Free online diagnostic tools to analyze and troubleshoot your network connection. Check latency, trace routes, query DNS and more.
Check the latency and connectivity to a host or IP address.
Trace the network route to a destination. Shows each hop along the way.
Query DNS records for any domain (A, AAAA, MX, NS, TXT, CNAME).
Get registration information for any domain name.
Scan common ports on a host to check which services are running.
Network diagnostic tools are essential for troubleshooting connectivity issues, analyzing network performance, and understanding how data travels across the internet. Each tool serves a specific purpose in the network diagnostic process.
Ping is the most basic network tool. It sends ICMP echo request packets to a target host and measures the round-trip time. This helps determine if a host is reachable and how long it takes for data to travel to and from that host.
Traceroute shows the complete path that packets take to reach a destination. It displays each router (hop) along the way, helping identify where network problems occur. The tool works by sending packets with increasing TTL (Time To Live) values.
DNS Lookup queries the Domain Name System to translate domain names into IP addresses. It can retrieve various record types including A (IPv4), AAAA (IPv6), MX (mail servers), NS (name servers), and TXT records.
WHOIS provides registration information about domain names, including the registrar, registration date, expiration date, and contact information. This is useful for researching domain ownership.
Port scanning checks which network ports are open on a host. Open ports indicate services running on the system, such as web servers (port 80/443), mail servers (port 25), or SSH (port 22).