MACS container tracking

How to read a MACS container number

MOCJ2657001 example only — not a real shipment

Container numbers follow ISO 6346, the international standard for freight-container identification: four letters, six serial digits, then one check digit. The first three letters are the owner code — registered with the BIC (Bureau International des Containers) — and the fourth letter is the equipment category (U for a standard freight container).

Take MOCJ2657001 as a MACS-style example: MOCJ is the registered prefix (owner code MOC plus the category letter J), 265700 is the serial, and the final 1 is the check digit computed from the ten characters before it — tracking systems use it to catch typos before they search.

If your MACS tracking isn’t working

1. 1 Check the number format first

   Container numbers are exactly four letters plus seven digits (like MOCJ2657001). A common slip is confusing the letter O with zero, or dropping the final check digit. Copy the number from the door of the container or your booking confirmation rather than retyping it.

2. 2 Make sure the number was issued by this carrier

   If your shipment was booked through a freight forwarder, the number on your paperwork may be the forwarder’s own reference, which MACS’ system won’t recognise. Ask whoever issued your documents which carrier number to use — or paste the number on our homepage and we’ll work out who it belongs to.

3. 3 Too early or too late

   Timing matters: a number that was only just issued may not show results yet, and carriers remove old shipments from public tracking a few weeks after delivery. If the shipment is very new or long delivered, an empty result doesn’t mean the number is wrong.

4. 4 Paste carefully on MACS’ page

   MACS asks you to type the number on its own page, so paste it exactly — no spaces before or after, and no extra characters picked up from an email. If the page shows a security check, complete it and search again.

5. 5 Still nothing?

   Contact whoever sold you the freight service (your forwarder, broker, or MACS directly) with the container number and the booking reference — they can see internal status that public tracking doesn’t show.

Frequently asked questions

How do I track a MACS container?

Type your container number in the box above and press Track. You’ll land on MACS’ own tracking page — paste your number there and search. MACS container numbers usually begin with MOCJ, MOCU, MOCZ.

What does a MACS container number look like?

Container numbers follow the ISO 6346 standard: four letters then seven digits (for example CSNU1234567). The first four letters identify the owner. For MACS the owner prefixes are typically one of MOCJ, MOCU, MOCZ. A format-valid example is MOCJ2657001.

Why does the MACS page open without my number filled in?

MACS asks everyone to enter the number on its own page (it has a security check), so it can’t be filled in ahead of time. We bring you to the right page — just paste your number there.

What if my number doesn’t start with MOCJ or MOCU?

Then it probably wasn’t issued by MACS — shipments booked through a freight forwarder or partner carrier often travel under another company’s container number. Paste the number on our homepage and we’ll suggest the right shipping line, or check your shipping paperwork for who issued it.

Is this MACS’ official tracking site?

No — this is a free, independent tool that brings every carrier’s tracking together in one place. When you track here you end up on MACS’ own page, so everything you see comes straight from MACS. We never see or store your shipment details.