MNBU → Maersk · carrier prefix
MNBU 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.
MNBU is reserved for Maersk’s reefer fleet — spot it and you are almost certainly looking at a refrigerated box.
4 letters + 7 digits, printed on the doors
MNBU check digit: worked example
M | N | B | U | 3 | 0 | 6 | 4 | 6 | 3 |
|---|---|---|---|---|---|---|---|---|---|
| 24 | 25 | 12 | 32 | 3 | 0 | 6 | 4 | 6 | 3 |
| ×1 | ×2 | ×4 | ×8 | ×16 | ×32 | ×64 | ×128 | ×256 | ×512 |
| 24 | 50 | 48 | 256 | 48 | 0 | 384 | 512 | 1536 | 1536 |
Sum 4394 → 4394 mod 11 = 5 → check digit 5 → MNBU 306463-5
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 MNBU container prefix?
MNBU 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 MNBU container?
Track MNBU containers free on the official Maersk tracker at maersk.com — paste the full 11-character number (like the MNBU example on this page) and no account is needed.
Is MNBU 3064635 a valid container number?
Yes — MNBU 306463-5 passes ISO 6346 validation: the weighted letter-and-digit sum for MNBU306463 leaves remainder 5 mod 11, giving check digit 5. The worked table for this MNBU example is on this page.
Is MNBU a shipping line prefix or a leasing company prefix?
MNBU is a shipping-line (carrier) prefix — Maersk both owns the boxes and moves them, so owner and tracker are the same company.
Why is my MNBU container a reefer?
Because MNBU is the code Maersk registers for its refrigerated fleet — dry Maersk boxes ride under MAEU, MRKU and the other family codes instead.