Free Online Nameserver Lookup
Nameserver Lookup lets you query the DNS system to find every authoritative nameserver assigned to a domain. You can access five professional-grade tools in one workspace: a standard NS record lookup with automatic provider detection, a health checker for redundancy audits, a dedicated SOA record viewer, a side-by-side comparison tool, and a bulk processor for large domain lists. Simply enter a domain or upload your file to see results in seconds, powered by our high-performance DNS query engine.
NS Lookup
Queries nameserver records for any domain, showing hostnames, IP addresses, TTL, and detected DNS provider.
NS Health Check
Audits NS redundancy, network diversity, and SOA configuration with a score out of 100.
SOA Lookup
Retrieves the Start of Authority record with primary NS, serial, refresh, retry, expire, and minimum TTL fields.
NS Compare
Compares nameserver configurations between two domains, highlighting shared servers and providers.
Bulk Lookup
Processes domain lists from text or uploaded files with live progress and CSV export.
Online Nameserver Lookup for DNS Auditing and Domain Management
Identifying which nameservers control a domain is a critical step when you're troubleshooting resolution errors, planning a migration, or auditing a domain portfolio. When you start a search, you get results directly from Cloudflare DNS with every NS record sorted alphabetically for clarity. Each entry provides the hostname, resolved IP address, and TTL value, along with an automatic provider label for services like Cloudflare, AWS Route 53, or Google Cloud DNS.
Automatic DNS Provider Detection
The built-in database automatically recognizes over 25 major DNS providers by scanning the nameserver hostnames for you. You can spot Cloudflare or Route 53 at a glance, saving you the time of manual lookups. You'll find this particularly helpful when auditing client assets or researching competitor infrastructure.
Search History for Quick Revisits
Your recent lookups are automatically saved in the history panel for quick access. You can click any previous entry to restore results instantly without waiting for a new DNS query. This makes comparing different configurations during your session significantly faster and more efficient.
Check Nameserver Health, SOA Records, and Domain Configurations
Reliable DNS resolution starts with a properly configured nameserver and SOA setup. You can use the NS Health Checker to audit your nameserver count, network diversity, and SOA timing intervals to generate a score out of 100. The tool highlights exactly where your configuration is strong and where it needs work, awarding the highest scores to domains with diverse networks and recognized providers.
SOA Record Inspection with Human-Readable Values
SOA Lookup does more than just display a raw DNS string. You'll see every field clearly labeled with both the raw values and human-readable time conversions. This makes it easy to verify your primary nameserver, admin contact, and zone serial number at a glance. You can also copy the data to your clipboard or grab a CSV for your records.
Side-by-Side Nameserver Comparison
NS Compare lets you put two domain configurations side by side to instantly detect shared nameservers or identical providers. You can rely on this when planning migrations or auditing infrastructure to ensure your related domains are consolidated under the right management.
Free Nameserver Lookup for IT Administrators and Domain Managers
Whether you're migrating providers or troubleshooting propagation delays, you can find every lookup tool you need in this workspace. Use the Bulk Lookup tool to handle entire lists with a live progress bar and export your final results to CSV. You can access every feature here without an account or rate limits, and your queries travel securely through our minimal proxy directly to your browser.
Bulk Domain Processing with File Upload
Simply paste your domain list or upload a file to check NS records for every entry. You can track your progress with the live status bar as the tool works through your list in sequence. Every result row displays the domain status and detected provider, which you can then download as a CSV for your reports.
No Signup, No Limits, Lightweight DNS Proxy
You can access every subtool immediately without creating an account or signing in. All your queries use a lightweight proxy to Cloudflare DNS-over-HTTPS to ensure fast, reliable responses. Your domain queries remain private and are never logged or stored beyond your active session.
Related DNS and Network Tools
If you work with DNS and network infrastructure regularly, these tools complement what you can do here:
- Nameserver Health Checker -- audit NS redundancy and SOA configuration with a score out of 100
- SOA Record Lookup -- inspect Start of Authority records with human-readable timing values
- Nameserver Compare -- compare NS configurations between two domains side by side
- Bulk NS Lookup -- process domain lists with file upload and CSV export
- DNS Lookup -- query A, AAAA, CNAME, MX, TXT, and other DNS record types
- MX Lookup -- query MX records and check email authentication (SPF, DMARC)
- What Is My IP -- check your public IP address and connection details
- CIDR Calculator -- calculate subnet ranges, broadcast addresses, and IP allocation