Discussions

32-b.it and 64-b.it are public suffixes offered by https://registry.openhost.uk/ with strict registration rules. They were once associated with https://now-dns.com/ during a period of being abused by their customers, but this is no longer the case under new management.

nslookup 64-b.it 76.76.2.2
Server:  p2.freedns.controld.com
Address:  76.76.2.2

Non-authoritative answer:
Name:    64-b.it
Addresses:  ::
          0.0.0.0

nslookup 32-b.it 76.76.2.2
Server:  p2.freedns.controld.com
Address:  76.76.2.2

Non-authoritative answer:
Name:    32-b.it
Addresses:  ::
          0.0.0.0

Domains on this list https://publicsuffix.org/list/ should be blocked at the second level (e.g., block bad-people.example.com but not example.com if example.com is considered a public suffix).