No Internet - No homey functions?

I guess accessing Homey using the http://homey.local trick works based on mDNS, you don’t need the regular DNS server settings for that and mDNS is for Home-networking enabled by default in Windows 10 ( and maybe many other OS’s )

I tried the trick and wondered which of the Homeys would respond.
Homey broadcasts its name (if you rename your Homey) as .local in the mDNS client.

So my 3 Homeys are available by their respective names http://homey.local http://homeyRD.local and http://homeyProd.local. You only need an Internet connection to log on.