Random IP Address Generator (Developer)

How to use

1. 1️⃣
   Choose your options above
2. 2️⃣
   Click Generate
3. 3️⃣
   Copy your result

Detailed instructions

1. Set the Count field to the number of IP addresses you need for your test batch.
2. Select 'IPv4' or 'IPv6' from the IP Version dropdown depending on your protocol requirements.
3. Check 'Public IPs only' if your test requires globally routable addresses without private ranges.
4. Click Generate to produce the list, then copy all addresses with the copy button.
5. Paste the addresses into your test fixture file, seed script, or log simulator.

Use Cases

• •Seed synthetic Nginx access logs with varied public IPs to test log-parsing pipelines
• •Populate a Postgres staging table with 500 diverse IPv4 addresses for load testing a rate-limiter
• •Validate that a Node.js geo-IP middleware handles both IPv4 and IPv6 inputs without throwing
• •Generate a batch of globally routable IPs to test firewall allowlist and blocklist rule evaluation
• •Create a Jest fixture file of mixed IPv4 and IPv6 addresses to cover dual-stack parser edge cases

Tips

• →Generate a mix of IPv4 and IPv6 by running two separate batches and combining them — this stress-tests dual-stack parsing code.
• →For rate-limiter testing, generate at least 20-50 unique IPs so your middleware doesn't hit per-IP thresholds prematurely during tests.
• →When testing geo-IP services, use public IPs only — private ranges like 192.168.x.x will return null or error results from most geo-lookup APIs.
• →Save generated batches as static fixture files in your repo rather than regenerating at test runtime — keeps tests deterministic and fast.
• →To test edge cases, leave 'Public IPs only' off so you get private and loopback addresses, then verify your parser handles them gracefully.
• →If your application stores IPs in a database, generate addresses that include both short and long strings (IPv4 vs IPv6) to catch column-length bugs early.

FAQ