WWSU container prefix

A container number beginning with WWSU is owned by Westwood Shipping (Swire/WSL), which operates under SCAC CHVW. You can track a WWSU container directly on Swire Shipping.

Prefix	WWSU
Owner	Westwood Shipping (Swire/WSL)
Operating carrier	Swire Shipping
SCAC	CHVW
Type	Carrier-owned

Track a WWSU container →

Other prefixes owned by Westwood Shipping (Swire/WSL)

CHVU CHVW

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.

WWSU — FAQ

What shipping line is WWSU?

WWSU containers are owned by Westwood Shipping (Swire/WSL) (SCAC CHVW).

How do I track a WWSU container?

Track a WWSU container by its number on Swire Shipping — or use TrackingMCP's Swire Shipping page.

Owner data from TrackingMCP's verified BIC prefix registry. Updated 2026-07-14.