1.1.1.1 not reachable from Telecom Italia / Interbusiness

Debug tool link.

1.0.0.1 works nicely:

traceroute to 1.0.0.1 (1.0.0.1), 64 hops max, 40 byte packets
 1  192.168.2.1  0.228 ms  0.235 ms  0.124 ms
 2  195.103.117.49  1.213 ms  0.953 ms  0.920 ms
 3  80.19.4.68  4.613 ms  4.728 ms  6.214 ms
 4  * * *
 5  * * *
 6  195.22.205.98  5.508 ms
    195.22.205.116  6.205 ms  6.730 ms
 7  195.22.208.117  6.031 ms
    195.22.208.79  26.300 ms
    195.22.208.117  6.252 ms
 8  195.22.196.97  6.134 ms  6.246 ms  5.724 ms
 9  1.0.0.1  5.562 ms  5.711 ms  5.516 ms

1.1.1.1:

traceroute to 1.1.1.1 (1.1.1.1), 64 hops max, 40 byte packets
 1  192.168.2.1  0.229 ms  0.239 ms  0.121 ms
 2  195.103.117.49  1.461 ms  1.038 ms  0.964 ms
 3  80.19.4.68  4.611 ms !N  4.679 ms !N  4.553 ms !N

Thanks for this information. I’ve asked our Network team to reach out to your service provider, to see if we can work with them to unblock access to 1.1.1.1.