It's a weird address that was going to cause problems like this
What's weird about it? It's a valid IP address, the fact that they are all 1's isn't noteworthy except it's easy to remember.
It seems a somewhat popular pattern for DNS:
1.1.1.1 1dot1dot1dot1.cloudflare-dns.com
2.2.2.2 not found
3.3.3.3 not found
4.4.4.4 not found
5.5.5.5 not found
6.6.6.6 not found
7.7.7.7 not found
8.8.8.8 google-public-dns-a.google.com
9.9.9.9 dns.quad9.net
But exactly like the commenter stated. Part of the goal is to fix IPs like this being inaccesible. This DNS is both easy to access and using what should be, a perfectly accessible IP
It's a nice, short, memorable address that Cloudflare has every right to use. What's wrong here?
Because some ATT and Cisco devices use that address already.
There is no reason to need to remember it.