Robtex - Network Intelligence Tools


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robtex.com provides comprehensive DNS, IP, and network analysis tools. Explore the relationships between domains, IP addresses, and autonomous systems with passive DNS data going back years.

Available Tools

IP Lookup

Get detailed information about any IP address: geolocation, network ownership, ASN, reverse DNS records, and related infrastructure. See all domains hosted on an IP and trace network relationships.

Domain Lookup

Analyze a domain's complete DNS configuration. See all record types, nameservers, mail servers, and hosting relationships. Track historical DNS changes over time.

AS Number Lookup

Query Autonomous System information including announced prefixes, network relationships, and routing data. Essential for understanding internet topology and peering relationships.

MAC Address Lookup

Identify the manufacturer of any network device by its MAC address. Query the IEEE OUI database to find vendor names, registry assignments, and organization details.

Reverse DNS

Find all hostnames pointing to an IP address. Discover shared hosting relationships, identify associated domains, and map infrastructure connections.

WHOIS

Look up domain registration data including registrar, creation date, expiration, and registrant information. Verify domain ownership and check registration history.

The Robtex Difference

Relationship mapping - We don't just show DNS records. We map the connections between domains, IPs, nameservers, and networks to reveal infrastructure patterns invisible in simple lookups.

Passive DNS history - Our database of observed DNS resolutions goes back to 2009, with coverage varying by domain. Every domain lookup includes a visual timeline showing when each record appeared, disappeared, and reappeared — with drill-down to individual observation timestamps. Track nameserver migrations, IP changes, and infrastructure evolution over 15 years of data.

Historic reverse lookups - See not just which domains currently use a nameserver, mail server, or IP — but which domains previously did. "Previously NS for", "Previously MX for", and "Previously A record for" sections reveal past infrastructure relationships invisible elsewhere.

Cross-referenced data - Query an IP and see all domains. Query a domain and see all IPs. Follow the links to understand the full picture.

Common Use Cases

Security Investigation

  • Trace suspicious domains to their hosting infrastructure
  • Identify related domains sharing the same IP or nameserver
  • Research threat actors through infrastructure patterns
  • Check domain age and registration history

Network Administration

  • Audit your own DNS configuration
  • Verify reverse DNS is properly configured
  • Find abuse contacts for network operators
  • Monitor for unauthorized DNS changes

Competitive Research

  • Discover what hosting providers competitors use
  • Identify CDN and security service configurations
  • Map web infrastructure through DNS analysis

Try It Now

Enter any domain or IP in the search box above, or explore these examples:

  • 8.8.8.8 - Google's public DNS server
  • 1.1.1.1 - Cloudflare's DNS resolver
  • AS13335 - Cloudflare's autonomous system
  • AS15169 - Google's autonomous system

Robtex is the flagship of our network intelligence suite:

  • DNS Ninja - Quick, focused DNS lookups
  • RBLS - IP reputation and blocklist checking
  • RTSAK - BGP routing analysis
  • HashXP - Bitcoin and Lightning Network explorer

FAQ

What is the difference between Robtex and a simple WHOIS lookup?
WHOIS shows registration data for a single domain. Robtex maps relationships across DNS, IPs, and networks — revealing how domains, nameservers, and hosting infrastructure connect to expose patterns a WHOIS query cannot.
Which Robtex tool should I start with?
Use Domain Lookup to analyze a domain's full DNS configuration, or IP Lookup to explore what's hosted on an address. For routing analysis, start with AS Number Lookup. For device identification, try MAC Address Lookup.
Is there an API for programmatic access?
Yes. Robtex provides an MCP (Model Context Protocol) server for AI agents and a REST API for direct integration. Data from all tools is accessible programmatically.
Does Robtex store historical DNS data?
Yes. Our passive DNS database captures observed resolutions going back to 2009 (coverage varies by domain). Every domain lookup includes a visual timeline for each record — showing first seen, last seen, observation count, and detailed timestamps. Track nameserver migrations, IP changes, and hosting transitions over 15 years of data. Reverse lookups also show historical relationships — e.g., which domains previously used a nameserver or mail server. --- Last modified: 2026-02-14