OOCU → OOCL · carrier prefix
OOCU Container Tracking — OOCL-Owned Prefix
Track on oocl.com — official OOCL tracker
OOCL — Orient Overseas Container Line — is the Hong Kong carrier famous for running some of the biggest ships afloat, and since 2018 a COSCO group member that kept its own brand and systems.
Two codes cover the OOCL pool, and boxes keep tracking on oocl.com rather than the parent’s site, a distinction that trips up plenty of shippers.
4 letters + 7 digits, printed on the doors
OOCU check digit: worked example
O | O | C | U | 3 | 7 | 6 | 2 | 7 | 4 |
|---|---|---|---|---|---|---|---|---|---|
| 26 | 26 | 13 | 32 | 3 | 7 | 6 | 2 | 7 | 4 |
| ×1 | ×2 | ×4 | ×8 | ×16 | ×32 | ×64 | ×128 | ×256 | ×512 |
| 26 | 52 | 52 | 256 | 48 | 224 | 384 | 256 | 1792 | 2048 |
Sum 5138 → 5138 mod 11 = 1 → check digit 1 → OOCU 376274-1
OOCL prefix family
| Prefix | OOCU (this page) OOLU |
|---|
Prefix register verified against two independent sources on 2026-08-03.
Tracking with OOCL
oocl.com keeps its own cargo-tracking page separate from COSCO’s — use it for any OOLU/OOCU number even though the companies share a parent.
Frequently asked questions
Who owns the OOCU container prefix?
OOCU is registered to OOCL, founded 1969 — one of 2 prefixes the line holds in the BIC register, alongside OOLU.
How do I track a OOCU container?
Track OOCU containers free on the official OOCL tracker at oocl.com — paste the full 11-character number (like the OOCU example on this page) and no account is needed.
Is OOCU 3762741 a valid container number?
Yes — OOCU 376274-1 passes ISO 6346 validation: the weighted letter-and-digit sum for OOCU376274 leaves remainder 1 mod 11, giving check digit 1. The worked table for this OOCU example is on this page.
Is OOCU a shipping line prefix or a leasing company prefix?
OOCU is a shipping-line (carrier) prefix — OOCL both owns the boxes and moves them, so owner and tracker are the same company.