Check intermodal loading unit identifiers.
Initialising algorithm engine for ILU-Code Check Digit Calculator...
How ILU-Code Check Digit Calculator Works?
The ILU Code Check Digit Calculator uses ISO 6346 on a 4-letter owner code and 6-digit serial. ILU means Intermodal Loading Unit. Letter values, powers of 2 and the modulo 11 step follow the same rule as container numbers.
- 1Enter the 4-letter ILU owner key and the 6-digit serial; the 4th letter marks the unit as an ILU instead of the U, J, or Z used on ISO containers.
- 2Convert letters to values A = 10, B = 12 … skipping multiples of 11.
- 3Multiply the 10 values by 2⁰ to 2⁹.
- 4Compute the sum modulo 11, then modulo 10.
- 5Append the check digit.
ILU-Code Check Digit Calculator Formula
The ILU formula is Check = (Σ v(cᵢ) × 2ⁱ mod 11) mod 10, as defined in EN 13044-1.
S = Σ v(cᵢ) × 2ⁱ, i = 0…9 (ILU CODE) Check = (S mod 11) mod 10 (ILU CODE)
v(c)follows the ISO 6346 letter table.
S = 5362 Check = 5 ILU code = AXFA 123456 5
ILU-Code Check Digit Calculator Conversion Table
The ILU conversion table lists sample ILU codes by unit type with their check digit.
| Owner key | Unit type | Serial | Check | ILU code |
|---|---|---|---|---|
| AXFA | Swap body | 123456 | 5 | AXFA 123456 5 |
| DBSB | Swap body | 000001 | 7 | DBSB 000001 7 |
| ECRC | Semi-trailer | 654321 | 3 | ECRC 654321 3 |
| TNTD | Swap body | 100200 | 6 | TNTD 100200 6 |
| KRBK | Swap body | 777777 | 3 | KRBK 777777 3 |
What is ILU-Code Check Digit Calculator?
An ILU Code Check Digit Calculator is a tool that computes the check digit of an Intermodal Loading Unit code used on European swap bodies and semi-trailers. The International Union for Road-Rail Combined Transport (UIRR) registers the owner keys.
ILU codes follow EN 13044 and share the ISO 6346 format, so the same terminal systems read both.
What are the uses of ILU-Code Check Digit Calculator?
There are 3 main uses of the ILU Code Check Digit Calculator, including terminal check-in, rail booking, and unit registration.
- Terminal check-in: Combined transport terminals verify ILU codes at the gate.
- Rail booking: Operators validate ILU codes on train bookings.
- Unit registration: Owners check codes before marking new units.