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About

Software developers and QA engineers often require robust datasets to test input fields, database schemas, and user interfaces. Using real phone numbers for testing is a privacy risk and violates GDPR/CCPA compliance. This Phone Number Generator creates syntactically valid but fictitious telephone numbers tailored for specific countries.

The tool utilizes International Telecommunication Union (ITU) standards, specifically the E.164 recommendation, to ensure that generated numbers pass strict regex validation rules in your applications. Where available, it prioritizes "reserved" ranges (like 555 in the US or 0700 900 in the UK) designated specifically for drama, documentation, and testing, ensuring you never accidentally harass real subscribers.

qa testing form validation e164 format

Formulas

The generator follows a step-by-step algorithmic approach to construct validity:

  • Step 1: Selection. The system retrieves the Country Dialing Code (e.g., +44) and the National Destination Code (NDC) pattern.
  • Step 2: Range Safety. If a country has a designated 'Drama/Test' range (e.g., UK Ofcom's 07700 900000 - 07700 900999), the generator locks the prefix to these digits.
  • Step 3: Randomization. Remaining 'x' placeholders are replaced with pseudorandom integers (0-9).
  • Step 4: E.164 Formatting. Non-numeric characters (parentheses, spaces, hyphens) are stripped or applied based on the user's output preference.

E.164 Structure: [+] [Country Code] [Subscriber Number including Area Code]

Reference Data

CountryISO CodeDial CodeMobile Format (Pattern)
United StatesUS+1(555) 01x-xxxx
United KingdomGB+447700 900xxx
GermanyDE+49151 23xxxxxx
FranceFR+336 12 xx xx xx
AustraliaAU+61491 570 xxx
JapanJP+8190-xxxx-xxxx
BrazilBR+55(11) 9xxxx-xxxx
IndiaIN+919xxx xxxxxx
ChinaCN+861xx xxxx xxxx
RussiaRU+7(9xx) xxx-xx-xx

Frequently Asked Questions

No. These numbers are syntactically correct (they look real to a computer) but they are mathematically generated within unassigned or reserved ranges. They do not connect to a SIM card or carrier network.
Ensure your validation logic accounts for International prefixes (+). Some 'Local' formats include leading zeros (like '0' in the UK or Australia) which are dropped in the strict E.164 format. Use the 'Format' toggle in the tool to switch between international and local display.
Yes, for testing purposes. They are designed to avoid conflicts with real users. However, you should never use them to register for third-party services as you cannot verify ownership.
E.164 is the international telephone numbering plan that ensures each device on the PSTN network has a globally unique identifier. It limits numbers to a maximum of 15 digits.