Container Prefix Directory

CAIU Container Prefix Owner

CAIU is a container owner code associated with CAI International. Learn how BIC container prefixes identify equipment owners and operators.

Prefix: CAIU
Owner or operator: CAI International

The four-letter prefix CAIU appears at the start of ISO container identification numbers and is associated with CAI International.

A complete container number combines the owner prefix, six-digit serial number, and check digit. The prefix identifies registered equipment ownership and does not always identify the carrier currently transporting the container.

Use the CargoEnter container validator to check the number structure before starting shipment tracking.

CAIU container number format

A container number starting with CAIU has the four-letter prefix, a six-digit serial number, and one check digit, for example CAIU1234567.

Who uses CAIU containers

CAIU is registered to CAI International. Leased or exchanged equipment can move with a different shipping line, so the prefix alone does not identify the carrier of a shipment.

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CAIU Container Tracking – CAI International

Frequently asked questions

Who owns CAIU containers?

The CAIU prefix is associated with CAI International.

Does the CAIU prefix tell me the shipping line?

Not always. The prefix identifies the equipment owner. A leased or exchanged container can travel with a different carrier.