SEAU → Maersk · carrier prefix
SEAU Container Tracking — Maersk-Owned Prefix
Track on maersk.com — official Maersk trackerMaersk's tracker accepts the container number directly in the link — the checker below builds it for you.
Maersk has been moving boxes since the dawn of containerisation and its fleet is second only to MSC. A century-old Copenhagen shipping house, it grew through the acquisitions of Sealand, P&O Nedlloyd and Hamburg Süd — and each purchase left its mark in the BIC register.
That is why the Maersk family spans eight prefixes: the heritage codes of absorbed lines still ride on the sides of thousands of boxes, all answering to the same maersk.com tracker.
SEAU is Sealand heritage — the code of the company that invented container shipping in 1956, kept alive in the register after Maersk absorbed Sealand.
4 letters + 7 digits, printed on the doors
SEAU check digit: worked example
S | E | A | U | 1 | 5 | 6 | 8 | 6 | 8 |
|---|---|---|---|---|---|---|---|---|---|
| 30 | 15 | 10 | 32 | 1 | 5 | 6 | 8 | 6 | 8 |
| ×1 | ×2 | ×4 | ×8 | ×16 | ×32 | ×64 | ×128 | ×256 | ×512 |
| 30 | 30 | 40 | 256 | 16 | 160 | 384 | 1024 | 1536 | 4096 |
Sum 7572 → 7572 mod 11 = 4 → check digit 4 → SEAU 156868-4
Maersk prefix family
Tracking with Maersk
The maersk.com tracker takes the container number straight in the URL, so a deep link opens your box directly — no form to fill.
Frequently asked questions
Who owns the SEAU container prefix?
SEAU is registered to Maersk, founded 1904 — one of 8 prefixes the line holds in the BIC register, alongside MAEU, MRKU, MSKU.
How do I track a SEAU container?
Track SEAU containers free on the official Maersk tracker at maersk.com — paste the full 11-character number (like the SEAU example on this page) and no account is needed.
Is SEAU 1568684 a valid container number?
Yes — SEAU 156868-4 passes ISO 6346 validation: the weighted letter-and-digit sum for SEAU156868 leaves remainder 4 mod 11, giving check digit 4. The worked table for this SEAU example is on this page.
Is SEAU a shipping line prefix or a leasing company prefix?
SEAU is a shipping-line (carrier) prefix — Maersk both owns the boxes and moves them, so owner and tracker are the same company.