Test any URI, by sending custom HTTP request and checking the HTTP response. TestURI.org is a free web-sniffer.net alternative.

Page URI/URL
HTTP version:  HTTP/1.1   HTTP/1.0
User agent:  
HTTP protocol is descibed in RFC 2616.
Your IP is: 216.73.216.24. Find IP location for: 21.162.159.207, 129.125.2.54, 255.7.154.191, 42.126.146.23, 249.178.9.44, 67.147.50.126, 46.237.160.192, 131.87.50.5, 220.40.186.43, 212.103.93.174, 193.62.6.154.
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