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▶ Developer Tools for Random Data Generation // v2.1.2
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Random IP Address Generator

Generate random IPv4 and IPv6 addresses for testing and development

Our random IP address generator helps you generate random IP addresses for testing and development. Generate-Random.org provides a free IP generator that creates IPv4 and IPv6 addresses with customizable options. This CSPRNG IP generator uses cryptographically secure random number generation for maximum security. Generate up to 100 IP addresses with options for private IPs, localhost, and bulk export. Perfect for network testing, software development, and security research. All IP addresses generated with cryptographic-quality randomness. No signup required, completely free.

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What is an IP Address Generator?

An IP Address Generator creates random IPv4 and IPv6 addresses for testing, development, and educational purposes. Our generator uses cryptographically secure algorithms to ensure truly random IP addresses that can be used for network simulations, software testing, and learning.

IP addresses are essential in networking, identifying devices on local and global networks. IPv4 uses 32-bit addresses (e.g., 192.168.1.1) while IPv6 uses 128-bit addresses (e.g., 2001:0db8:85a3::8a2e:0370:7334). For other test data needs, try our string generator or number generator.

IP Address Generator Configuration Options

IP Version Selection (IPv4 / IPv6 / Both)

Choose between IPv4, IPv6, or generate both types of IP addresses. IPv4: Traditional 32-bit addresses in dotted-decimal notation (e.g., 192.168.0.1), widely used for most networks. IPv6: Modern 128-bit addresses in hexadecimal notation (e.g., 2001:db8::1), designed to solve IPv4 address exhaustion. Both: Randomly mix IPv4 and IPv6 addresses in your results for comprehensive testing scenarios.

Quantity (1-100 IP Addresses)

Generate multiple IP addresses simultaneously for batch operations, network simulations, or bulk testing needs. Each IP address is independently generated with cryptographically secure randomness, ensuring no patterns or correlations between addresses. Generate 1-100 IP addresses in a single operation with efficient batch processing.

Private IP Addresses Option

Enable or disable generation of private IP addresses. When disabled, the generator avoids RFC 1918 private ranges: 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16 for IPv4. This ensures only publicly routable IP addresses are generated, ideal for simulating internet-facing services and public network scenarios.

Localhost Addresses Option

Control whether localhost/loopback addresses (127.0.0.0/8 for IPv4, ::1 for IPv6) are included in results. Disable this when generating IP addresses for network communication testing, as localhost addresses cannot be used for actual network traffic between different machines.

How to Generate Random IP Addresses

[STEP 1] Select IP Version

Choose IPv4 for traditional addresses, IPv6 for modern addresses, or Both for mixed results.

[STEP 1] Set Quantity

Specify how many IP addresses to generate (1-100).

[STEP 1] Configure Options

Enable or disable private IPs and localhost addresses based on your testing needs.

[STEP 1] Generate & Export

Click generate and export results in TXT, CSV, or JSON format for your projects.

Common Use Cases for Random IP Addresses

  • _ Network Testing: Test firewall rules, routing configurations, and network access controls with diverse IP addresses
  • _ Software Development: Populate test databases, simulate user traffic, and test IP-based features in applications
  • _ Security Research: Generate test data for penetration testing, vulnerability scanners, and security tools
  • _ Education & Training: Create realistic network scenarios for teaching networking concepts and protocols
  • _ Log Analysis: Generate sample log entries with varied IP addresses for testing log parsers and SIEM systems
  • _ API Testing: Test geolocation APIs, IP-based rate limiting, and access control systems

Technical Details: IP Address Generation Algorithm

Our IP address generator employs cryptographically secure random number generation (CSPRNG) to create valid IPv4 and IPv6 addresses. The system validates address ranges, excludes reserved blocks when configured, and ensures proper formatting for both address types. All addresses are generated with statistical randomness that passes rigorous entropy tests.

// IPv4 Generation (32-bit)
IPv4 = a.b.c.d where each octet ∈ [0, 255]
- Avoid reserved: 0.0.0.0/8, 127.0.0.0/8, 224.0.0.0/4, 255.255.255.255
- Optional: Exclude private (RFC 1918)
  10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16

// IPv6 Generation (128-bit)
IPv6 = xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx
- Each segment: 4 hexadecimal digits
- Optional compression: Replace consecutive zeros with ::
- Avoid reserved: ::/128, ::1/128, fe80::/10

// Random Address Generation
1. Generate cryptographically secure random bytes
2. Apply address format (dotted-decimal or hex)
3. Validate against reserved/private ranges
4. Regenerate if constraints violated
5. Return formatted address

Security: All randomness from CSPRNG (NIST SP 800-90A)
Validation: RFC 791 (IPv4), RFC 4291 (IPv6)

API Access for Developers

GET https://generate-random.org/api/v1/generate/ip-addresses
VIEW FULL API DOCUMENTATION →

Frequently Asked Questions

What's the difference between IPv4 and IPv6? ▶
IPv4 uses 32-bit addresses (4 octets) in format like 192.168.1.1, providing about 4.3 billion unique addresses. IPv6 uses 128-bit addresses in hexadecimal format like 2001:db8::1, providing an essentially unlimited address space. IPv6 was created to solve IPv4 address exhaustion.
What are private IP addresses? ▶
Private IP addresses are reserved for use within private networks and cannot be routed on the public internet. RFC 1918 defines these ranges: 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16 for IPv4. These are commonly used in home and corporate networks with NAT.
Can I use these IP addresses in production? ▶
These randomly generated IP addresses are for testing and development purposes only. Do not use them for actual network configuration without proper planning and authorization. For production systems, obtain IP addresses through proper channels (ISPs, RIRs, or private network planning).
Why would I exclude localhost addresses? ▶
Localhost addresses (127.0.0.0/8 for IPv4, ::1 for IPv6) only work for local machine communication and cannot be used for network traffic between different devices. Excluding them ensures your test data represents realistic network scenarios.
How are IPv6 addresses compressed? ▶
IPv6 allows compression by replacing the longest sequence of consecutive zero groups with '::'. For example, 2001:0db8:0000:0000:0000:0000:0000:0001 becomes 2001:db8::1. Our generator randomly applies compression to create realistic-looking addresses.