, speed testing, reverse DNS, email authentication validation, DNSSEC checking, blacklist monitoring, and MX diagnostics.

## Tools

- [DNS Lookup](https://dnsrecon.io/): Query all DNS record types with network topology visualization, geographic mapping, and exportable results.
- [DNS Propagation Checker](https://dnsrecon.io/propagation.html): Monitor DNS propagation across 30+ global resolvers in real-time.
- [DNS Speed Test](https://dnsrecon.io/speed.html): Compare resolver performance across Cloudflare, Google, Quad9, OpenDNS and others.
- [Reverse DNS Lookup](https://dnsrecon.io/reverse.html): IP to hostname resolution with PTR record verification.
- [SPF DKIM DMARC Checker](https://dnsrecon.io/mail.html): Validate email authentication records for any domain.
- [Blacklist Checker](https://dnsrecon.io/blacklist.html): Check IPs and domains against DNS blacklists including Spamhaus, Barracuda, SpamCop.
- [DNSSEC Validator](https://dnsrecon.io/dnssec.html): Validate DNSSEC chain of trust, DS records, and DNSKEY configuration.
- [MX Diagnostics](https://dnsrecon.io/mx.html): Mail server diagnostics with MX, SPF, DKIM, DMARC analysis and security scoring.

## Docs

- [API Reference](https://dnsrecon.io/docs/api): REST API documentation for programmatic DNS queries.
- [How to Read DNS Records](https://dnsrecon.io/guides/how-to-read-dns-records.html): Guide to interpreting A, AAAA, MX, NS, TXT, CNAME, SOA, and CAA records.
- [FAQ](https://dnsrecon.io/faq.html): Common questions about DNS lookup, propagation, email authentication, and troubleshooting.

## Optional

- All tools provide JSON API endpoints at /api/[tool-name]
- Results can be exported as JSON, CSV, or XLSX
- Network topology visualizations use Sigma.js with WebGL rendering
- Geographic data displayed on MapLibre GL maps with dark tiles