Friendly reminder that 1.1.1.1 is a real, valid, public IP.
Seen plenty of networks that don’t recognize this, use it for some internal purpose, and break https://1.1.1.1/
AFAIK Cisco used 1.1.1.1 as an example "dummy" IP in their wireless LAN controller documentation, which of course led to infinite idiots copy/pasting exactly that and setting up broken networks.