IPv6 is the future — more addresses, better security, faster routing. IPv4 still works but will be phased out. Both exist side-by-side today.
Factor
IPv4
IPv6
Address Length
32-bit (192.168.1.1)
128-bit (2001:0db8::1)
Total Addresses
4.3 billion
340 undecillion
Security
❌ No built-in
✅ IPsec included
Compatibility
✅ 100%
⚠️ ~40% of sites
IPv4
Original IP protocol with 4.3 billion addresses (running out).
✓ Pros
Widely supported everywhere
Simpler format (192.168.1.1)
All devices compatible
✗ Cons
Running out of addresses
Requires NAT workarounds
No built-in security
IPv6
New IP protocol with 340 undecillion addresses (unlimited).
✓ Pros
Unlimited addresses
Built-in encryption (IPsec)
No NAT needed
Faster routing
✗ Cons
Not all sites support it
Longer addresses (harder to remember)
Slower adoption
The Verdict
IPv6 is objectively better but IPv4 still works. Most ISPs provide both. Your device will use IPv6 when available and fall back to IPv4. No action needed.
Frequently Asked Questions
Will IPv4 stop working?
Not anytime soon. Both protocols will coexist for 10+ years.
Is IPv6 faster than IPv4?
Slightly. IPv6 has simpler routing which can reduce latency by a few milliseconds.
How do I enable IPv6?
Contact your ISP. Most modern ISPs provide IPv6 automatically.