It is well known webmasters care about W3 Validator and fortunately W3 didn't find any error and warning on 4holepunch.org.
It is important for every website to open quick and be smooth while surfing. We see this site opens in 0 milliseconds and it is a really good score. This domain's nameservers are ns1.4holepunch.org and ns2.4holepunch.org.
On our researches we see 4holepunch.org doesn't get any visitor from search engines but we think this website is getting visitors directly. This website doesn't have any keyword, we think they should put at least one or two keywords. We see 4holepunch.org doesn't have DMOZ record that is why we don't think this site is secure to surf but since DMOZ wants money to add your site to Dmoz we can't say this site is 100% secure or not.We see that your website gets most of the users with these missed types;
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