For many years, DSL/Cable routers by German company AVM, sold under the Fritz!Box brand, did some internal dns tweaking so that when you typed in http://fritz.box it would lead you to the config page of the router in your network. Now, years later, there actually is a .box TLD (Top Level Domain) and AVM forgot to register the fritz.box domain. Someone else did. And activated Certificate Pinning (HSTS). #Oops

UPDATE 2024-01-27: Their dns entries are flaky ATM, sometimes there, mostly not.