TRACKINGMCP · All container prefixes ↗
A container number beginning with IWCU is a leased box owned by Interpool — a container-leasing company, not a shipping line. The box is leased to whichever carrier is moving it, so you can't identify the carrier from the IWCU prefix alone. Track it by its bill of lading or booking number with the operating carrier. (Interpool variant)
| Prefix | IWCU |
|---|---|
| Owner | Interpool |
| Type | Leasing company (leased box) |
Every shipping container carries an ISO 6346 number: four letters then seven digits (six serial + one check digit). The first three letters are the owner code and the fourth is always U for a freight container — so the four-letter prefix identifies who owns the box. Owner ≠ always the line carrying it: leasing companies own millions of boxes that sail under many carriers, which is why a leasing prefix is tracked by bill of lading, not by the prefix.
No. IWCU is a container-leasing prefix owned by Interpool. The box is leased to a carrier, so track it by bill of lading rather than by the IWCU prefix.
Enter the bill of lading or booking number with the carrier that's actually moving the IWCU box — the leasing owner (Interpool) doesn't operate the sailing.
Owner data from TrackingMCP's verified BIC prefix registry. Updated 2026-07-14.