Free Domain, DNS, IP, Email & Website Tools

Diagnose & Manage DNS

• NsLookup Tool

  Instantly look up any DNS record — A, MX, CNAME, TXT and more — directly from authoritative name servers.
  
  

• DNS Report Tool

  Get a comprehensive DNS health report for your domain, covering both IPv4 and IPv6 configuration and common misconfigurations.
  
  

• DNS Propagation Checker

  See how your domain's DNS records are resolving across multiple public DNS servers worldwide — essential after making DNS changes.
  
  

• Reverse DNS Lookup Tool

  Look up the reverse DNS hostname (PTR record) for any IPv4 or IPv6 address.
  

Connectivity & Diagnostics

• Ping Tool

  Check whether a host is online and measure response times in real time (IPv4 & IPv6).
  
  

• Traceroute Tool

  Trace the exact path network packets take across the internet to any IP address or hostname (IPv4 & IPv6).
  
  

• NTP Server Test Tool

  Verify your NTP server is reachable from the internet and responding correctly (IPv4 & IPv6).
  

Look Up Domain & IP Ownership

• WHOIS Lookup 2.0 (RDAP) — Modern Registration Data

  Look up the public registration details for a domain name, IP address, IP range, or ASN using the modern RDAP protocol.
  
  

• Standard WHOIS Lookup — Legacy Tool

  Query traditional WHOIS servers for domain or IP registration data.
  
  

• IP Address Information Tool

  Find the geographic location, ISP, and network details for any IPv4 or IPv6 address.
  
  

• What's My IP Address?

  Instantly see your public IPv4 and IPv6 addresses as seen from the internet.

Test Email Delivery & Spam Status

• Mail Server Test Tool

  Check the health and configuration of your domain's mail servers, including MX records and connectivity (IPv4 & IPv6).
  
  

• SMTP Email Test Tool

  Verify that your domain or email address can successfully receive email via SMTP (IPv4 & IPv6).
  
  

• Spam Database Lookup — DNSBL

  Find out if your IP address is listed on a spam blacklist that could be blocking your email.
  
  

• Spam Database Lookup — URIBL

  Check whether your domain name appears on any URI-based spam block lists.

Audit Websites & SSL Certificates

• Is My Website Down?

  Instantly check whether your website is accessible from outside your network right now.
  
  

• SSL/TLS Certificate Checker

  Verify your SSL/TLS certificate is valid, correctly installed, and that your web server is sending the right security headers.
  
  

• HTTP Response Header Viewer

  Inspect the HTTP response headers returned by any website or redirect, over both HTTP and HTTPS.