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Understanding Container Markings: Shipping Container Numbers and Key Identifications Explained

Shipping Container Markings
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Shipping containers are the backbone of global trade, moving goods across continents efficiently and securely. But have you ever wondered about the series of letters, numbers, and symbols printed on these steel boxes? These are ISO container markings, crucial for tracking, identification, and safety. 

In this blog, we’ll break down the different types of markings, what they mean, and why they matter.

What Are Container Markings?

Container markings are standardized codes, numbers, and labels displayed on shipping containers. They provide vital information about the container’s ownership, specifications, and safety approvals. These markings ensure smooth handling, proper stacking, and accurate tracking during transportation.

Types of Markings on a Container

1. Owner’s Code and Identification

The owner’s code is a unique three-letter prefix followed by a category identifier, often ‘U’ for freight containers. This helps identify the company that owns the container. For example, in “ABCU 123456 7,” “ABC” is the owner’s code.

2. Serial Number and Check Digit

Following the owner’s code is a six-digit serial number unique to each container. The final number is the check digit, used to verify the accuracy of the shipping container number. This system helps prevent errors during data entry.

3. Weight Markings

These indicate the container’s maximum gross weight, tare weight (empty weight), and net weight (payload capacity). Proper marking on the container regarding weight ensures safe stacking and transport, preventing overloading.

4. CSC Plate (Safety Approval Plate)

The CSC (Container Safety Convention) plate certifies that the container meets safety standards. It includes information like the container’s dimensions, weight limits, and inspection dates, confirming its suitability for global shipping.

Shipping Container Numbers and Their Role

The shipping container number is a critical identifier in global logistics. It combines the owner’s code, serial number, and check digit, forming a unique code for each container. This number is used in tracking systems worldwide, allowing companies to monitor the container’s location, status, and history at any time.

Importance of Standardized Markings

Importance of Standardized Container Markings

Standardized ISO container markings are essential for several reasons:

  • Global Consistency: Ensures containers are recognized and processed efficiently across countries and ports.
  • Safety: Provides critical information for safe handling and stacking.
  • Traceability: Simplifies tracking and logistics management, reducing the risk of lost or misplaced cargo.

Common Mistakes in Container Markings

Errors in marking can lead to logistical delays, safety hazards, and compliance issues. Common mistakes include:

  • Incorrect owner codes or serial numbers
  • Faded or illegible markings
  • Mismatched check digits
  • Inaccurate weight markings

Regular inspections and proper maintenance are key to avoiding these issues.

Bottom Line

Understanding container markings isn’t just for shipping professionals; it’s vital for anyone involved in global trade. From the shipping container number to the CSC plate, every detail plays a role in ensuring efficient and safe transport.

At Arcon Containers, we take pride in being one of India’s leading providers of container solutions. We offer a wide range of containers for sale and lease, from standard dry containers to specialized ISO tank containers. Our containers meet global standards, with clear, accurate markings for hassle-free logistics. Whether you need containers for storage, transportation, or customized solutions, we’ve got you covered.


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