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Fake IP Address Generator

Generate random, valid IPv4 or IPv6 addresses from any RFC range — public, RFC 1918 private, loopback, CGNAT, link-local, multicast, documentation or ULA. Optionally append a CIDR suffix and dedupe. Great for test data, mock configs and QA.

Input

Filtered against RFC ranges (RFC 1918, 6598, 5771, 5737, 3927, etc.)

Settings

Output

Generated Addresses
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Guides

The Fake IP Address Generator creates random, syntactically valid IP addresses on demand — either IPv4 (like 203.0.113.47) or IPv6 (like 2001:db8::1a2b). Every address is fabricated locally in your browser, so you get realistic-looking sample data without touching anyone's real network. Use it to seed databases, populate mock API responses, write test fixtures, redact logs, or fill out a form that demands an IP you'd rather not hand over.

How to use it

  1. Pick an IP Version — IPv4 or IPv6.
  2. Choose a Range Type. Each option maps to a real RFC allocation, so the generated address is guaranteed to fall inside (or outside) the block you expect.
  3. Set Count — from 1 up to 1000 addresses per run.
  4. Optionally tick Append CIDR suffix to get host notation (/32 for IPv4, /128 for IPv6), and Unique addresses to suppress duplicates.
  5. Click Generate. Copy the list or download it as a .txt file.

Which range should I choose?

  • Random (any valid) — anything across the whole address space, reserved or not.
  • Public (globally routable) — rejection-sampled to avoid every reserved block, so it looks like a real internet host.
  • Private (RFC 1918) — 10/8, 172.16/12, 192.168/16; the LAN ranges.
  • Loopback — 127.0.0.0/8 for IPv4, ::1 for IPv6.
  • CGNAT (RFC 6598) — 100.64.0.0/10, used by carrier-grade NAT.
  • Link-Local — 169.254.0.0/16 / fe80::/10.
  • Multicast — 224.0.0.0/4 / ff00::/8.
  • Documentation — 192.0.2.0/24, 198.51.100.0/24, 203.0.113.0/24 (RFC 5737) and 2001:db8::/32 (RFC 3849). These blocks exist specifically so examples never collide with a live host — the safest choice for tutorials and screenshots.
  • ULA (RFC 4193) — fc00::/7, the IPv6 equivalent of private space.

Are these addresses real or assigned to anyone?

They are randomly generated patterns, not lookups. A "public" address is merely globally routable in form — it may or may not be in use by a real host at any given moment, which is exactly why the Documentation ranges exist when you need addresses guaranteed never to belong to anyone.

Why did I get fewer addresses than I asked for?

Some ranges are tiny. IPv6 Loopback only contains ::1, so with Unique enabled you can only ever get one address; the tool tells you the range was exhausted rather than looping forever.

Is IPv6 output compressed?

Yes. Results follow RFC 5952 canonical form — leading zeros in each group are dropped and the longest run of zero groups collapses to ::.

Privacy

Everything runs entirely in your browser using JavaScript's random number generator. No address is sent to a server, logged, or stored, and nothing you generate leaves your device. Because the output is random, it is suitable for test and placeholder data — not as a proxy, anonymizer, or a way to disguise your real IP for network traffic.

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