WWSU container prefix

A container number beginning with WWSU is owned by Westwood Shipping, which operates under SCAC WWSU. Track a WWSU container by its number.

Prefix	WWSU
Owner	Westwood Shipping
Operating carrier	Westwood Shipping
SCAC	WWSU
Type	Carrier-owned

Track a WWSU container →

How a container number is built

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.

Not sure the number you have is valid? The last digit is a checksum — run it through the free ISO 6346 check-digit calculator before blaming the carrier's tracking.

WWSU — FAQ

What shipping line is WWSU?

WWSU containers are owned by Westwood Shipping (SCAC WWSU).

How do I track a WWSU container?

Track a WWSU container by its number on Westwood Shipping.

Owner data from TrackingMCP's verified BIC prefix registry. Updated 2026-07-16.