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How to retrieve ISP?


ignace

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The web site that you saw do this feat (showing you your isp name); what they most likely did was:

$_SERVER['REMOTE_addr']; //gets the client IP

then they probably queried whois.arin.net with fread() or similar to get the registered owner of that IP (which would be your provider (if they are tier 1, otherwise it will return your provider's provider))

The whois data adhere's to conventions and standards so the web site new what and where to look to get your ISP's name.
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