Is this webpage loaded with

Multipath TCP?

{{pageLoadWasMPTCP ? "YES" : "NO"}}*, {{smallerBigNotice}}

By clicking on the following button, you accept that we collect, store, and use your anonymized data and measurements for research purposes.

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Click here for details how to install the MPTCP Linux Kernel implementation.

This page is inspired by amiusingmptcp.com, but provides some additional features.

* NO, this page was loaded on port {{pageLoadPort}} without MPTCP support. You may or may not have MPTCP installed. Maybe it works on other ports. Just start the additional measurements and find out :-)

* YES, this page was loaded on port {{pageLoadPort}} with MPTCP support. You may or may not have MPTCP on other ports. Just start the additional measurements and find out :-)

Multipath TCP On Different Ports

Some middleboxes block Multipath TCP on certain ports. It's possible, for example, that a middlebox blocks MPTCP on port 80, but not on other ports. The table below shows some common TCP ports and if the connection between you and our server uses MPTCP on this port.

As Multipath TCP creates multiple subflows, you might be curious about the number of subflows you currently use to communicate with our webpage. We recurringly measure and show the number of sublfows for MPTCP connections.

Speed Test

If you want to see how Multipath TCP boosts your bandwidth, just start a speed test.

Select Port:

Select Scheduler:


Throughput (Last)Throughput (Avg)
Overall{{currentDown}}{{avgDown}}
#{{subflow.id}} {{subflow.currentDown}} {{subflow.avgDown}}

This speedtest is still experimental. Sampling the subflows throughput at the server side might introduce small artefacts. Please inform us if you experience problems.

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