Free GST Number Verifier — Validate Any GSTIN

Enter a 15-character GSTIN to check its structure and checksum, and to read off the state, PAN and entity code it encodes. Free, instant, no signup.

Result for 27AAPFU0939F1ZV

✓ Checksum valid — well-formed GSTIN

Structural + checksum validation only. To confirm a GSTIN is live and registered, use the official GST portal.

A GSTIN (Goods & Services Tax Identification Number) is a 15-character code derived from your PAN:

Digits 1–2 — state code.
Characters 3–12 — the 10-character PAN of the business.
Character 13 — entity number (how many registrations the PAN holds in that state).
Character 14 — normally the letter ‘Z’.
Character 15 — a checksum digit that this tool re-computes to flag typos.