We use this IP to conduct our research. If you have received incoming traffic from us, you are likely part of the Alexa/Tranco lists of the top one million websites and thus in scope for our Internet-wide studies. You can find more information about our institute and research here: Research at IAS
If you would like to be excluded or have any other concerns, contact 'ias [at] tu-braunschweig.de'.
(For our experiments, we intentionally use a separate domain. If you doubt the authentency of this domain, you can visit this website hosted on the offical TU Braunschweig domain to verify that ias-lab.de is indeed operated by the Institute for Application Security.)