I have a landline connection provided by my ISP, but don't have a phone plugged in. By chance, I noticed that my router nonetheless eagerly logs every attempt to call my landline number.
Aside from a few spam calls, I was mostly called by survey institutes. A total of 12(!) calls by infas in the span of 3 weeks, and a total of 14(!) by forsa in 5 weeks. I know follow-up calls are important, but that feels excessive.
(Screenshot shows an excerpt, all of them are public numbers by companies.)
