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Domain Lookup - DNS Records & Infrastructure Analysis

Analyze any domain's complete DNS configuration including A records, nameservers, mail servers, and TXT records. Robtex domain lookup maps the full infrastructure supporting a website or email service.

Complete DNS Visibility

Domain lookup retrieves all public DNS records and visualizes their relationships:

  • A / AAAA records - IPv4 and IPv6 addresses where the domain resolves
  • NS records - Authoritative nameservers controlling DNS for the domain
  • MX records - Mail servers handling email for the domain
  • TXT records - SPF, DKIM, domain verification, and other text records
  • CNAME records - Aliases pointing to canonical hostnames
  • SOA records - Zone authority information and serial numbers

Investigating Domain Infrastructure

Enter any domain name to see its DNS configuration. Results show not just the records themselves but their relationships - which other domains share the same nameservers, which IPs host multiple sites, which mail providers handle delivery.

This graph view reveals infrastructure patterns. A domain using Cloudflare nameservers with Google Workspace mail and AWS hosting tells a different story than one using a single shared hosting provider for everything.

Practical Applications

Pre-purchase due diligence - Before acquiring a domain, check its current DNS state, historical infrastructure, and any lingering records from previous owners.

Migration planning - Document existing DNS configuration before switching providers. Identify all records that need recreation at the new host.

Email deliverability - Verify MX records point to correct mail servers and that SPF/DKIM TXT records are properly configured.

CDN and hosting analysis - Determine what infrastructure a site uses based on its A records and CNAME chains.

Beyond Basic DNS

Robtex correlates DNS data across millions of domains. When you look up a domain, you see not just its records but context: how many other domains use the same nameservers, what hosting patterns exist, and how the infrastructure compares to similar sites.

→ Analyze a domain

FAQ

Does domain lookup work for subdomains?
Yes. Enter any subdomain like mail.example.com or api.example.com to see its specific DNS records.
How often is DNS data updated?
DNS records are queried in real-time. You see the current live configuration, not cached historical data.
What if a domain shows no records?
The domain may not exist, may have expired, or may have no public DNS records configured. Check that you entered the domain correctly.
Can I see historical DNS records?
Current lookup shows live data. For historical DNS analysis, the domain's record history may show previous configurations.