Ping
Checks ICMP reachability and can reveal round-trip latency and packet loss when the destination responds.
Network reachability diagnostics
IP Ping and Reachability Tool
Test a public IP address or domain from the Zerolink server using ping, traceroute or reverse DNS.
Public targets only Server-side test Live result
01
Run a network test
Choose one diagnostic and enter a public destination.
Test only destinations you own or are authorised to diagnose. Results originate from the Zerolink server, not your device.
Read the result correctly
What each network diagnostic tells you
Traceroute
Shows up to 12 network hops from our server. Asterisks often mean a router is filtering diagnostic replies.
Reverse DNS
Finds the PTR hostname published for the destination IP. Missing PTR data does not mean the host is offline.
Understand the test location
This tool measures from Zerolink’s hosting server. For your own connection quality, use the Internet and WiFi Speed Test.
Ping and traceroute questions
What does a ping test measure?
Ping sends small ICMP requests and reports whether the destination responds, along with round-trip time and packet loss when the server provides those values.
Why can a working website fail a ping test?
Some hosts and firewalls block ICMP traffic while still allowing web, email or application connections. A failed ping alone does not prove that a service is offline.
What does traceroute show?
Traceroute displays network hops between the Zerolink diagnostic server and the destination. Missing hops can occur when routers suppress diagnostic responses.
What is a reverse DNS lookup?
A reverse DNS lookup asks for the PTR hostname associated with an IP address. Not every public IP has a PTR record.
Is the test run from my device?
No. Ping and traceroute run from the Zerolink web server, so latency and routing can differ from results produced on your own connection.