[rb12345]

My cached results seem to have a cname of "star.c10r.facebook.com", which works:

    Non-authoritative answer:
    Name:    star.c10r.facebook.com
    Addresses:  2a03:2880:10:8f01:face:b00c:0:1
          31.13.72.23
    Aliases:  www.facebook.com