Sealand container tracking

How to read a Sealand container number

MCPJ5654805 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 MCPJ5654805 as a Sealand-style example: MCPJ is the registered prefix (owner code MCP plus the category letter J), 565480 is the serial, and the final 5 is the check digit computed from the ten characters before it — tracking systems use it to catch typos before they search.

If your Sealand tracking isn’t working

1. 1 Check the number format first

   Container numbers are exactly four letters plus seven digits (like MCPJ5654805). 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 Sealand’s 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 Still nothing?

   Contact whoever sold you the freight service (your forwarder, broker, or Sealand 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 Sealand container?

Type your container number in the box above and press Track. You’ll land on Sealand’s own tracking page with your number already filled in. Sealand container numbers usually begin with MCPJ, MCPU, MCPZ.

What does a Sealand 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 Sealand the owner prefixes are typically one of MCPJ, MCPU, MCPZ. A format-valid example is MCPJ5654805.

Can I bookmark or share my Sealand tracking link?

Yes — once your shipment comes up on Sealand’s page, you can bookmark that page or send the link to a colleague, and they’ll see the same shipment.

What if my number doesn’t start with MCPJ or MCPU?

Then it probably wasn’t issued by Sealand — 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 Sealand’s 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 Sealand’s own page, so everything you see comes straight from Sealand. We never see or store your shipment details.