AWB check digit — validate an air waybill number
An air waybill number has 11 digits: a 3-digit IATA airline prefix and an 8-digit serial whose last digit is a check digit. The check digit is the 7-digit serial modulo 7. Type a number and see the arithmetic.
Try it — live validator
Runs the same algorithm TrackJet’s detector uses, locally in your browser. Zero network calls.
The rule
serial (7 digits) mod 7 = check digit. Example: 020-12345675 → 1234567 mod 7 = 5 ✓. The prefix identifies the airline (020 = Lufthansa Cargo); TrackJet resolves it to the airline page.