TRACKINGMCP · All container prefixes ↗
A container number beginning with MSDU is owned by MSC, which operates under SCAC MSCU. You can track a MSDU container directly on MSC. (ex-Dan Container, absorbed into MSC)
| Prefix | MSDU |
|---|---|
| Owner | MSC |
| Operating carrier | MSC |
| SCAC | MSCU |
| Type | Carrier-owned |
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.
MSDU containers are owned by MSC (SCAC MSCU).
Track a MSDU container by its number on MSC — or use TrackingMCP's MSC page.
Owner data from TrackingMCP's verified BIC prefix registry. Updated 2026-07-14.