connectivity to docker registry suddenly stopped

Hello, Suddenly I was not able to do any docker builds. It seems that I am blocked from reaching registry-1.docker.io. Any thoughts? thx

root@xxxxx nginx]# nc -w 5 -v registry-1.docker.io Ncat: Version 7.50 ( https://nmap.org/ncat ) Ncat: Connection to 34.226.69.105 failed: Connection timed out. Ncat: Trying next address... Ncat: Connection to 3.219.239.5 failed: Connection timed out. Ncat: Trying next address... Ncat: Connection to 54.196.99.49 failed: Connection timed out. Ncat: Trying next address... Ncat: Connection to 2600:1f18:2148:bc02:2640:1b90:cea6:b6b5 failed: Network is unreachable. Ncat: Trying next address... Ncat: Connection to 2600:1f18:2148:bc00:41e1:f57f:e2e2:5e54 failed: Network is unreachable. Ncat: Trying next address... Ncat: Network is unreachable.