What is an IPv4-mapped IPv6 address?

It's a standard way to represent an IPv4 address inside IPv6 address space, using the ::ffff:0:0/96 range.

Can I actually use this address on a real network?

Many operating systems and libraries recognize this notation for dual-stack sockets, but actual routing behavior can vary by environment.

Is the IP I enter sent to a server?

No. The conversion happens entirely in your browser.

Does conversion give me IPv6 connectivity?

No — it is a notation change. Real IPv6 needs ISP and server-side IPv6 infrastructure.

Are there other mapped forms?

Historical variants like IPv4-compatible exist, but the standard today is the ::ffff: IPv4-mapped prefix.

🔀 IPv4 to IPv6 Converter

Convert an IPv4 address to IPv4-mapped IPv6 notation.

IPv4 address

How to use

Enter an IPv4 address.
The IPv4-mapped IPv6 address is shown as you type.

🎯 Use Cases

Check the mapped address when configuring dual-stack networking
Represent an IPv4 address on an IPv6-only system
Practice address conversion for networking study

Example

Input

8.8.8.8

Output

::ffff:808:808
::ffff:8.8.8.8

Converting the IPv4 address 8.8.8.8 to IPv4-mapped IPv6. The top line packs each octet pair into hexadecimal (::ffff:808:808), while the bottom line is the mixed notation that keeps the IPv4 part readable.

IPv4-mapped notation

Writing an IPv4 address inside the IPv6 space — a notation, not real IPv6 connectivity.

Concept	Details
IPv4-mapped	`::ffff:192.0.2.1` — an IPv4 address in IPv6 notation
Standard prefix	`::ffff:` — the mapping prefix defined in RFC 4291
Nature	Notation conversion only — IPv4 traffic works without IPv6 infrastructure
Common use	Presenting IPv4 addresses uniformly in IPv6 socket APIs and logs

FAQ

What is an IPv4-mapped IPv6 address?: It's a standard way to represent an IPv4 address inside IPv6 address space, using the ::ffff:0:0/96 range.
Can I actually use this address on a real network?: Many operating systems and libraries recognize this notation for dual-stack sockets, but actual routing behavior can vary by environment.
Is the IP I enter sent to a server?: No. The conversion happens entirely in your browser.
Does conversion give me IPv6 connectivity?: No — it is a notation change. Real IPv6 needs ISP and server-side IPv6 infrastructure.
Are there other mapped forms?: Historical variants like IPv4-compatible exist, but the standard today is the ::ffff: IPv4-mapped prefix.