Test Postal Code Generator — Dummy ZIP / Postcodes for Fixtures
Generate prefix-valid postal codes for checkout tax, shipping zones, and regex fixtures. Codes may be assigned; use only in non-production. Not for mail, geo-restriction bypass, or DPV certification.
How generation works
Pick a quantity (1–100), country, region, format, and (for US) sales-tax mode. Changing an option refreshes the list immediately. Copy all (postal codes) or download JSON, CSV, SQL, or TXT.
Options
- Quantity (1–100)
- How many unique postal codes to emit for seed jobs. Capped at 100.
- Country
- Selects format mask and prefix alphabet. US ZIP, CA A#A #A#, GB outward/inward, FR five-digit CP, DE PLZ, SE ### ##, AU four-digit postcode.
- Region
- Constrains the prefix pool (US state, CA province, GB area, FR department, DE/SE zone digit, AU state). any samples uniformly across regions.
- Format
- national keeps display separators; compact strips them on CA, GB, and SE; zipPlus4 is US-only #####-#### with add-on 0001–9999.
- US sales tax
- Shown only when country is US. noStateSalesTax limits prefixes to Alaska, Delaware, Montana, New Hampshire, and Oregon.
Examples
US checkout ZIP
Settings
Sample output
GB compact postcode
Settings
Sample output
Related tools
Need a full street line? Try the test address generator. Pair with company, username, name, email, or phone columns? Try the test company name generator, test username generator, test name generator, test email generator, or test phone number generator. Also: UUID generator or Lorem Ipsum generator.
Test postal code FAQ
Fixtures, honesty, and what this tool is not
Can these postal codes be real assigned codes?
Yes. Prefix-valid generation often matches assigned postcodes. Use them only as synthetic fixtures in non-production. This tool does not check PAF, CASS, DPV, or registry membership.
Is this a fake address or fake ZIP generator?
If you searched for a fake zip code generator, this page emits one-column postal_code strings for fixtures — not a full address, city line, or identity pack.
Does it output street, city, or lat/long?
No. This page generates postal codes only. For street, city, and unit, use the test address generator — it imports this postal engine. This page still does not emit lat/long.
Are 00000 or reserved test ZIPs used?
No. The engine never emits all-zero codes and does not claim USPS, Royal Mail, or La Poste reserved fiction blocks.
Test Data
Synthetic field values for fixtures and DB seed — reserved-range phone numbers first.
- Test Name Generator
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- CSV Test Data Generator
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- Test Credit Card Generator
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