{"id":1055,"date":"2020-05-11T00:46:47","date_gmt":"2020-05-11T00:46:47","guid":{"rendered":"https:\/\/blacklab.net\/?p=1055"},"modified":"2020-10-23T09:08:02","modified_gmt":"2020-10-23T13:08:02","slug":"how-do-they-know-you-are-on-a-vpn","status":"publish","type":"post","link":"https:\/\/blacklab.net\/how-do-they-know-you-are-on-a-vpn\/","title":{"rendered":"How Do They Know You Are On A VPN"},"content":{"rendered":"\t\t
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How do websites know your’e coming from a VPN? The answer to that question is pretty easy…. Technology.<\/p>\n\n
Companies Sell The Data<\/h4>\n\n
There are many companies that compile and sell IP address provider data. IPQualityScore is just one such company.<\/p>\n\n
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IPQualityScore maintains the most accurate database of VPN providers, including new servers and nodes that are added each day. By querying our API or processing a list of IP addresses, it’s very easy to accurately\u00a0check if an IP addresses belong to a VPN provider<\/strong>. The VPN IP address can also be analyzed for risk analysis, location, and behavior history and similar data.<\/p>\n<\/blockquote>\n\n
IP Blocking<\/h4>\n\n
A company like IPQualityScore might compile the data, but other companies like Cloudflare implement that data. Cloudflare can deny you access to a site if your IP address triggers an event. Maybe your IP address belongs to a company that hosts VPNs. One way to match an IP address to a company is via their ASN number. ASN numbers can tell other companies what their IP address might be used for. The example below is from NordVPN when I was testing out various VPN providers. While using NordVPN my IP address 64.44.55.156 was blocked from visiting a site. This happed quite a few times while testing their VPN service. But what this shows is that NordVPNs IP address (64.44.55.156) is owned by Nexeon Technologies a “Network Sharing Device or Proxy Server” service with ASN 20278.<\/p>\n\n