How to Check if a Website Supports IPv6?

When using IPv6 proxies, it's essential to verify whether the target website supports IPv6. If a website does not support IPv6, any request made through an IPv6-only proxy will fail, regardless of whether the proxy itself is working properly.

This article outlines simple steps to verify a website's compatibility with IPv6 before troubleshooting or escalating issues.

🔍 1. Use an IPv6 Compatibility Checker Tool

You can easily test if a website is reachable via IPv6 using online tools. Here are a few we recommend:

✅ dnschecker.org - IPv6 Compatibility Checker

• Simply enter the domain (e.g., example.com)

• It will show whether an AAAA (IPv6) DNS record is present and globally reachable.

✅ IPv6-test.com

• This site also offers a website validation tool to see if the domain has working IPv6 connectivity.

✅ Ping.pe

• Enter the domain name and scroll down to the IPv6 ping tests.

• If the IPv6 pings from global locations fail or don't resolve, the site likely doesn't support IPv6.

✅ IntoDNS.com

• While primarily a DNS diagnostic tool, it also shows if a domain has an AAAA record under its DNS report.

🔧 2. Manual Terminal Check (For Advanced Users)

If you're familiar with the terminal or shell, you can use dig or nslookup to directly query the AAAA record of a website:

Using dig:

 

Using nslookup:

• If a website does not support IPv6, users must connect through an IPv4 proxy instead.
  
  

• Always test before raising a ticket or reporting that a proxy is not working—IPv6 compatibility of the destination matters.