2 prefixes · leasing company
Florens container prefixes: FCIU, FSCU
FCIU and FSCU are registered to Florens, a container leasing company. Florens owns the box and does not carry it: track it with the shipping line named on your booking or bill of lading, because that line holds the record of where it is. The check digit is worked out below for each prefix.
Florens is the leasing arm of the COSCO group, running a fleet of nearly four million TEU from Hong Kong — some of it leased to third parties, some circulating inside COSCO’s own services.
Two codes are registered plainly to Florens; a third Florens-registered code is treated as COSCO fleet equipment and covered on the COSCO pages.
4 letters + 7 digits, printed on the doors. It is on your bill of lading too.
The answer appears as you type. Nothing is sent anywhere.
All 2 Florens prefixes
| Prefix | A valid number | Check digit | Where the code comes from |
|---|---|---|---|
FCIU | FCIU 226679-3 | 3 | — |
FSCU | FSCU 366301-1 | 1 | — |
Prefix register verified against two independent sources on 2026-08-03. The example numbers are computed to show the arithmetic. They are valid by construction, not numbers we saw on a box.
Data: BIC Container Prefix Register · ISO 6346:2022
FCIU: check digit, worked through
FCIU is registered to Florens. Take FCIU 226679-3: each of its first ten characters has a value and a weight, the products are added, and the remainder after dividing by 11 is the check digit — here 3.
| Character | Value | Weight | Product |
|---|---|---|---|
F | 16 | ×1 | 16 |
C | 13 | ×2 | 26 |
I | 19 | ×4 | 76 |
U | 32 | ×8 | 256 |
2 | 2 | ×16 | 32 |
2 | 2 | ×32 | 64 |
6 | 6 | ×64 | 384 |
6 | 6 | ×128 | 768 |
7 | 7 | ×256 | 1792 |
9 | 9 | ×512 | 4608 |
Sum 8022 → 8022 mod 11 = 3 → check digit 3 → FCIU 226679-3
FSCU: check digit, worked through
FSCU is registered to Florens. Take FSCU 366301-1: each of its first ten characters has a value and a weight, the products are added, and the remainder after dividing by 11 is the check digit — here 1.
| Character | Value | Weight | Product |
|---|---|---|---|
F | 16 | ×1 | 16 |
S | 30 | ×2 | 60 |
C | 13 | ×4 | 52 |
U | 32 | ×8 | 256 |
3 | 3 | ×16 | 48 |
6 | 6 | ×32 | 192 |
6 | 6 | ×64 | 384 |
3 | 3 | ×128 | 384 |
0 | 0 | ×256 | 0 |
1 | 1 | ×512 | 512 |
Sum 1904 → 1904 mod 11 = 1 → check digit 1 → FSCU 366301-1
Owner and operator: who tracks a Florens box
Florens boxes often ride COSCO ships, but the register entry stays a lessor entry — track with whichever line issued your bill of lading.
Can you see where the ship is?
Not from the container. A standard dry box has no power, no radio and no satellite receiver — it is a steel case with a number painted on it, and it reports nothing about itself. Every position you see against a Florens shipment was reported by something else: a terminal crane, a gate reader, or the ship.
A live map on a carrier’s tracking page is almost always plotting AIS, the transponder every large vessel broadcasts with its position, course and speed. That is genuinely useful at sea: it is a real position rather than a schedule, and an ETA recalculated from actual movement. It is also the ship’s position, not your box’s, and the two part company the moment the container is discharged.
On land the map goes quiet. Between the gate-out and the delivery there is no vessel to follow, and the road leg appears only as whatever events the terminal and the trucker report. A container sitting on a chassis in a yard shows the last position of a ship it left days ago. Only specialised IoT equipment reports its own location, and wherever that exists it is a paid product sold to the shipper, not something a tracking page gives away.
Frequently asked questions
Who owns FCIU and FSCU containers?
Florens does, a container leasing company — the BIC register lists 2 owner prefixes under it: FCIU and FSCU, and the boxes sail in other lines' fleets.
How do I track a FCIU container?
Not with Florens — a FCIU box is leased, so the record of its journey is with the shipping line named on your booking confirmation or bill of lading. Open that line's tracker and paste the number there.
Why does Florens have 2 prefixes?
Because one prefix holds only a million serial numbers, and a lessor that merges with another keeps the codes already painted on the boxes. All 2 belong to the same company.
Is FCIU a shipping line prefix or a leasing prefix?
A leasing prefix — Florens owns the steel box while a shipping line operates it, which is why the owner and the tracker are different companies.
Is FCIU2266793 a valid container number?
Yes — FCIU 226679-3 passes the ISO 6346 check: the weighted sum for FCIU226679 leaves a remainder of 3 when divided by 11, which gives check digit 3. It is an example computed for this page, not a box we have seen.
One page, every owner code
Know whose box it is before you search
All 85 owner prefixes mapped to their line or leasing company, with the leased ones marked — so you can tell at a glance when to track with the line instead. Container dimensions are on page two.
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