1 prefix · shipping line
SITU container prefix: SITC Container Lines
Track on api.sitcline.com — official SITC Container Lines tracker
Full SITC Container Lines container tracking guide →
SITU is the BIC owner prefix registered to SITC Container Lines. A container number that starts with it belongs to the SITC Container Lines fleet and is tracked free at api.sitcline.com. The eleventh character of the number is a check digit; it is worked out below for this prefix.
SITC Container Lines runs one of the densest intra-Asia grids from its Hong Kong listing and Shanghai operations, ranking fourteenth despite modest ship sizes.
A single code covers the pool, tracked via the sitcline.com query service.
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.
The SITC Container Lines prefix
| Prefix | A valid number | Check digit | Where the code comes from |
|---|---|---|---|
SITU | SITU 805113-0 | 0 | — |
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
SITU: check digit, worked through
SITU is registered to SITC Container Lines. Take SITU 805113-0: 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 0.
| Character | Value | Weight | Product |
|---|---|---|---|
S | 30 | ×1 | 30 |
I | 19 | ×2 | 38 |
T | 31 | ×4 | 124 |
U | 32 | ×8 | 256 |
8 | 8 | ×16 | 128 |
0 | 0 | ×32 | 0 |
5 | 5 | ×64 | 320 |
1 | 1 | ×128 | 128 |
1 | 1 | ×256 | 256 |
3 | 3 | ×512 | 1536 |
Sum 2816 → 2816 mod 11 = 0 → check digit 0 → SITU 805113-0
Tracking a SITC Container Lines container
Paste the number into the form at api.sitcline.com. We have not tested whether a link can carry the number there, so the checker on this page sends you to the form.
| Container number | ✓ yes |
|---|---|
| Bill of lading (B/L) | ✓ yes |
| Booking reference | — no |
| Mobile app | ✓ yes |
| Pre-filled link | not tried yet |
| Its bill of lading starts with | no published prefix |
Browser-verified 2026-08-03
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 SITC Container Lines 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 the SITU container prefix?
SITC Container Lines does, a shipping line founded in 1991 — the BIC register lists SITU under it.
How do I track a SITU container?
Free, on the official SITC Container Lines tracker at api.sitcline.com — paste the full 11-character number; no account is needed. The same tracker serves every number with this prefix.
Is SITU a shipping line prefix or a leasing prefix?
A shipping line prefix — SITC Container Lines both owns the box and moves it, so the owner and the tracker are the same company.
Is SITU8051130 a valid container number?
Yes — SITU 805113-0 passes the ISO 6346 check: the weighted sum for SITU805113 leaves a remainder of 0 when divided by 11, which gives check digit 0. 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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