National Identification Card Number generator (Taiwan)
A Taiwanese national ID number is one letter and nine digits — a region letter, a sex digit (1 or 2), a serial, and a weighted checksum digit. These test values are synthetic but checksum-valid.
Synthetic · not collision-guaranteed Validate a number →
Q159926746
Synthetic Taiwanese ID with a valid check digit. Not a real issued number.
Format specification
| Identifier | National Identification Card Number |
|---|---|
| Country | 🇹🇼 Taiwan |
| Format | A000000000 |
| Length | 10 characters |
| Checksum | Weighted MOD 10 |
| Example | S191363358 |
| Safe strategy | Synthetic |
| Data quality | Verified against sources |
National Identification Card Number: what each part means
| A | Region of first household registration (e.g. A = Taipei City); each letter maps to a two-digit value in the checksum. |
|---|---|
| 0 | Sex: 1 = male, 2 = female. |
| 0000000 | Seven-digit serial number. |
| 0 | Check digit: letter value (tens ×1, units ×9) plus the digits weighted 8 down to 1; the total must end in 0. |
Validation regex
Matches the canonical value — strip separators and uppercase first: value.replace(/[^A-Za-z0-9]/g, '').toUpperCase()
^[A-Z][12]\d{8}$ References
Common questions
Will these pass my validation?
Yes — they are well-formed National Identification Card Number values (A000000000) and pass standard format checks, including the Weighted MOD 10 checksum.
Could one belong to a real person?
These are synthetic values. They are format-valid but not drawn from a guaranteed reserved range, so use them only for testing.
Can I generate many at once?
Increase the count, or use the free API and CSV/JSON export for large datasets.
For software testing only. These numbers are synthetic and must never be used
for real-world identification, applications, or to impersonate anyone.