Use the SCF Check Digit Calculator to determine if your container number is correct. A container number will display as incorrect if you have the wrong check digit (last number). Insert the container number in the form below and click on CHECK.
What is a Shipping Container Check Digit?
All shipping containers used for rail & sea including specialised equipment must have a unique identification number. This number is calculated from:
The four letter prefix: The first three letters designate the owner, the fourth is always "U" identifying the unit as a container. e.g. SCFU - SCF Containers unit
The next 6 numbers: These numbers are decided by the owner according to their own numbering system. e.g. 205122
The last digit: Is called the check digit, this digit is usually outlined with a box.
You can use our calculator to work out what the check digit will be by adding the first 10 characters, or, if the check digit is valid.
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