To see who is hosting a website (e.g. netflix.com), you will need the IP address of the website and the WHOIS record for that IP address. You can obtain both from the command-line.
Obtain the IP address for netflix.com:
# Ping the website ping netflix.com # Alternatively, use traceroute and note the last IP address traceroute netflix.com
For me, the command returned the IP address 126.96.36.199. Now, look up the WHOIS record for the IP address to see who owns it:
# Look up the WHOIS record whois 188.8.131.52
Here is the record I got from WHOIS for netflix:
OrgName: Amazon Technologies Inc. OrgId: AT-88-Z Address: 410 Terry Ave N. City: Seattle StateProv: WA PostalCode: 98109 Country: US
So, at the time of writing, it seems that netflix.com was hosted by Amazon.