Random Address & Test Data Generator

What this tool is for

Realistic test data is harder to come by than it looks. Copying a colleague's address into a fixture puts real personal data in your repository. Typing "123 Test Street" into every record means your layout never meets a long street name, your validator never meets a leading zero, and your database never meets a character outside ASCII.

This generator produces addresses that are structurally correct for the country you pick — the right postal code shape, the right phone number pattern, the right national ID format, the right ordering of address lines — while describing nobody. That combination is what makes it useful for seeding a development database, filling a staging environment, exercising a checkout form, or producing screenshots that do not leak a real customer.

Nothing here can point at a real person

Plenty of generators produce plausible-looking data and leave it at that. The problem with plausible data is that it can accidentally be real — a randomly generated phone number rings somebody, a randomly generated IP address belongs to somebody's server.

So wherever a regulator has set aside a range specifically so that it can never be assigned, this tool uses it. Every US number comes from the 555-0100 block the NANP reserves for fiction. Every UK number comes from Ofcom's 07700 900000 drama range, and every Australian one from ACMA's 0491 570 block. Every IP address comes from the RFC 5737 documentation networks, which are guaranteed never to be routed. Every MAC address has the locally-administered bit set, so it cannot collide with real hardware.

The same principle covers identity numbers where an unassignable range exists. US Social Security Numbers use the 666 area group, which has never been issued and never will be. UK National Insurance numbers use only the prefixes HMRC has never allocated. Each still passes a format check — which is the entire point when you are testing a form — while being impossible to trace to a person.

What it deliberately will not do

The addresses are not deliverable. Street names, cities and regions come from real geography so the output reads correctly and the fields agree with each other, but house numbers are random and no address was looked up against a postal database. If you post a letter to one, it will not arrive.

There is no payment card generation, and there will not be. There is no attempt to make output resolve against real postal, telephone or government systems. Those things would make the data more convincing without making it more useful for testing, and considerably more useful for things this tool has no interest in supporting.

Country guides

Twenty countries have a written guide explaining how their addressing, numbering and identity formats work. The generator supports 57 in total.