On July 31, 2020, 01:23 AM UTC, http://www.stumbleupon.com/ presented signs of DNS tampering on AS16552 in United States. This might mean that http://www.stumbleupon.com/ was blocked, but [false positives](https://ooni.org/support/faq/#why-do-false-positives-occur) can occur. Please explore the network measurement data below.
OONI Probe version
Measurement Kit version