PONU → Maersk · carrier prefix
PONU 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.
PONU is the P&O Nedlloyd legacy code, in Maersk hands since the 2005 takeover.
4 letters + 7 digits, printed on the doors
PONU check digit: worked example
P | O | N | U | 7 | 1 | 5 | 3 | 5 | 6 |
|---|---|---|---|---|---|---|---|---|---|
| 27 | 26 | 25 | 32 | 7 | 1 | 5 | 3 | 5 | 6 |
| ×1 | ×2 | ×4 | ×8 | ×16 | ×32 | ×64 | ×128 | ×256 | ×512 |
| 27 | 52 | 100 | 256 | 112 | 32 | 320 | 384 | 1280 | 3072 |
Sum 5635 → 5635 mod 11 = 3 → check digit 3 → PONU 715356-3
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 PONU container prefix?
PONU 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 PONU container?
Track PONU containers free on the official Maersk tracker at maersk.com — paste the full 11-character number (like the PONU example on this page) and no account is needed.
Is PONU 7153563 a valid container number?
Yes — PONU 715356-3 passes ISO 6346 validation: the weighted letter-and-digit sum for PONU715356 leaves remainder 3 mod 11, giving check digit 3. The worked table for this PONU example is on this page.
Is PONU a shipping line prefix or a leasing company prefix?
PONU is a shipping-line (carrier) prefix — Maersk both owns the boxes and moves them, so owner and tracker are the same company.