ISO 11784:2024

Overview - ISO 11784:2024 (Radio frequency identification of animals - Code structure)

ISO 11784:2024 specifies the structure of the radio‑frequency identification (RFID) code used to identify animals. The standard defines a 64‑bit code layout (bits 1–64, MSB leftmost) split into distinct code fields-for example, a global country code (CC) and a national identification code-so that the combination provides a unique worldwide animal identifier. The document also defines bit‑level fields for retagging, limited user data, flags for advanced transponders, and rules for manufacturer coding and registration.

Key topics and technical requirements

• Code structure and bit numbering: The transponder code is in natural binary, bit 1 is MSB, bit 64 LSB. Table 1 in the standard specifies each field.
• Mandatory fields:
  • Flag (bit 1): distinguishes animal (1) vs non‑animal (0) use.
  • CC (bits 17–26): ISO 3166 numeric‑3 country codes (000–899) or manufacturer codes (900–998); CC 999 reserved for test transponders.
  • National ID (bits 27–64): unique number within the CC; together with CC yields worldwide uniqueness.
• Optional fields: retagging counter (bits 2–4), user information (bits 5–9), starting digit for visual number (bits 12–14), RUDI‑bit (bit 15) for ISO 14223 advanced transponders, and data‑block flag (bit 16).
• Manufacturer codes and Registration Authority (RA): Use and issuance of MFCs are governed via ISO 24631‑1; RA approves test labs, issues/manages manufacturer and product codes, and enforces conditions (Annexes A–D).
• Implementation rules: transponders marketed for animal ID must be conformant with ISO 11784 and ISO 11785, have locked ISO 11784 codes, and manufacturers must maintain immutable mappings between silicon serial numbers and programmed codes.

Applications and practical value

• Livestock and companion‑animal identification for traceability, disease control, ownership, and animal welfare.
• Agriculture supply‑chain systems, national animal registers, veterinary practice, slaughterhouse and export/import checks.
• Manufacturers of RFID transponders and transceivers, conformity test laboratories, and national authorities that allocate national IDs and operate animal databases.

Who should use ISO 11784:2024

• RFID transponder manufacturers and suppliers
• Test laboratories and the Registration Authority (RA)
• National veterinary services, livestock registries, and agricultural ministries
• Integrators of animal identification and traceability systems

Related standards

• ISO 11785 - transmission protocols between transponder and transceiver
• ISO 14223 - advanced transponder characteristics (RUDI, extended data)
• ISO 15639 - injectable transponder placement and characteristics
• ISO 24631‑1 - conformance evaluation and granting/use of manufacturer codes
• ISO 3166 - country codes used for the CC field

Keywords: ISO 11784:2024, RFID for animals, animal identification, RFID code structure, transponder, country code (CC), manufacturer code (MFC), Registration Authority (RA), ISO 11785.