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DNS3 min
What is a DNS AAAA Record and Do You Need IPv6?
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NameSilo Staff7/8/2026
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A DNS AAAA record maps a domain name to a modern IPv6 address, whereas standard A records map to IPv4 addresses. You need an AAAA record if your web host uses an IPv6 network architecture. Adding it ensures faster, more direct routing across next-generation mobile devices and IPv6-native networks.
IPv4 vs IPv6: The Address Space Problem
Every server requires a unique numerical identifier.
Protocol | Format | Example | Total Addresses |
IPv4 | 32-bit decimal | 192.168.1.1 | ~4.3 billion |
IPv6 | 128-bit hexadecimal | 2001:db8::1 | 340 undecillion |
The problem: 4.3 billion IPv4 addresses sounded like plenty in 1983. The explosion of smartphones, IoT devices, and cloud infrastructure exhausted the global pool. IANA allocated the last IPv4 blocks in 2011.
The solution: IPv6 uses 128-bit hexadecimal addresses with an effectively unlimited pool.
A records point to IPv4. AAAA records point to IPv6. The four A's represent that IPv6 is four times the bit length of IPv4.
Why It Matters: IPv4 Exhaustion
IPv4 depletion created NAT (Network Address Translation), where multiple devices share a single public address through translation tables inside routers and carrier networks.
NAT problems: adds latency, complicates peer-to-peer connections, and creates extra failure points.
IPv6 eliminates NAT. Every device gets its own globally routable address with no translation overhead.
Performance: Native IPv6 Routing on Mobile
Major carriers in the US, India, and Germany now run primarily IPv6 internally. A visitor on an IPv6-native mobile network visiting an IPv4-only site must pass through a translation gateway. Adding an AAAA record lets IPv6 clients connect directly, skipping that translation layer entirely.
The latency difference is small but consistent. For high-traffic sites, eliminating translation overhead adds up across millions of requests.
Decision Framework: A Record, AAAA, or Both?
Configuration | Coverage | Recommended For |
A record only | IPv4 clients | Legacy systems |
AAAA record only | IPv6 clients | IPv6-only networks |
A + AAAA (dual-stack) | All clients | Most modern setups |
Dual-stack is the right approach. Running both records simultaneously means IPv6-capable clients use AAAA, while IPv4-only clients fall back to the A record automatically. Both records can safely point to the same hostname and coexist without conflict. The resolver selects the appropriate record through "Happy Eyeballs," which tries both connections and uses whichever responds first.
Implementation Steps: Add an AAAA Record at NameSilo
Step 1: Log into NameSilo and go to Domain Manager.
Step 2: Confirm your domain uses NameSilo's default nameservers (NS1.DNSOWL.COM, NS2.DNSOWL.COM, NS3.DNSOWL.COM).
Step 3: Click on the Domain and then select the “DNS” Tab.
Step 4: Click "Add New DNS Record" and select type AAAA.
Step 5: Enter the record fields:
- Host: @ for root domain, www for subdomain
- IPv6 Address: provided by your hosting provider
- TTL: 3600 (recommended)
Step 6: Click Submit. Propagation typically takes 15-30 minutes.
Get your IPv6 address from your hosting provider. Do not construct it manually.
Common Mistakes
Entering an IPv4 address in the AAAA field: An address like 192.168.1.1 in an AAAA field is a fatal syntax error. AAAA fields require a valid IPv6 address in hexadecimal colon notation (e.g., 2001:db8:85a3::8a2e:370:7334).
Adding AAAA when your host doesn't support IPv6: If your server only has an IPv4 address, there is nothing to point AAAA to. Check with your hosting provider first.
Removing the A record after adding AAAA: AAAA alone excludes all IPv4 clients. Always maintain both records.
What This Means for You
NameSilo's DNS Manager supports AAAA records at no cost. A and AAAA records for the same domain coexist in the same DNS table without conflict. If you need a domain to configure, search available names at NameSilo.
Frequently Asked Questions
What does AAAA stand for in DNS?
Four times the bit length of IPv4: 128-bit vs 32-bit address space.
What is the difference between an A and AAAA record?
A records point to IPv4; AAAA records point to IPv6 addresses.
How do I find my server's IPv6 address?
Check your hosting control panel or ask your hosting provider.
Is IPv6 faster than IPv4 for websites?
On IPv6-native networks, yes, by eliminating translation overhead.
Can I have both an A and AAAA record?
Yes. Dual-stack is the recommended configuration.
Will missing an AAAA record break my site?
No. IPv4-only sites still work via translation gateways.
What does a valid IPv6 address look like?
Hexadecimal groups separated by colons: 2001:db8::1.
How do I add an AAAA record at NameSilo?
Domain Manager, blue globe icon, Add New DNS Record, select AAAA.
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NameSilo StaffThe NameSilo staff of writers worked together on this post. It was a combination of efforts from our passionate writers that produce content to educate and provide insights for all our readers.
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