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When your browser requests a web page from a server, the server responds with a set of HTTP headers followed by the contents of the page. You can use the form below to see what these are.
Note about the Last-Modified header:
A common header returned is "Last-Modified", which can tell you when the page was last updated. The server isn't required to return it, but if it does it can sometimes be useful. Also, some servers just respond with the current date and time, so it's not reliable at all. But it can be handy to know, especially if you find out that a page hasn't been updated for years.
URL to get headers for:
headers to display: HTTP version:
Error: Sorry, there was an error connecting to host www.www.krosno24.pl on port 80: 0 - php_network_getaddresses: getaddrinfo failed: Name or service not known