Summary

dns1.sjl.youtube.com, dns2.sjl.youtube.com, sjl-v3.sjl.youtube.com, sjl-v1.sjl.youtube.com, sjl-v5.sjl.youtube.com and at least 100 other hosts are subdomains to this hostname. youtube.com is a domain controlled by four nameservers at google.com. All of them are on different IP networks. Incoming mail for youtube.com is handled by one mailserver at sjl.youtube.com. youtube.com has three IP numbers. All of them are on different IP networks.