ID document lookup
Handy lookup tools and small reference tables, plus lightweight health/reaction calculators.
Tip: ID numbers
Mainland IDs encode region and checksum; HK/Macao/TW have separate rules. This tool validates format only—not official identity verification.
Notes
Mainland 18-digit resident ID: digits 1–6 are the administrative division (registered region), 7–14 are date of birth, digit 17 odd = male / even = female, last digit is a checksum. Parsing runs locally in your browser; numbers are not uploaded.
Hong Kong ID: format and check digit can be validated. Permanent vs non-permanent status and issue date are printed on the card and cannot be inferred reliably from the number alone.
Avoid entering real ID numbers on shared devices. Results are informational only and not legal proof.