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IPv4 to IPv6

Convert IPv4 addresses to IPv6 addresses. Supports IPv4-mapped and IPv4-compatible formats.

Number each conversion result

Display original IPv4 addresses in results

Key Facts

Category
Network
Input Types
textarea, select, checkbox
Output Type
text
Sample Coverage
4
API Ready
Yes

Overview

The IPv4 to IPv6 converter is a specialized network utility designed to translate standard 32-bit IPv4 addresses into their 128-bit IPv6 equivalents. It supports multiple industry-standard transition formats, including IPv4-mapped, IPv4-compatible, and NAT64, ensuring seamless compatibility for network configuration and migration tasks.

When to Use

  • •When migrating network infrastructure from legacy IPv4 to modern IPv6 environments.
  • •When configuring dual-stack network devices that require specific address mapping formats.
  • •When generating NAT64 prefixes for translation services in isolated IPv6-only networks.

How It Works

  • •Enter your IPv4 addresses into the input field, placing each address on a new line.
  • •Select your preferred output format, such as IPv4-mapped or NAT64, from the dropdown menu.
  • •Toggle optional settings like line numbering or source data display to customize your output.
  • •Click the convert button to generate the formatted IPv6 addresses instantly.

Use Cases

Network administrators preparing firewall rules for dual-stack transitions.
Developers testing application compatibility in IPv6-only network environments.
System engineers mapping legacy server IPs into modern cloud-native network configurations.

Examples

1. Dual-Stack Infrastructure Mapping

Network Engineer
Background
An engineer is updating a server configuration to support dual-stack connectivity.
Problem
Need to generate IPv4-mapped addresses for a list of existing server IPs to ensure compatibility with IPv6-only internal traffic.
How to Use
Paste the server IP list, select 'IPv4-Mapped' format, and enable 'Show Source Data' for verification.
Example Config
format: mapped, showSourceData: true
Outcome
A clean list showing the original IPv4 address alongside its corresponding IPv6-mapped representation.

2. NAT64 Configuration Setup

Cloud Architect
Background
The team is deploying an IPv6-only cluster that needs to reach external IPv4 services.
Problem
Required to translate a set of external service IPs into the NAT64 format to route traffic through the gateway.
How to Use
Input the external service IPs and select the 'NAT64' output format.
Example Config
format: nat64, addLineNumbers: true
Outcome
A numbered list of NAT64-compliant addresses ready to be imported into the gateway routing table.

Try with Samples

network
IP Address Samples
Collection of IPv4 and IPv6 addresses in various formats for validation testing
task format
sample
Hex/Unicode Encoding Format Samples
Examples of hex (\xXX) and unicode (\uXXXX) escape sequence encoding formats
task convert,format
sample
Text Case Format Samples
Examples of different text case formats: camelCase, snake_case, kebab-case, PascalCase, and more
task convert,format
sample
MAC Address Samples
Collection of MAC addresses in various formats for validation testing
task format
sample

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FAQ

What is an IPv4-mapped address?

An IPv4-mapped address is an IPv6 address that represents an IPv4 node, typically using the prefix ::ffff:0:0/96.

Can I convert multiple IP addresses at once?

Yes, you can paste a list of IPv4 addresses into the input area, and the tool will process them line by line.

What is the difference between mapped and compatible formats?

Mapped addresses (::ffff:0:0/96) are used for dual-stack nodes, while compatible addresses (::/96) are a legacy format for tunneling IPv4 over IPv6.

Does this tool support NAT64 prefix generation?

Yes, selecting the NAT64 format will apply the well-known 64:ff9b::/96 prefix to your provided IPv4 addresses.

Is my data sent to a server?

The conversion is performed efficiently, and no IP address data is stored or logged by the tool.

API Documentation

Request Endpoint

POST /en/api/tools/ipv4-to-ipv6

Request Parameters

Parameter Name Type Required Description
ipv4Input textarea Yes -
format select Yes -
addLineNumbers checkbox No Number each conversion result
showSourceData checkbox No Display original IPv4 addresses in results

Response Format

{
  "result": "Processed text content",
  "error": "Error message (optional)",
  "message": "Notification message (optional)",
  "metadata": {
    "key": "value"
  }
}
Text: Text

AI MCP Documentation

Add this tool to your MCP server configuration: 

{
  "mcpServers": {
    "elysiatools-ipv4-to-ipv6": {
      "name": "ipv4-to-ipv6",
      "description": "Convert IPv4 addresses to IPv6 addresses. Supports IPv4-mapped and IPv4-compatible formats.",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=ipv4-to-ipv6",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

You can chain multiple tools, e.g.: `https://elysiatools.com/mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp`, max 20 tools.

If you encounter any issues, please contact us at [email protected]