TW · TWN
Taiwan National ID Card Number format
Official and reviewed ID format references, with permanently masked examples for copy and QA. This site does not validate identity IDs.
Official public format
National ID Card Number
國民身分證統一編號
^[A-Z][12]\d{7}[0-9]$E273983*68
Regex and masked examples are reference only. This page does not validate identity IDs.
What the Taiwan ID reference covers
A Taiwan national ID number uses one letter followed by nine digits. The National Immigration Agency describes the same broad shape for newer foreign resident numbers, but they are different documents. This page covers the national ID format only.
The regex checks a visible character pattern; it does not check the official checksum, issuance or a person's identity. The displayed example always hides one character and must not be used to open a real account.
Data provenance
Sources
Data snapshot: 2026-09-21