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Test phone number generator

Format-valid sample numbers for fixtures, demos, and form-validation tests, drawn from regulator-reserved fiction ranges wherever one exists.

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Reviewed by Sujan ThapaliyaLast updated

Generate test numbers

Format-valid numbers for seeding fixtures, demos, and form-validation tests. Where a regulator publishes a reserved fiction range, the generator uses it.

What number should you use for testing?

Use a range the regulator has reserved for fiction. In North America that is 555-0100 to 555-0199; in the UK, Ofcom reserves 020 7946 0XXX and 07700 900XXX; in Australia, ACMA reserves ranges including 04 9157 0XXX. These are permanently unassigned, so a test that accidentally dials one cannot reach a real person.
Why a test number still has to be structurally valid: it occupies the same E.164 positions as a real one, with country code, national destination code, and subscriber number, and must respect the fifteen-digit ceiling. What makes it safe for testing is that the range it sits in is reserved for fiction, not that it is malformed.
Every tool here reads and writes the same structure: country code, national destination code, subscriber number.

Step by step

How to use the test number generator

  1. 1

    Choose a country and number type

    Test numbers are drawn from ranges regulators reserve for drama and documentation, so they are guaranteed never to reach a real subscriber.
  2. 2

    Generate as many as you need

    Use them for seeding fixtures, filling staging databases, and screenshotting a UI without exposing anyone's real number.
  3. 3

    Never use a real-looking number instead

    Inventing a plausible number rather than using a reserved one is how test suites end up dialling a stranger, and how screenshots end up publishing a customer's phone number.

How it works

Why a made-up number is not a safe test number

A phone number that looks fictional usually is not. Type nine plausible digits and there is a good chance you have written someone’s actual mobile number, and test suites run on schedules, so a mistake here does not fail once, it fails repeatedly at 3am for as long as nobody notices.

Regulators solved this by carving out permanently unassignable ranges. Nothing in them can ever be issued to a subscriber, which is exactly the property a test fixture needs.

Where a country publishes no reserved range, this tool generates a number matching the national format and says so plainly. Treat those as string fixtures for validation tests, never as a destination for an outbound call or message.

If what you actually need is a working number you control (for testing a call flow end to end, or for keeping your personal number private), get a real one. A virtual number costs a little each month, receives calls and texts properly, and is yours.

Frequently asked questions

Are these real phone numbers?
For the United States, Canada, the UK, and Australia, no: the generator draws from ranges the regulator has reserved for fiction and testing, which are permanently unassigned. For other countries no such range is published, so the output is format-valid but not guaranteed unassigned. Use those for fixtures only; never dial them.
What are the 555 numbers?
In the North American Numbering Plan, 555-0100 through 555-0199 is reserved for fictional use. That is why films and television use them: they are permanently unassignable, so a memorable number in a film cannot start ringing in someone's house.
Can I use these to sign up for a service or receive a verification code?
No. These numbers cannot receive calls or texts; nothing is connected to them, by design. If you need a real number that you control, get one properly: it costs little, it works, and it is yours.
What should I use for automated test suites?
The reserved ranges, always. Hard-coding a plausible-looking number that turns out to belong to a real person is a genuine and recurring incident: test suites have been known to send real texts and place real calls to strangers for months before anyone noticed.

Sources

  1. ITU-T Recommendation E.164 — The international public telecommunication numbering plan — International Telecommunication UnionThe international number format, the 15-digit maximum, and how country codes and national numbers compose.
  2. ITU-T International Numbering Resources — International Telecommunication UnionThe assignment of country calling codes and the published national numbering plans they belong to.

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