# How do the websites know I am using Proxy and sometimes VPN?

**URL:** <https://onehack.st/t/how-do-the-websites-know-i-am-using-proxy-and-sometimes-vpn/121732>\
**Category:** Discussion & Solutions\
**Tags:** solved\
**Created:** [October 1, 2020, 6:17am UTC](https://onehack.st/t/how-do-the-websites-know-i-am-using-proxy-and-sometimes-vpn/121732 "2020-10-01T06:17:23Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![cylance007](https://onehack.st/user_avatar/onehack.st/cylance007/32/57944_2.png) [@cylance007](https://onehack.st/u/cylance007)\
**Post date:** [October 1, 2020, 6:17am UTC](https://onehack.st/t/how-do-the-websites-know-i-am-using-proxy-and-sometimes-vpn/121732/1 "2020-10-01T06:17:23Z")

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Hi guys,

Recently I went on to some sites by using web proxy extension on chrome but the website detected that I am using proxy and I wan unable to sign-up. Whats the reason behind that and how that website know ?

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**Author:** ![Techtanic](https://onehack.st/user_avatar/onehack.st/techtanic/32/92090_2.png) [@Techtanic](https://onehack.st/u/Techtanic)\
**Post date:** [October 1, 2020, 9:26am UTC](https://onehack.st/t/how-do-the-websites-know-i-am-using-proxy-and-sometimes-vpn/121732/2 "2020-10-01T09:26:02Z")

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There are many APIs that can detect VPN or proxy.  
Basically Residential IPs are good

![image](https://onehack.st/uploads/default/original/3X/c/2/c2156a1953753f5738a34fc9c985a2226bf980f9.png)

One website the provides a really good API is [https://iphub.info/](https://iphub.info/) .  
Before going to the website check ur IP if its residential u are good to go.

**Solution**  
For a fact i know that most [https://browsec.com/en/](https://browsec.com/en/) IPs are residential. They provide a free browser extension.