Can not reach 1.1.1.1, only 1.0.0.1

I’m using Brazilian NET broadband access and cannot reach by nslookup/traceroute ip 1.1.1.1 but I can do anything to 1.0.0.1 .

This is not an uncommon problem. Some hardware has improperly assigned 1.1.1.1 for itself, but here are some tips:

Seems to be hijacked by something. It’s most likely your router or your ISP, which would be the worst case.
Run a traceroute to 1.1.1.1 and check where it gets stuck.

Windows
tracert -d 1.1.1.1

Linux/MAC
traceroute -n 1.1.1.1