INBU → SeaCube Containers · lessor prefix
INBU Container Prefix — SeaCube Containers (Leasing)
SeaCube Containers is the reefer specialist among the big lessors, with one of the world’s largest refrigerated-box fleets managed from New Jersey.
Its single code most often appears on reefers, which makes an INBU sighting a good bet for cold-chain cargo.
4 letters + 7 digits, printed on the doors
INBU check digit: worked example
I | N | B | U | 2 | 6 | 6 | 5 | 7 | 1 |
|---|---|---|---|---|---|---|---|---|---|
| 19 | 25 | 12 | 32 | 2 | 6 | 6 | 5 | 7 | 1 |
| ×1 | ×2 | ×4 | ×8 | ×16 | ×32 | ×64 | ×128 | ×256 | ×512 |
| 19 | 50 | 48 | 256 | 32 | 192 | 384 | 640 | 1792 | 512 |
Sum 3925 → 3925 mod 11 = 9 → check digit 9 → INBU 266571-9
SeaCube Containers prefix family
| Prefix | INBU (this page) |
|---|
Prefix register verified against two independent sources on 2026-08-03.
Owner vs operator: the SeaCube Containers case
A SeaCube reefer still tracks with the line that booked it — SeaCube manages the machine, not the voyage.
Frequently asked questions
Who owns the INBU container prefix?
INBU is registered to SeaCube Containers, a container leasing company (lessor) — the BIC register lists it, but the boxes sail in other lines' fleets.
Which line do I track a INBU container with?
Not with SeaCube Containers — a INBU box is leased, so the tracking data lives with the shipping line named on your booking confirmation or bill of lading; open that line's tracker and paste the INBU number there.
Is INBU 2665719 a valid container number?
Yes — INBU 266571-9 passes ISO 6346 validation: the weighted letter-and-digit sum for INBU266571 leaves remainder 9 mod 11, giving check digit 9. The worked table for this INBU example is on this page.
Is INBU a shipping line prefix or a leasing company prefix?
INBU is a leasing-company (lessor) prefix — SeaCube Containers owns the steel box, while a shipping line operates it, which is why owner and tracker differ.