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by dragonwriter 3004 days ago
That's probably because AT&T is using 1.1.1.1 for something internal and breaking the public internet for it's users: you get a really fast ping on 1.1.1.1, but it's not the 1.1.1.1 you are trying to reach.
2 comments

Is this just speculation or can anybody confirm?

    traceroute to 1.1.1.1 (1.1.1.1), 64 hops max, 52 byte packets
     1  1dot1dot1dot1.cloudflare-dns.com (1.1.1.1)  1.117 ms  0.710 ms  0.727 ms
Seems AT&T uses 1.1.1.1 inside of their modems. Oops!

Using 1.0.0.1 works.