{"@context":"https://schema.org","@type":"DefinedTerm","name":"ISO 6346 (container number)","description":"The shipping-container identification standard: 4 letters (owner code + equipment category) + 6 digits + 1 check digit. Letters map to values (A=10, skipping multiples of 11), each position is weighted 2^n, and the sum mod 11 gives the check digit (10 counts as 0). TrackJet validates this locally before any carrier lookup \u2014 a typo is caught instantly, often with a correction suggestion.","inDefinedTermSet":"https://trackjet.world/glossary"} Skip to content
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ISO 6346 (container number)

The shipping-container identification standard: 4 letters (owner code + equipment category) + 6 digits + 1 check digit. Letters map to values (A=10, skipping multiples of 11), each position is weighted 2^n, and the sum mod 11 gives the check digit (10 counts as 0). TrackJet validates this locally before any carrier lookup — a typo is caught instantly, often with a correction suggestion.

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