YellowPages.com and Yelp.com - are they blocking proxies?

I tried several public elite high anonymous proxies to access YellowPages and Yelp but some can't access them, some can't go further than the home page etc. Anyone knows if these two sites block proxies? How can I get around this block?

SilverKnight said:

I tried several public elite high anonymous proxies to access YellowPages and Yelp but some can't access them, some can't go further than the home page etc. Anyone knows if these two sites block proxies? How can I get around this block?

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If you are referring to "public" elite proxies, are they from "free" sites, or proxy providers?

If you subscribe to public USA HTTPS proxies (very rare) from proxy providers, you would be able to find the working USA HTTPS proxies that will allow you to access to various sites, including YellowPages.com

See the screenshot here (using proxylist.co USA HTTPS proxy) using proxy tool FF addon to open the yellowpages.com web site as shown here:

Can I find free proxies on your site that can access those sites? When I say free, I mean totally free, no offers to fill out etc.

Also, can you tell me the difference between USA HTTP, USA HTTPS and USA SOCKS proxies?