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SMLU container prefix

A container number beginning with SMLU is owned by SM Line, which operates under SCAC SMLU. You can track a SMLU container directly on SM Line.

PrefixSMLU
OwnerSM Line
Operating carrierSM Line
SCACSMLU
TypeCarrier-owned

Track a SMLU container →

Other prefixes owned by SM Line

SMLM

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.

SMLU — FAQ

What shipping line is SMLU?

SMLU containers are owned by SM Line (SCAC SMLU).

How do I track a SMLU container?

Track a SMLU container by its number on SM Line — or use TrackingMCP's SM Line page.

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