What is IPv6 and why does my website need it?

IPv6 (Internet Protocol version 6) is the latest version of the Internet Protocol, replacing IPv4 which is running out of addresses. Your website needs IPv6 because:IPv4 addresses are exhausted; many ISPs only assign IPv6 to new usersUsers on IPv6-only networks cannot access IPv4-only websitesGoogle and search engines favor IPv6-enabled websitesBetter performance by eliminating NAT translation overhead

How is the IPv6 Ready score calculated?

The IPv6 Ready score (0-100) is based on 4 criteria:AAAA Web Server Records (40 points): Main domain has AAAA record pointing to IPv6 addressWWW Subdomain AAAA (10 points): www.domain also has its own AAAA recordNameserver IPv6 (20-30 points): NS have AAAA records, bonus if all NS support IPv6IPv6 Connectivity (20 points): Website is accessible via HTTPS over IPv680-100: IPv6 Ready | 50-79: Partial | 1-49: Limited | 0: No IPv6

What is an AAAA record?

An AAAA record (also called "quad-A") is a DNS record similar to an A record, but points to an IPv6 address instead of IPv4:A record: Maps domain to IPv4 address (e.g., 157.240.211.35)AAAA record: Maps domain to IPv6 address (e.g., 2a03:2880:f115:188:face:b00c:0:25de)To enable IPv6 for your website, add AAAA records in your DNS pointing to your web server's IPv6 address.

How do I make my website support IPv6?

To enable IPv6 for your website:Choose IPv6-capable hosting: Ensure your hosting provider assigns an IPv6 address to your serverAdd AAAA records: Create AAAA records in DNS for your domain and www subdomainConfigure web server: Ensure Nginx/Apache listens on both IPv4 and IPv6Check firewall: Open ports 80/443 for IPv6 trafficUse IPv6-capable DNS: Your nameservers should also have AAAA records

Why does the IPv6 connectivity test fail even though I have AAAA records?

Having AAAA records doesn't guarantee your website is reachable via IPv6. Common causes:Firewall blocking IPv6: Firewall only allows IPv4 connections on ports 80/443Web server not binding IPv6: Nginx/Apache only listens on IPv4CDN/Proxy lacks IPv6: If using a CDN, it needs to support IPv6IPv6 routing issues: Network path from test server to your website is brokenIncorrect AAAA record: IPv6 address in AAAA is wrong or not active

IPv6 Ready Check — Website IPv6 Readiness Tool

IPv6 Ready Check evaluates your website's IPv6 readiness. Enter a domain name to check AAAA records, nameserver IPv6 support, and IPv6 connectivity. The tool scores your domain 0-100 with detailed results for each criterion.

How to Use IPv6 Ready Check

IPv6 Ready Check performs a comprehensive analysis of your website's IPv6 readiness, including AAAA records, nameserver IPv6 support, and actual IPv6 connectivity testing.

Steps:
Enter the domain name to check (e.g., bkns.vn, google.com)
Click "Check" to start the analysis
View the IPv6 score (0-100) and readiness label: IPv6 Ready, Partial IPv6, Limited IPv6, or No IPv6
Review AAAA records for the web server and www subdomain
Check which nameservers support IPv6
See the IPv6 connectivity test result

When to Use IPv6 Ready Check

IPv6 Ready Check is useful in many scenarios:

Network administrators: Verify your DNS infrastructure fully supports IPv6
Website owners: Ensure your website is accessible from IPv6-only networks
Hosting providers: Confirm IPv6 is properly configured for customer domains
DevOps engineers: Audit infrastructure before deploying dual-stack IPv4/IPv6
SEO specialists: Google favors IPv6-enabled websites for better search ranking

🖥️Need a reliable Cloud VPS?

BKNS Cloud VPS — SSD NVMe, 99.99% uptime, 24/7 tech support

View Cloud VPS

Technical Information

IPv6 Ready Check performs 3 main checks and calculates a total score from 0-100:

Check categories:
AAAA Web Server Records (40 points): Checks if the main domain has AAAA records pointing to IPv6 addresses
WWW Subdomain AAAA (10 points): Checks if www.domain has its own AAAA record
Nameserver IPv6 (20-30 points): Checks if nameservers have AAAA records, with bonus if all NS support IPv6
IPv6 Connectivity (20 points): Attempts actual HTTPS connection to the website via IPv6
Rating scale:
80-100: IPv6 Ready — Website is fully prepared for IPv6
50-79: Partial IPv6 — Some support present, needs improvement
1-49: Limited IPv6 — Minimal IPv6 support detected
0: No IPv6 — No IPv6 support found

Frequently Asked Questions

Related Tools

Show My IP

Công cụ kiểm tra IP công khai và thông tin mạng chi tiết, sử dụng ngay không cần cấu hình.

ASN Lookup

Công cụ tra cứu ASN giúp xác định tổ chức quản lý địa chỉ IP và mạng của bạn.

DoH/DoT Server Checker

Kiểm tra tính khả dụng và hiệu suất của các máy chủ DNS qua HTTPS (DoH) và TLS (DoT). Xác minh cấu hình DNS an toàn và tối ưu hóa kết nối mạng của bạn.

IP Info Lookup

Tra cứu thông tin IP nhanh chóng: vị trí, ISP, tổ chức và dữ liệu mạng chi tiết.