DNS, WHOIS & ASN Intelligence
Analyze any domain's DNS, WHOIS, email security — or look up ASN, IP address, and network prefix details. Instantly and free.
Try: google.com · 8.8.8.8 · AS17644 · AS13335 · 103.14.23.0/24
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What we check
| Category | Description | |
|---|---|---|
| 📋 | Domain WHOIS | Registrar, creation/expiry dates, status flags and DNSSEC from RDAP/WHOIS. |
| 🌐 | DNS Records | A, AAAA, NS, MX, CNAME, SOA, TXT, CAA, SRV, DS and DNSKEY records. |
| 🔗 | Nameservers | TLD delegation, glue records, parent vs authoritative consistency. |
| 📧 | Email Security | SPF mechanisms, DMARC policy, CAA issue/issuewild/iodef. |
| 🔒 | DNSSEC | DS, DNSKEY, RRSIG detection and chain-of-trust validation. |
| 📡 | DNS Propagation | Resolution across 10 major public resolvers worldwide. |
| 🛰️ | ASN Intelligence | Organization, prefixes, peers, upstreams, downstreams, BGP, RPKI. |
| 📍 | IP Lookup | ASN, geolocation, network type, PTR, hosting/CDN/VPN detection. |
| 🗂️ | Prefix Analysis | CIDR block details, WHOIS, RPKI validation, BGP status. |
| 🔐 | SSL Checker | Certificate details, grade, protocol support, HSTS and expiry. |
| 🛡️ | Blacklist Check | Verify domains & IPs against major DNSBL/RBL spam blocklists. |
Free Online DNS, WHOIS & Network Intelligence Tools
Tools.BD is a free, all-in-one network diagnostics platform for DNS lookup, WHOIS lookup, ASN lookup, IP address lookup, and network prefix analysis. Whether you are a network engineer, domain administrator, or cybersecurity professional, our tools provide instant, detailed reports on any domain or IP address.
Domain Health Checker
Check your domain's DNS configuration, nameserver health, email security (SPF, DMARC, CAA), DNSSEC validation, and DNS propagation across 10 global resolvers. Our domain health checker identifies misconfigurations that can affect email deliverability, website availability, and security.
ASN & IP Intelligence
Look up any Autonomous System Number (ASN) to see its organization, country, announced IP prefixes, BGP peers, upstream and downstream providers, and RPKI validation status. Our IP lookup tool shows geolocation, network type, reverse DNS, open ports, and risk indicators like VPN, proxy, hosting, and CDN detection.
Network Prefix Analysis
Analyze any CIDR prefix to see its WHOIS registration, RPKI/ROA validation, BGP status, and IP address count. Perfect for network administrators managing IP allocations and BGP routing.
Who Uses Tools.BD?
- Network Engineers — Diagnose DNS issues, check BGP routing, verify RPKI deployment
- Domain Administrators — Monitor DNS health, check email security, verify DNSSEC
- Cybersecurity Teams — Investigate IP addresses, detect VPN/proxy/hosting, analyze network ownership
- Web Developers — Debug DNS propagation, check nameserver configuration, verify SSL/CAA records
- IT Support — Quick domain lookups, email delivery troubleshooting, network diagnostics
How it works
- Enter a query — type any domain, IP address, ASN, or CIDR prefix in the search box above.
- Live analysis — our Go backend queries DNS servers, RDAP/WHOIS, RIPE Stat, PeeringDB, RPKI and performs dozens of checks in real-time.
- Get results — see a detailed report with all data organized in clear sections.
Frequently Asked Questions
Is Tools.BD free to use?
Yes — every tool on Tools.BD is completely free with no signup required. You can run unlimited DNS lookups, WHOIS checks, ASN lookups and domain health scans.
How do I check my domain's DNS records?
Type your domain (e.g. example.com) into the search box above and press Analyze. The report shows all A, AAAA, NS, MX, CNAME, SOA, TXT, CAA, SRV, DS and DNSKEY records along with a full health grade.
What is a domain health check?
A domain health check audits how well your domain's DNS is configured: nameserver consistency, SOA values, mail server (MX) setup, SPF/DMARC email security policies, DNSSEC validation and DNS propagation across major public resolvers.
How do I look up an ASN or IP address?
Enter an AS number (e.g. AS13335), an IP address (e.g. 8.8.8.8), or a CIDR prefix (e.g. 103.14.23.0/24). You get organization details, announced prefixes, BGP peers, RPKI validation status, geolocation and network risk indicators.
Why is my email going to spam?
Common causes are missing or misconfigured SPF and DMARC records, missing PTR (reverse DNS) records on your mail server, or MX records pointing to the wrong host. Run a scan on your domain to see exactly which email security checks fail.
Do you store my searches?
Scan results may be cached briefly for performance. Use the "Private scan" toggle before searching if you don't want the query to appear in recent scans.