How Old Is My Shipping Container? Understanding Container Identification Numbers

If you own, hire or are thinking about buying a shipping container, you may want to know how old it is. Age can be useful background information, especially when comparing new, one-trip and used containers.

Most containers have identification numbers painted on the doors and sides. These numbers can tell you who registered the container and identify the individual unit, but they do not usually reveal the container’s age on their own.

To find the manufacture date, you normally need to look beyond the main identification number. The best place to check is usually the CSC plate, which is the metal safety approval plate fitted to containers used for international transport. This may show the date of manufacture, along with other important safety and specification details.

Where to Find a Shipping Container Identification Number

A shipping container identification number is usually displayed prominently on the container so the unit can be identified throughout its working life.

You will normally find the number on the container doors, particularly on the right-hand door. It is also commonly displayed on the side panels and roof, making it easier to identify the container in depots, ports, yards and transport operations.

The number is typically painted in large characters and follows a standard format. It may look something like:

ABCU 123456 7

This identification number stays with the container and helps operators, depots, shipping lines and owners track the unit.

If you are checking a used container, make sure the number is clear and legible. Heavy repainting, rust, repairs or years of wear can sometimes make older markings difficult to read.

What Does a Shipping Container Number Mean?

A standard container identification number is made up of four main parts: the owner code, equipment category identifier, serial number and check digit. The Bureau International des Containers, known as BIC, describes the container identification number as a combination of the owner prefix, equipment identifier, serial number and check digit.

Using the example ABCU 123456 7, the breakdown would be:

Owner code - The first three letters identify the registered owner or operator prefix. In the example above, this would be ABC. This does not always mean the container is still owned by that organisation today, especially if it has been sold into storage use.

Equipment category identifier - The fourth letter identifies the type of equipment. For freight containers, this is usually U. Other letters can be used for different types of container-related equipment.

Serial number - The six numbers identify the individual container within that owner or operator’s fleet. In the example above, this would be 123456.

Check digit - The final number is used to help validate the identification number and reduce errors when the number is recorded or transmitted. BIC explains that the check digit provides a way of validating the transmission accuracy of the owner/operator code and serial number.

This number is useful for identification, but it is not normally a direct age code.

Does the Serial Number Tell You When the Container Was Made?

In most cases, no. The serial number does not tell you when the container was manufactured.

It is easy to assume that the six-digit serial number might contain a date code, but that is generally not how container identification works. The serial number is there to identify the individual unit, not to show the month or year it was built.

This means you usually cannot look at the painted container number and work out the age of the container from that number alone.

There may be exceptions where a manufacturer, owner or leasing company can interpret internal records linked to a specific container number. However, for most buyers, the main ID number should be treated as an identification code rather than an age indicator.

Check the CSC Plate for the Manufacture Date

If you want to find the age of a shipping container, the CSC plate is usually the best place to check.

CSC stands for the International Convention for Safe Containers. Containers used for international transport normally carry a CSC safety approval plate. International Maritime Organization guidance explains that under the CSC, each freight container is required to carry a safety approval plate, usually fixed to the rear of the container, commonly on the left-hand door.

This plate normally includes key information about the container, including the manufacturer and the date of manufacture. The date may be shown as a month and year.

On a used storage container, the CSC plate is often more useful for dating the unit than the painted container number. If the plate is still present and legible, it can help you understand when the container was originally manufactured and approved for service.

However, it is worth remembering that the manufacture date is not the same as the container’s condition. A newer container can be damaged, and an older container can still be perfectly suitable for storage if it has been well maintained.

What Other Information Is Shown on the CSC Plate?

The CSC plate can provide more than just a manufacture date. It is designed to show important safety and specification information about the container.

This may include the approval reference, manufacturer details, container identification, maximum operating gross mass, allowable stacking load and other test or safety-related information. CSC documentation lists details such as the date of manufacture, maximum operating gross mass, allowable stacking load and transverse racking test force as information associated with the safety approval plate.

For buyers, this information can help provide useful background on the unit. It may confirm that the container was built and approved as a freight container, give clues about its original specification and support checks around stacking or transport use.

If you are buying a container purely for static storage, you may not need every detail on the CSC plate. However, it can still be helpful when assessing what you are buying, especially if you want to understand the container’s history or compare different units.

What if the CSC Plate Is Missing or Difficult to Read?

Older storage containers may have missing, damaged or illegible CSC plates.

This can happen for several reasons. The plate may have been removed, painted over, damaged during use, affected by corrosion or made unreadable by years of wear. On containers that have spent a long time in static storage, the plate may no longer be easy to inspect.

If the CSC plate is missing or unreadable, it may be harder to confirm the exact manufacture date. In that case, you may need to rely on the supplier’s information, any remaining documentation, visible markings and a physical inspection of the container.

For general storage use, a missing or unreadable plate does not automatically mean the container is unsuitable. However, it does limit what can be confirmed about the container’s age and original approval details.

If the container will be used for transport, stacking, export or any application where safety certification matters, the absence of a clear CSC plate may be more significant.

Can the Container Manufacturer Help Identify Its Age?

In some cases, the manufacturer or original fleet owner may be able to provide additional information linked to the container number.

This depends on whether records are available, whether the container number can be matched to those records and whether the container has changed ownership over time. Containers are often sold between shipping lines, leasing companies, depots and storage suppliers, so records can become harder to trace as a container gets older.

For newer containers, documentation may be easier to obtain. For older used storage containers, records may be limited or unavailable.

A reputable supplier may already know the approximate age or type of the container, especially if it is a new or one-trip unit. For older used containers, they may not always be able to confirm the exact manufacturing date, but they should still be able to explain the container’s condition and suitability for your intended use.

Does a Container’s Age Determine Its Condition?

Age matters, but it is only part of the picture.

A shipping container’s condition depends on many factors, including previous use, maintenance, handling, repairs, corrosion, structural damage and how it has been stored. A container that has had a hard working life may show more wear than an older unit that has been well looked after.

For storage use, condition is often more important than the exact year of manufacture. A buyer should look at whether the container is structurally sound, wind and watertight, secure and suitable for what they need to store.

Key things to consider include the roof, doors, floor, seals, frame, corrosion levels and any signs of impact damage. Door operation is also important. If the container is not sitting square, has damaged hinges or has distorted locking gear, it may be frustrating to use even if the rest of the structure appears sound.

A newer container may offer a cleaner appearance and a longer expected service life, but a good-quality used container can still provide excellent storage value.

What Should You Check When Buying an Older Container?

When buying an older shipping container, do not focus only on the manufacture date. It is more important to inspect the areas that affect security, usability and weather protection.

Start with the structure. Check for serious corrosion, cracks, large dents, distortion or signs that the frame has been twisted. Surface rust is common on used containers, but deep corrosion or structural damage may be more serious.

Next, check the roof. Look for holes, heavy dents or areas where water may collect. A watertight roof is essential if the container will be used for tool, stock, furniture or equipment storage.

The doors should open, close and lock properly. Stiff doors can sometimes be caused by poor positioning, but damaged hinges, worn seals or distorted locking bars may indicate a problem with the unit itself.

The floor should be checked for damage, rot, soft patches, contamination or excessive wear. This is particularly important if you are storing heavy equipment, machinery or materials.

Finally, look at the door seals and locking points. The seals help keep the container weather-resistant, while the locking gear affects everyday security and ease of use.

Understanding What You Are Buying

A shipping container’s identification number is useful, but it will not usually tell you how old the container is by itself.

The main number helps identify the registered owner code, equipment type, individual serial number and check digit. To find the manufacture date, you will usually need to look for the CSC plate, which may include the month and year of manufacture along with other safety and specification details.

Even then, age should not be the only factor in your decision. Condition, security, weather resistance, door operation and suitability for your intended use are usually more important than the year alone.

If you are buying or hiring a container, work with a supplier that can explain what you are getting. A reputable supplier should be clear about whether the container is new, one-trip or used, what condition it is in, and whether it is suitable for your storage needs.

TEU supplies new and used 10ft, 20ft and 40ft shipping containers for hire and sale across Liverpool, Merseyside, Cheshire, Lancashire and the wider North West. Whether you need a clean one-trip unit or a cost-effective used container for storage, we can help you choose a practical option for your site, budget and intended use.