Sample IP Addresses for Testing and Mock Data
Two independent generators, one for IPv4 and one for IPv6, each producing a fresh address with a click. Useful for populating test databases, verifying that firewall or validation rules handle addresses correctly, or filling in sample data that needs to look like a real network address without being one.
IPv4 addresses exclude private and reserved ranges — no 10.x.x.x, 127.x.x.x, 192.168.x.x, link-local, multicast, or documentation-only blocks — so what you get looks like a genuine public-facing address, not an obviously fake or internal one.
What ranges does the IPv4 generator avoid?
Every address is checked against the standard reserved blocks before it's shown: the private ranges (10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16), loopback (127.0.0.0/8), link-local (169.254.0.0/16), carrier-grade NAT (100.64.0.0/10), multicast and reserved space (224.0.0.0/4 and above), and the ranges set aside for documentation and benchmarking. If a randomly generated address falls into any of those, it's discarded and another is generated in its place — so what's shown is always in the routable, public address space.
What's the difference between IPv4 and IPv6?
IPv4 addresses are four numbers from 0-255 separated by dots (like 192.0.2.1), giving roughly 4.3 billion possible addresses — a pool the internet has effectively exhausted. IPv6 uses eight groups of four hexadecimal digits separated by colons (like 2001:0db8:85a3:0000:0000:8a2e:0370:7334) and provides a vastly larger address space. Both are still in active use, so this tool generates valid examples of each for testing systems that need to handle either format.
Why would I need a fake IP address?
Mostly for testing. QA engineers use them to populate mock records, developers use them to verify that IP-based validation or geolocation logic behaves correctly, and network professionals use them to test firewall and routing rules without touching a real address. Pair this with the random number generator when a test record also needs other numeric fields filled in.
Can these addresses be used maliciously?
Not meaningfully. These are randomly generated values, not addresses assigned to any real device, and excluding private ranges just makes them look realistic for testing — it doesn't grant access to anything. They're for populating test data and verifying code handles IP addresses correctly, nothing more.
Related tools
- Random Number Generator — for filling in other numeric fields in test records.
- UUID Generator — for generating unique record identifiers alongside sample IPs.
- Random Date Generator — for filling in timestamp fields in the same test records.
Last reviewed: August 2026