Free tools / DNS and network

Route Trace (Traceroute)

The path from our server to any public host: each router, its network and the delay.

What this tool does

Every connection crosses a chain of routers run by different companies. When a site is slow, unreachable from one country, or drops partway, the useful question is where along that chain things go wrong, and whose network it is.

Enter a public host name or address. The trace lists each router on the way from our server in Hyderabad to the target, the time to reach it, its reverse DNS name where it has one and the network that announces its address. Routers inside our hosting provider's private network are shown as a single line without their addresses.

Reading the result

Hop
One router on the path, in order from our server.
Time
Round trip to that router in milliseconds. A rise that persists to the end is a real slowdown; a single slow hop followed by fast ones is only the router deprioritising our probe.
No reply
That router did not answer the probe. Many routers are set to stay silent, and traffic usually passes through them without trouble.
Network
The company that announces the router's address, found from its public routing registration (AS number).
Reached
The destination answered. If the path ends without reaching it, a firewall at or near the destination is most likely dropping the probe.
Path MTU
The largest packet that crosses the whole path unfragmented. Below 1500 usually means a tunnel or VPN in the middle.

Questions people ask

The trace did not reach the host but the site works. Why?

The probe is a small UDP packet to a high port, which many firewalls drop even when the website is fine. An unfinished trace is a reason to look, not proof of an outage. Check the port with the Open Port Checker.

Why are the first hops missing?

They are inside our hosting provider's private network. Their addresses say nothing about the path to your host, so they are collapsed into one line.

Does it show the route from my own network?

No. It shows the route from our server in India to the target. Your own route may differ, but the last few hops, near the target, are usually shared.

Why do the results change between runs?

Large networks spread traffic over several equivalent paths and change them as load shifts.

Can I trace to a private address?

No. Only public hosts are traced, and names that point to private addresses are refused.

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