Convert any IPv4 address to its IPv6 equivalent formats — including IPv4-mapped, IPv4-compatible, and 6to4 tunnel addresses. All conversions run locally in your browser.
As the internet transitions from IPv4 to IPv6, network administrators and developers need to work with both address formats. An IPv4 to IPv6 converter translates the older 32-bit IPv4 addresses into the newer 128-bit IPv6 format. This is essential for dual-stack networks, tunnel configurations, and application development that must support both protocols.
If you're already familiar with subnetting and binary IP representation, understanding the conversion process is straightforward. Each IPv4 octet is converted to its hexadecimal equivalent and placed within the IPv6 address structure.
There are several ways to represent an IPv4 address within the IPv6 space. Each format serves a different purpose in network address translation and routing:
| Format | Prefix | Example (for 192.168.1.1) | Use Case |
|---|---|---|---|
| IPv4-Mapped | ::ffff: | ::ffff:c0a8:0101 | Dual-stack sockets, most common format |
| IPv4-Compatible | :: | ::c0a8:0101 | Deprecated (RFC 4291), automatic tunneling |
| 6to4 Tunnel | 2002: | 2002:c0a8:0101::1 | 6to4 transition tunnels (RFC 3056) |
| ISATAP | varies | ::0:5efe:192.168.1.1 | Intra-site tunneling (deprecated) |
| Teredo | 2001:0000: | varies | NAT traversal for IPv6 over UDP |
| NAT64 | 64:ff9b:: | 64:ff9b::c0a8:0101 | Stateful IPv6-to-IPv4 translation |
Pro Tip: The IPv4-mapped format (::ffff:x.x.x.x) is the one you'll encounter most frequently. It's used by dual-stack applications and operating systems to represent IPv4 connections within IPv6 sockets. If you're configuring your router for dual-stack, this is the format to know.
Converting IPv4 to IPv6 involves three simple steps:
You can verify each octet's hex value using our Hex IP Converter or check the full binary representation with the IP to Binary Converter.
Understanding why conversion is necessary requires knowing the fundamental differences between the two protocols. If you've used our IPv6 Converter to expand or compress addresses, you've already seen how much larger IPv6 is:
| Feature | IPv4 | IPv6 |
|---|---|---|
| Address Length | 32 bits (4 bytes) | 128 bits (16 bytes) |
| Address Format | Dotted decimal (192.168.1.1) | Colon hexadecimal (2001:db8::1) |
| Total Addresses | ~4.3 billion | ~340 undecillion (3.4 × 10³⁸) |
| Header Size | 20-60 bytes (variable) | 40 bytes (fixed) |
| NAT Required | Yes, commonly (learn more) | No — end-to-end connectivity |
| Auto-Configuration | DHCP (learn more) | SLAAC + DHCPv6 |
| Security | Optional IPsec | Mandatory IPsec support |
There are several practical scenarios where converting between formats is essential:
Here are commonly used private and special-purpose IPv4 addresses and their IPv6 mapped forms. If you manage a home network through 10.0.0.1 or 192.168.0.1, these conversions are useful for dual-stack configurations:
| IPv4 Address | Purpose | IPv6-Mapped Form |
|---|---|---|
| 0.0.0.0 | Unspecified | :: |
| 127.0.0.1 | Loopback | ::1 |
| 192.168.1.1 | Common router gateway | ::ffff:c0a8:0101 |
| 10.0.0.1 | Private network gateway | ::ffff:0a00:0001 |
| 8.8.8.8 | Google DNS | ::ffff:0808:0808 |
| 1.1.1.1 | Cloudflare DNS | ::ffff:0101:0101 |
| 255.255.255.0 | /24 subnet mask | ::ffff:ffff:ff00 |
| 224.0.0.1 | Multicast (all hosts) | ff02::1 (native IPv6 equivalent) |
Before working with IPv6 addresses, verify that your network supports them:
ipconfig /all | findstr "IPv6"ifconfig | grep inet6
# or
ip -6 addr showLog in to your router admin panel (usually at 192.168.1.1 or 10.0.0.1) and look for IPv6 settings under the WAN or Internet section. If you need help accessing your router, see our router login guide or look up your default router password. You can also use our What Is My IP tool to see if your connection already has an IPv6 address.
Yes, every valid IPv4 address can be represented in IPv6 format using the IPv4-mapped notation (::ffff:x.x.x.x). However, this doesn't mean the resulting address is routable on an IPv6 network — it's simply a representation format used in dual-stack environments.
In most cases, no. Operating systems and applications handle the conversion automatically when running dual-stack. However, understanding the conversion is valuable when configuring firewalls, writing ACLs, debugging network issues, or reading router logs that show IPv6-mapped addresses.
IPv4-mapped addresses use the ::ffff: prefix and are the current standard (RFC 4291). IPv4-compatible addresses use just :: and were deprecated because they created ambiguity with native IPv6 addresses. Always use the mapped format in new implementations.
Most modern routers support IPv6, but it may need to be enabled in the settings. Check your router's admin panel or consult our WiFi 6 guide — newer routers with WiFi 6 or WiFi 6E typically have full IPv6 support. You can also update your firmware to get the latest IPv6 features.
You cannot directly ping an IPv4-mapped IPv6 address from the command line in most operating systems. The mapped format is used internally by network stacks. To test connectivity, use the native IPv4 address with ping or the native IPv6 address with ping6. Try our Ping Test to check latency from your browser.
6to4 tunneling (RFC 3056) encapsulates IPv6 traffic within IPv4 packets using the 2002::/16 prefix. While it's still technically supported, most networks now use native IPv6 or Teredo tunneling instead. Major providers like Cloudflare and Google have deprecated 6to4 relay support.
About Tommy N.
Tommy is the founder of RouterHax and a network engineer with 10+ years of experience in home and enterprise networking. He specializes in router configuration, WiFi optimization, and network security. When not writing guides, he's testing the latest mesh WiFi systems and helping readers troubleshoot their home networks.
 |
 |
 |
 |
Promotion for FREE Gifts. Moreover, Free Items here. Disable Ad Blocker to get them all.
Once done, hit any button as below
|
|
|
|