curl --head http://www.zappos.com/ http://www.zappos.com/ It's worth doing yourself because they give different messages with each request in fields like X-Cor

curl --head http://www.zappos.com/ http://www.zappos.com/ It's worth doing yourself because they give different messages with each request in fields like X-Core-Value but here's an example for the lazy: HTTP/1.1 200 OK Server: nginx/1.1.14 Content-Type: text/html; charset=utf-8 X-Powered-By: Ponies! X-Varnish-TTL: 60m X-Varnish: 1001887650 1001881441 X-Cache-Hits: 2832 X-Varnish-Host: varnish04.zappos.net X-Varnish-ID: drupal X-Core-Value: 4. Be Adventurous, Creative, and Open-Minded X-Recruiting: If you're reading this, maybe you should be working at Zappos instead. Check out jobs.zappos.com X-UUID: c687de54-4df3-11e1-b455-00215e22da70 Cache-Control: max-age=583 Date: Fri, 03 Feb 2012 00:05:21 GMT Connection: keep-alive