Container Providers International (CPI) Container Number Format & Prefixes
Every Container Providers International (CPI) container is registered under the international ISO 6346 standard. A valid number always consists of an 11-character alphanumeric code structured as follows:
4 Letters (Owner Prefix) + 6 Digits (Serial Number) + 1 Check Digit
Common container prefixes assigned to Container Providers International (CPI) include:
Common entry errors to avoid:
- Do not confuse the letter O with the number 0. Container prefixes only use letters; serial numbers use digits.
- Do not confuse uppercase I with the number 1.
- Do not include spaces, hyphens, or punctuation (e.g. use
CDDU1234567, notCDDU 123 456 7).
If your tracking search returns no data, verify whether the container has physically gated into the export terminal. Carrier systems usually publish the first milestone after terminal gate-in.