Methodology & Coverage
Data and Testing Methodology
Global Address Generator is designed to provide structured synthetic examples for development, prototyping, and quality assurance. It does not attempt to identify a real residence. This report explains where format rules come from, how samples and test cases are assembled, what is checked before release, and why generated output cannot replace postal validation.
Current coverage
| Component | Current coverage | Purpose |
|---|---|---|
| Generator regions | United States, Japan, United Kingdom, Korea, selected EU countries, selected Southeast Asian countries | Produce localized field order, name, phone, and postal-code examples |
| QA region labels | US, Japan, UK, Korea, EU, Southeast Asia, global | Filter cases relevant to a target market |
| Editorial QA cases | 24 cases | Cover leading zeros, Unicode, optional fields, country switching, data exchange, mobile layout, and accessibility |
| Reproducibility | Country + scenario + count + seed | Restore the same ordered suite in a bug report or regression run |
| Report formats | CSV, JSON, plain text | Preserve expected results, execution status, and failure notes |
How a sample address is generated
- Select regional data. Each tool draws from maintained city, administrative-area, street-type, postal-pattern, local-name, and phone-format data.
- Apply a country-specific structure. The tools define field order separately instead of applying the US city-state-ZIP model to every country.
- Process locally. Random selection, copying, and report export run in the browser. The site does not receive addresses or failure notes entered by a visitor.
- Preserve the synthetic boundary. A sample can use a real city or a valid postal-code shape, but the combined street, number, name, and phone are not claimed to belong to a resident.
How QA cases differ from random samples
The QA Lab does not merely draw several entries from an address list. Every case has an editorially assigned ID, input, action, expected result, failure risk, and priority. For example, US-POSTAL-01 checks whether ZIP Code 02108 retains its leading zero after page, API, database, and CSV round trips. JP-UNICODE-01 checks whether Japanese text survives create, edit, search, and export operations unchanged.
A seed determines only the order of matching cases. It does not invent an expected result. Reusing the same country, scenario, count, and seed produces the same ordered suite, so a team can reference it in a defect and run it again after a fix.
Pre-publication review
| Review layer | What is checked | What it cannot establish |
|---|---|---|
| Structure | Field names, order, administrative levels, postal-code shape | That a specific premise exists |
| Software | Filters, seeded order, copy, CSV/JSON output, mobile layout | Acceptance by every checkout or CRM |
| Safety | Synthetic-data purpose and prohibited-use boundaries | Identity, tax, fraud, or delivery validity |
| Sources | Primary postal authorities and UPU material where available | Endorsement or certification by those organizations |
Primary references
- USPS Publication 28: Postal Addressing Standards, used for US delivery lines, last lines, PO Boxes, and secondary-unit conventions.
- Universal Postal Union Addressing Solutions, used as a cross-country entry point for address elements and postcode structures.
- Japan Post: How to Write the Address and Name, used for international Roman-alphabet line-order examples.
Sources are used to verify rules, not copied as site content. For a real shipment, users should recheck the destination postal operator and use an authorized address-validation service.
Known limitations and update triggers
- The EU and Southeast Asia do not have single address formats; aggregate tools cover only the countries listed on their pages.
- A correctly shaped postcode does not prove that it matches the generated street and city.
- Phone numbers are UI samples and must not be called, messaged, or used for account verification.
- A new postal rule, a reproducible user report, or a failed tool test triggers an earlier review of the affected page.
Evidence level: this site can help answer “can the software handle this address shape?” It cannot answer “is this a real, deliverable address belonging to a person?”
Read the editorial policy, browse the guide library, or use the Address QA Lab.