Common Barcode Types

Common Barcode Types Used for Product Traceability

Overview of the most common barcode types, their formats, and industry uses
Product traceability is a critical component of modern supply chain management. Across industries such as pharmaceuticals, medical devices, food and beverage, and logistics, the ability to track a product’s journey from production to end use ensures operational efficiency, regulatory compliance, and patient or consumer safety. Barcodes serve as the cornerstone of these traceability systems, providing a reliable, machine-readable connection between physical products and digital records. By encoding product information such as batch numbers, serial numbers, and expiration dates, barcodes make it possible to automate inventory management, support regulatory reporting, and facilitate rapid product recalls when necessary.

What Is Product Traceability?

Product traceability refers to the ability to monitor and document the history, application, or location of a product throughout its lifecycle. In highly regulated industries, traceability is not only a best practice—it is a regulatory requirement. For example, pharmaceuticals must comply with the Drug Supply Chain Security Act (DSCSA), which mandates serialization and electronic tracking of all prescription drugs in the United States. Similarly, medical devices require adherence to Unique Device Identification (UDI) standards, ensuring that each device can be accurately traced from manufacturing through distribution and use. Food manufacturers also rely on traceability to quickly identify and recall affected batches in the event of contamination, protecting consumers and brand reputation.


A robust traceability system links each unit of product to its production, distribution, and storage history. Barcodes encode this information in a format that can be scanned at each point in the supply chain, reducing human error, ensuring data consistency, and providing a verifiable audit trail.

How Barcodes Support Tracking Across the Supply Chain

Barcodes play a central role in operationalizing product traceability. At the manufacturing stage, barcodes record critical information such as production batch, lot numbers, and expiration dates. When products move to distribution centers or warehouses, scanning the barcode automatically updates inventory management systems, enabling real-time visibility of stock levels. In retail or healthcare environments, scanning a barcode ensures that the correct product reaches the customer or patient, while also providing data for reporting and regulatory compliance.


For instance, a pharmaceutical manufacturer can use serialized GS1‑128 barcodes to track each package of medication. If a quality issue arises in a specific batch, scanning the barcode allows the manufacturer to isolate and recall only affected units, rather than issuing a broad, disruptive recall. In food supply chains, barcodes help trace contaminated batches back to the source, minimizing risk and ensuring timely action. By automating data capture and linking physical products to digital systems, barcodes increase efficiency, reduce operational errors, and enhance compliance across the supply chain.

One-Dimensional (1D) Barcode Types for Traceability

One-dimensional barcodes, or linear barcodes, encode information using a series of vertical bars and spaces along a single axis. These codes are widely used in retail, manufacturing, and logistics due to their simplicity, speed of scanning, and compatibility with a broad range of scanners.

UPC (Universal Product Code)

UPC (Universal Product Code) is one of the most recognized 1D barcodes, commonly used in retail for product identification. While primarily designed to track SKUs, UPC codes can be integrated into broader traceability systems by linking each code to digital records of production and distribution.

EAN (European Article Number)

EAN (European Article Number) serves a similar function internationally, with a 13-digit standard that accommodates country and manufacturer identifiers. EAN-8 is a smaller variant suitable for limited packaging space. These codes allow products to be identified consistently across global supply chains.

Code 128

Code 128 is a high-density linear barcode capable of encoding alphanumeric data. Its versatility makes it ideal for tracking batches, serial numbers, and other complex identifiers that are critical in regulated industries. For example, a medical device manufacturer can encode the GTIN, lot number, and serial number in a single Code 128 barcode, ensuring compliance with UDI regulations.

Code 39

Code 39 is another alphanumeric barcode commonly used in industrial settings, including warehouse operations and assembly lines. It supports letters, numbers, and a limited set of symbols, allowing manufacturers to track production information and serial numbers efficiently.

ITF / Interleaved 2 of 5

ITF / Interleaved 2 of 5 encodes numeric data and is frequently used on cartons and pallets where high-volume logistics require reliable scanning across long distances. By linking these barcodes to traceability systems, organizations can monitor product flow from manufacturer to distribution center to retailer.

Two-Dimensional (2D) Barcode Types for High‑Density Traceability

Two-dimensional barcodes, unlike linear barcodes, encode data both horizontally and vertically. This allows them to store significantly more information in a smaller space, making them ideal for high-density traceability applications, particularly in regulated industries like pharmaceuticals and medical devices. Their compact design ensures that even small vials, syringes, or device components can carry complete traceability information, including GTINs, serial numbers, lot numbers, and expiration dates.

DataMatrix Codes

DataMatrix Codes are one of the most widely used 2D barcode types in regulated industries. They are highly compact and can encode large amounts of data in tiny spaces, which is critical for small medical devices or pharmaceutical packaging. Compliance with FDA UDI regulations often requires DataMatrix codes for unique identification, ensuring each unit can be traced throughout its lifecycle. DataMatrix codes are resilient to damage and distortion, which is essential for scanning accuracy in production, shipping, and clinical environments.

QR Codes

QR Codes are another versatile 2D barcode option. While traditionally associated with consumer applications like marketing or digital engagement, QR codes are increasingly used in logistics and traceability systems where a larger surface area allows for more robust printing and scanning. They can store URLs, alphanumeric data, and complex traceability information, enabling integration with digital supply chain platforms. In some manufacturing settings, QR codes are used to link physical products to online records, streamlining inventory management and compliance reporting.

PDF417

PDF417 is a stacked linear barcode that supports high-capacity data encoding. Its ability to include multiple fields in a single barcode makes it suitable for complex labeling requirements, such as shipping manifests, pallet tracking, and cross-border logistics documentation. PDF417 is particularly useful for traceability in sectors where multiple identifiers must be captured and verified simultaneously.

Aztec Code and Other 2D Variants

Aztec Codes and Other 2D Variants offer additional options for high-density traceability. Aztec codes are particularly effective in transportation and airline baggage tracking due to their fast scanning capability and error correction, while other 2D variants are used in specialized applications such as laboratory sample tracking or industrial component serialization. Selecting the right 2D barcode type depends on packaging size, required data density, and compliance needs.

GS1‑128 and Serialized Traceability

GS1‑128 barcodes are a cornerstone for serialized traceability. They allow manufacturers to encode multiple pieces of critical information in a single symbol, including GTINs, lot numbers, expiration dates, and serial numbers. This capability is vital for regulatory compliance in industries such as pharmaceuticals, medical devices, and food safety, where each unit must be individually identifiable and traceable.


Serialization enables end-to-end traceability. In practice, a pharmaceutical company can assign a unique serial number to each package, which is then encoded into a GS1‑128 barcode. Scanning this barcode at any point in the supply chain—warehouse, distributor, pharmacy—updates centralized databases with the product’s status, location, and authenticity. In the event of a recall, only the affected serial numbers need to be identified, preventing unnecessary disruption and protecting patient safety.


GS1‑128 also supports interoperability with global supply chain partners. By adhering to GS1 standards, organizations ensure that barcode data is consistently readable across different systems, facilitating accurate reporting, customs documentation, and regulatory submissions.

How to Choose the Right Barcode Type for Product Traceability

Selecting the appropriate barcode type requires a careful balance of regulatory requirements, operational constraints, and packaging considerations. Linear barcodes, such as UPC, EAN, Code 39, and Code 128, remain suitable for applications where limited data is required and space is abundant. In contrast, 2D barcodes are essential when space is constrained or when high-density traceability information must be included.


Consider the amount of data to encode: smaller datasets may be efficiently managed with linear barcodes, while large datasets (including serial numbers, lot codes, and expiration dates) require 2D barcodes. Packaging size also influences the decision: small vials or device components may necessitate DataMatrix codes for legibility, whereas pallets and cartons may accommodate larger linear or QR codes.


Regulatory requirements are often the decisive factor. Pharmaceuticals and medical devices must comply with DSCSA and UDI mandates, respectively, dictating specific barcode types and encoding standards. Finally, scanning environments must be considered: warehouses, healthcare facilities, and retail outlets each use different scanning technology, and barcode selection should ensure reliable readability under expected conditions.

Industry Applications of Barcode Traceability

Barcode traceability supports product visibility, compliance, and risk management across regulated industries. While the core function remains the same, linking physical products to digital data, the implementation varies based on regulatory requirements and supply chain complexity.

Pharmaceuticals

In the pharmaceutical industry, traceability is essential for patient safety and regulatory compliance. Barcodes encode GTINs, lot numbers, and expiration dates to ensure each package is uniquely identifiable. DSCSA regulations require serialization of all prescription drugs in the United States, and DataMatrix or GS1‑128 barcodes are commonly used to meet these requirements. This allows manufacturers, distributors, and pharmacies to track every package from production through dispensing, reducing the risk of counterfeit medications entering the supply chain.

Medical Devices

Medical devices must comply with UDI regulations, which mandate unique identification for every device. This ensures traceability from manufacturing through clinical use. 2D DataMatrix codes are often required for small devices, providing a compact yet high-density format to capture GTIN, serial number, and lot information. These codes support adverse event reporting, recalls, and quality monitoring, helping healthcare providers and regulators maintain patient safety.

Food & Beverage

Barcodes in the food and beverage industry enable rapid recall management, inventory control, and supply chain visibility. GS1-compliant barcodes, such as UPC/EAN codes for consumer products, support global trade by providing consistent identification across suppliers, distributors, and retailers. High-volume manufacturers may also use QR codes to encode batch numbers and production dates, enabling traceability down to individual cases or bottles, which is essential for food safety and compliance with regulations like FSMA (Food Safety Modernization Act).

Logistics & Warehousing

In logistics and warehousing, barcodes are vital for efficient inventory management, order fulfillment, and shipping accuracy. Linear and 2D barcodes track pallets, cartons, and individual products across complex distribution networks. GS1‑128 and QR codes enable rapid scanning and integration with warehouse management systems, ensuring accurate stock counts, reducing errors, and providing traceable data for audits and compliance reporting.

Best Practices for Barcode Traceability Implementation

Successful barcode traceability depends on proper planning, execution, and continuous monitoring. Organizations should begin with a compliance-first approach, identifying applicable regulations and standards for their industry. Barcode types should be selected based on data requirements, packaging constraints, and scanning environment conditions.


Print quality and verification are critical. Barcodes must meet ISO/ANSI grading standards to ensure scannability under all conditions. Regular quality checks, including testing on actual packaging materials, help prevent supply chain disruptions.


Integration with digital systems is also essential. Traceability databases, ERP systems, and warehouse management software should be configured to capture and analyze barcode data in real time. Training staff on proper scanning and data entry procedures ensures accurate data collection and minimizes errors.


Finally, organizations should implement a continuous improvement program. Periodic audits, compliance reviews, and updates to barcode standards (e.g., GS1 Application Identifiers) help maintain accuracy, regulatory compliance, and operational efficiency over time.

Barcode Labeling & Asset Tracking FAQs

Have questions about barcode standards, types, labeling systems, or on advanced tracking technologies?


Visit our FAQ page for clear, straightforward answers designed to support compliance and help you make informed decisions.

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