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