Understanding Container ISO Codes
At Shipping Containers of Manchester, we supply ISO-certified containers that meet the strict international standards required for safe and compliant transport worldwide. Knowing how ISO codes work ensures businesses and individuals make informed choices when buying or hiring containers.
What is a Container ISO Code?
An ISO code is a unique identifier assigned under ISO 6346, the international standard for container identification. These codes establish a universal system that enables ports, customs, and shipping companies to track and manage containers consistently across global supply chains.
Why are ISO Container Codes Important?
- Global Uniformity: ISO codes provide a common language for logistics operators worldwide.
- Efficiency: They simplify tracking, storage allocation, and container movements.
- Safety: Codes specify container size and weight limits, preventing overloading and unsafe use.
- Compliance: ISO markings ensure your unit meets international shipping regulations, avoiding costly fines or shipment delays.
How are ISO Container Codes Structured?
Each ISO container code contains four key elements:
- Owner Code: Three letters showing the company that owns the container.
- Equipment Category Identifier: Usually “U” for freight containers.
- Serial Number: A unique six-digit code identifying the container.
- Check Digit: A number used to validate the full code and prevent errors.
Example: MSCU 123456 7 “MSC” identifies the owner, “U” confirms it’s a freight container, “123456” is the serial number, and “7” is the check digit.
Common ISO Codes for Container Types
- Dry Storage Containers: 22G1 / 22G0 general cargo units.
- High Cube Containers: 45G1 offering extra height for bulky goods.
- Reefer Containers: 45R1 refrigerated units for food, pharmaceuticals, and perishables.
- Open Top Containers: 22U1 suited for oversized cargo and machinery.
- Tank Containers: 22T1 are designed for the transport of liquids and gases.
Where to Find the ISO Code on a Container
ISO codes are clearly displayed on the outside of the container, typically on the doors and side panels. This enables quicker and more reliable inspection, tracking, and customs processing.
Why It Matters When You Buy or Hire from Us
Every container supplied by Shipping Containers of Manchester complies with ISO 6346 standards. Whether you choose a 20ft storage container, a 40ft high cube, or a customised specialist conversion, your unit will always be certified, safe, and ready for both domestic use and international shipping.
Using ISO-certified containers ensures compliance, minimises unnecessary risks, and guarantees the secure transportation of your goods.
Need expert advice on container ISO codes or want to hire a compliant container in Greater Manchester? Call 0330 0130 636 or request a fast online quote today.
Frequently Asked Questions on Container ISO Codes
What does ISO stand for in shipping containers?
ISO stands for International Organisation for Standardisation, which sets global standards, including ISO 6346 for container identification.
Are all containers ISO certified?
Not always. Containers used for international shipping must be ISO certified, while some domestic storage containers may not carry ISO markings.
Why is the check digit significant?
The check digit validates the container number and prevents errors in booking, customs, and tracking systems.
Can I use a non-ISO container for export?
No. Export shipments require ISO-compliant containers. Non-ISO units are fine for static storage or domestic use only.
Where do I find the ISO code on my container?
It’s usually painted or plated on the container’s exterior doors and sides for easy identification during shipping and inspection.