Generate random IPv4 addresses (public, private, documentation or inside your own CIDR block), IPv6 addresses and random MAC addresses for testing.
Use generated addresses as test data only. Public addresses may belong to real networks; never use them to probe, scan or impersonate anyone.
Choose IPv4, IPv6 or MAC, pick a range, set how many you need (up to 5,000) and press Generate. Public (routable) only skips every special-purpose block: private networks, loopback, link-local, carrier-grade NAT, documentation, benchmarking, multicast and reserved space, plus addresses ending in .0 or .255. That makes the output realistic for log files, analytics fixtures, geo-IP tests and firewall-rule examples.
| Range | Block | Use it for |
|---|---|---|
| Private (RFC 1918) | 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16 | Home and office LANs, Docker and VPC examples |
| Documentation (RFC 5737) | 192.0.2.0/24, 198.51.100.0/24, 203.0.113.0/24 | Docs, tutorials and screenshots: never routed |
| Loopback | 127.0.0.0/8 | Local services |
| Carrier-grade NAT | 100.64.0.0/10 | ISP NAT test cases |
| Custom CIDR | for example 10.20.0.0/16 | Random hosts inside your own subnet |
With a custom CIDR the generator normalises the network address, skips the network and broadcast addresses for blocks larger than /31, and tells you how many usable hosts there are. Tick Add a port for ip:port pairs such as 198.51.100.23:50412.
IPv6 mode produces global unicast addresses from 2000::/3, documentation addresses in 2001:db8::/32 (the safe choice for examples), unique local addresses in fd00::/8 and link-local fe80:: addresses, in full eight-group form or compressed with :: following RFC 5952.
Choose MAC addresses for 48-bit hardware addresses in colon, dash, Cisco dotted or plain format. Locally administered unicast sets the second-least-significant bit of the first byte and clears the multicast bit, so the address can never clash with a manufacturer-assigned one: the right choice for virtual machines, containers and MAC spoofing tests. Real vendor prefix uses a genuine OUI from Apple, Cisco, Intel, Raspberry Pi, VMware, VirtualBox, QEMU/KVM and others and shows the vendor, useful for testing device-detection logic.
02:4F:A1:7C:3B:90 (locally administered)
b827.eb1c.93fa (Cisco format, Raspberry Pi OUI)
00:50:56:3A:C1:7E (VMware)They are valid, correctly formatted addresses. Public ones may belong to real networks, so use them only as test data and never to scan or attack anyone. For docs and screenshots choose Documentation (RFC 5737) or 2001:db8:: for IPv6, which are never routed.
Yes. Choose Custom CIDR block and enter a block such as 10.20.0.0/16 or 192.168.1.0/24. Network and broadcast addresses are skipped for blocks larger than /31.
Choose Private for a mix of 10/8, 172.16/12 and 192.168/16, or pick one of the three blocks on its own.
A MAC address whose first byte has the local bit set, such as 02:xx or x6:xx. It cannot clash with a manufacturer-assigned address, which is why VMs and privacy features use it.
Yes: global unicast, documentation (2001:db8::/32), unique local (fd00::/8) and link-local (fe80::), in full or compressed notation.
Up to 5,000 per click, unique by default, with optional ports and sorting, as a text file or CSV.
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