An 'A' record points your domain to a traditional IPv4 address, while an 'AAAA' record points it to a newer IPv6 address. Because the internet is running out of IPv4 addresses, modern networks are migrating to IPv6. For maximum accessibility, configure both records in your DNS so all users can reach your site.
IPv4 (A) vs IPv6 (AAAA) Formats
A Record (IPv4): Points to a 32-bit address formatted as four numbers separated by dots. Example: 192.0.2.1
AAAA Record (IPv6): Points to a 128-bit address formatted as eight groups of hexadecimal digits. Example: 2001:0db8:85a3::8a2e:0370:7334
The "AAAA" name reflects that IPv6 addresses are four times longer than IPv4 addresses (128 bits vs 32 bits), hence four "A"s.
Both record types serve the same purpose: translating your domain name into an IP address. The difference is which protocol version they support.
Why It Matters in 2026
IPv4's ~4.3 billion addresses are exhausted. The internet has been rationing them for years through techniques like NAT (Network Address Translation).
IPv6 provides 340 undecillion addresses, enough for every device on Earth and beyond. Mobile carriers, cloud providers, and ISPs are aggressively adopting IPv6:
- Most mobile networks now default to IPv6
- Major cloud providers assign IPv6 addresses automatically
- Some regions have higher IPv6 traffic than IPv4
Users on IPv6-only networks can't reach IPv4-only websites without translation services. Supporting both ensures universal accessibility.
Decision Framework: Do You Need Both?
Short answer: Yes. Dual-stack (both A and AAAA records) is the standard approach.
| |
| IPv4 users only; IPv6 users need translation |
| IPv6 users only; breaks for most IPv4 networks |
| All users, maximum compatibility |
Until IPv6 adoption is universal, maintain both records. There's no downside to dual-stack, only expanded reach.
Implementation Steps
Step 1: Verify Your Host Supports IPv6 Check your hosting dashboard or ask support. Not all servers have IPv6 addresses assigned.
Step 2: Copy Your IPv6 Address Your host provides this in their control panel alongside your IPv4 address.
Step 3: Add Records in NameSilo
- Ensure you're using our nameservers: NS1.DNSOWL.COM, NS2.DNSOWL.COM
- Click the blue globe icon 🌎 next to your domain
- Click "Add DNS Record", default is A record for IPv4
- Add your A record with your IPv4 address
- Add another record, select AAAA, enter your IPv6 address
Step 4: Test Both Records Use DNS lookup tools to verify both A and AAAA records resolve correctly.
Common Mistakes
Adding AAAA without server support: Creating an AAAA record when your server isn't configured for IPv6 causes connection failures for IPv6 users. Verify server configuration first.
Incorrect IPv6 formatting: IPv6 addresses use colons, not dots. Double-colons (::) represent consecutive zeros. Copy exactly from your host.
Forgetting one record type: Adding only AAAA while removing A breaks IPv4 access. Keep both until you're certain all users have IPv6.
Mismatched TTL values: Use consistent TTL for both record types to ensure synchronized cache behavior.
What This Means for You
NameSilo's DNS Manager fully supports both A and AAAA records at no additional cost. Add, modify, or remove records instantly through our interface. Dual-stack configuration future-proofs your domain. As IPv6 adoption accelerates, you're already prepared. Search for your next domain knowing your DNS infrastructure can handle modern internet requirements. Frequently Asked Questions
What does AAAA stand for?Â
Four "A"s because IPv6 addresses are four times longer than IPv4.
Can I use only an AAAA record?Â
Not recommended. Many networks still rely on IPv4.
Does IPv6 make my website faster?Â
Sometimes. IPv6 can reduce latency by eliminating NAT overhead.
How do I know my IPv6 address?
Check your hosting control panel or ask your provider.
Will my site break if I don't have an AAAA record?Â
Not immediately. IPv6-only users may experience slower connections via translation.
What is dual-stack routing?Â
Running both IPv4 and IPv6 so either protocol can reach your server.
Does Google prefer IPv6?Â
No ranking preference, but Google fully supports IPv6.
How do I test my AAAA record?Â
Use DNS lookup tools or dig AAAA yourdomain.com.
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