About — Domain Analyzer Tools

What is this?

Domain Analyzer Tools (tools.bd) is a free domain health diagnostic tool built by Mehedi Hasan.

Given a domain name, it performs a comprehensive, live analysis covering:

Domain Registration — Registrar, creation/expiry dates, status, DNSSEC via RDAP/WHOIS
DNS Records — A, AAAA, NS, MX, CNAME, SOA, TXT, CAA, SRV, DS, DNSKEY
Parent Nameservers — TLD delegation, glue records, parent vs authoritative consistency
Authoritative Nameservers — UDP/TCP reachability, authoritative flag, open recursion check, latency
SOA Analysis — MNAME, RNAME, serial format, refresh/retry/expire/minimum TTL sanity
Mail Servers (MX) — Validity, IP resolution, redundancy, reverse DNS/PTR
WWW / Web — A, AAAA, CNAME following with full chain analysis
DNSSEC — DS, DNSKEY, RRSIG detection and chain-of-trust validation
Email Security — SPF mechanism/lookup count, DMARC policy, CAA records
DNS Propagation — Resolution across 10 major public resolvers worldwide

The backend is written in Go and uses the miekg/dns library for all DNS operations — no shell commands or external tools like dig or nslookup.

RDAP/WHOIS lookups use IANA's bootstrap service to find the correct RDAP server for each TLD.

The frontend is plain PHP with no JavaScript frameworks. Results are fetched from the Go API and rendered server-side.

This project is not open source currently. The source code is proprietary and not publicly available for use, modification, or redistribution.

If you are interested in collaboration or have questions about the technology, please contact us.

Backend	Go
DNS Library	miekg/dns
Frontend	PHP (plain, no framework)
Database	PostgreSQL + Redis
Transport	JSON REST API + Server-Sent Events (SSE)
Reverse Proxy	Caddy (automatic TLS)
Author	Mehedi Hasan
Website	tools.bd