SeaLead container tracking

How to read a SeaLead container number

SLVJ5696034 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 SLVJ5696034 as a SeaLead-style example: SLVJ is the registered prefix (owner code SLV plus the category letter J), 569603 is the serial, and the final 4 is the check digit computed from the ten characters before it — tracking systems use it to catch typos before they search.

If your SeaLead tracking isn’t working

1. 1 Check the number format first

   Container numbers are exactly four letters plus seven digits (like SLVJ5696034). 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 SeaLead’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

   New shipments can take a little while to appear — most carriers only start returning results once the container is in their system after export gate-in or acceptance. Long-delivered shipments drop out too: tracking data is usually purged weeks or months after delivery.

4. 4 Paste carefully on SeaLead’s page

   SeaLead 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?

   Your booking agent or SeaLead’s customer service can look the shipment up internally — have the container number and the issuing office or booking reference handy when you ask.

Frequently asked questions

How do I track a SeaLead container?

Type your container number in the box above and press Track. You’ll land on SeaLead’s own tracking page — paste your number there and search. SeaLead container numbers usually begin with SLVJ, SLVU, SLVZ.

What does a SeaLead 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 SeaLead the owner prefixes are typically one of SLVJ, SLVU, SLVZ. A format-valid example is SLVJ5696034.

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

SeaLead 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 SLVJ or SLVU?

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