Random IP Address Generator
Generate random IPv4 and IPv6 addresses for testing, development, and education
Generation Settings
About IP Address Ranges
Public IP Addresses
Public IP addresses are globally routable and used to identify devices on the internet. They are assigned by Internet Service Providers (ISPs) and managed by regional registries (ARIN, RIPE, APNIC, etc.). Most IPv4 addresses in the range 1.0.0.0 through 223.255.255.255 are public, excluding the private and reserved blocks listed below.
Private IP Ranges
Private addresses are reserved by RFC 1918 for use within local area networks (LANs). They are not routable on the public internet and can be freely reused across different networks.
- 10.0.0.0/8 — 16.7 million addresses (Class A private)
- 172.16.0.0/12 — 1 million addresses (Class B private)
- 192.168.0.0/16 — 65,536 addresses (Class C private)
Reserved IP Ranges
Reserved addresses serve special purposes and should not be used for general host addressing.
- 0.0.0.0/8 — "This network" (used for default routes)
- 127.0.0.0/8 — Loopback (localhost)
- 169.254.0.0/16 — Link-local (APIPA, auto-assigned when no DHCP)
- 224.0.0.0/4 — Multicast
- 240.0.0.0/4 — Reserved for future use / experimental
IPv6 Addresses
IPv6 uses 128-bit addresses written as eight groups of four hexadecimal digits separated by colons (e.g., 2001:0db8:85a3:0000:0000:8a2e:0370:7334). With 3.4 × 1038 possible addresses, IPv6 eliminates the address scarcity problem of IPv4. Notable ranges include ::1 (loopback), fe80::/10 (link-local), and fc00::/7 (unique local addresses).
Frequently Asked Questions
What is a random IP address generator used for?
Random IP generators are commonly used in software testing to simulate network traffic, populate test databases with realistic data, test firewall rules and access control lists, and for educational purposes when learning about IP addressing and subnetting. They produce syntactically valid addresses without targeting real devices.
Are randomly generated IP addresses real?
Generated addresses follow the correct format (four octets for IPv4, eight hex groups for IPv6) but are not guaranteed to be assigned to any real device. Some may correspond to active hosts, while others may be unallocated. With the "exclude private" and "exclude reserved" filters enabled, the generator only produces addresses in publicly routable ranges.
What is the difference between private and public IP ranges?
Private IP ranges (10.x.x.x, 172.16-31.x.x, 192.168.x.x) are reserved for local networks and cannot be routed on the public internet. Public IPs are globally unique addresses assigned by ISPs for internet-facing devices. Reserved ranges like 127.x.x.x (loopback) and 224-255.x.x.x (multicast/experimental) serve special purposes.
How many possible IPv4 and IPv6 addresses exist?
IPv4's 32-bit address space provides approximately 4.3 billion unique addresses, many of which are already exhausted. IPv6's 128-bit space provides roughly 340 undecillion (3.4 × 1038) addresses — enough to assign a unique address to every grain of sand on Earth many times over. This massive expansion was the primary motivation for developing IPv6.
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