RTT.ICU

About this tool

Run an online MTR report that combines traceroute and continuous ping to expose packet loss and latency spikes on every hop of the path.

  • Enter the host you want a sustained path-quality report for.
  • Select the probe region closest to the affected users.
  • Watch Loss% and Avg columns per hop; the first hop showing sustained loss usually marks the fault boundary.
Frequently asked questions
When should I use MTR instead of traceroute?
Use MTR when a problem is intermittent. It sends packets continuously along the path and accumulates statistics, so brief loss bursts and latency spikes show up in the Loss% and Best/Worst columns instead of hiding in one snapshot.
How do I read MTR output?
Each row is one hop. Look for the first hop where sustained loss appears and stays through the remaining hops: that hop marks where the network path degrades. If loss appears mid-path but disappears later, the router may just be rate-limiting ICMP.
Is MTR hard on the target network?
An MTR report sends roughly one packet per second per hop, similar to a slow continuous ping. It is safe for diagnostics but should not be used for load testing.