NAAB-ICAR Stud Location Codes Guidelines



  1. In 1962, the National Association of Animal Breeders (NAAB) President Richard Kellogg proposed development of a uniform coding system for bulls in AI use. This system designated “NAAB Uniform Coding for Bull Studs” which identified the bull stud, breed and code number of the bull, was adopted by NAAB in 1965 with endorsement by the dairy records processing centers, USDA and breed registry associations.
  2. In 2014, NAAB entered into agreement with the International Committee for Animal Recording (ICAR) to maintain NAAB-ICAR Stud Location Codes, referred to hereafter as Stud Code(s), for international consistency and traceability.
  3. NAAB maintains the database of Stud Codes assigned by NAAB. This listing is available online ( or by request. The Stud Code system is the property of NAAB. These guidelines and the application and number assigning process grant only a limited license to use the code assigned, in accordance with the standards stated here, as they may be modified from time to time by the NAAB Board of Directors. ALL USE MUST BE IN COMPLIANCE WITH THESE GUIDELINES, AND ANY USE NOT IN COMPLIANCE MAY BE CAUSE FOR NAAB TO RESCIND A CODE NUMBER OR THE LICENSE TO USE NAAB’S STUD LOCATION CODE SYSTEM, OR REVOCATION OF MEMBERSHIP IF YOU ARE A NAAB REGULAR MEMBER.
  4. Administering this code numbering system, which is provided as a service to the AI industry, carries certain legal obligations for NAAB, and these guidelines and their enforcement represent attempts by NAAB to preserve the useful system that has developed and gained wide acceptance while also complying with applicable laws pertaining to trade practices. Anyone using or seeking to use this numbering system that has questions about it or about these guidelines is encouraged to contact NAAB.
  5. NAAB will accept applications for assignment of a Stud Code (Semen production and/or semen processing center number) which identifies the semen producing business and applicable subsidiary production or secondary processing locations. Application and supplemental information forms are available online ( or may be requested from NAAB.
  6. Prior to the assignment of a Stud Code, NAAB will determine to the best of its knowledge that the applicant is a bonafide “semen producing/collection/processing business.”
    The "semen collection center" is a specific facility for the collection of bull semen and should not be confused or replaced by the owner identification (ICAR International Agreement of Recording Practices, Section, June 2004).
    Artificial insemination center means a facility approved by the Veterinary Administration and which meets the conditions set out in this Terrestrial Code for the collection, processing and/or storage of semen (OIE Terrestrial Animal Health Code - 2005, Chapter 1.1.1. GENERAL DEFINITIONS, Article
  7. NAAB Stud Codes are assigned for a specific permitted purpose. NAAB retains control of each assigned Stud Code and may rescind use of a Stud Code or a user’s license to use NAAB’s Stud Codes if it determines the Stud Code is being used improperly. Reference At least annually, NAAB will determine any codes not in active use or not being used in accordance with these guidelines. Such codes will be rescinded, and thereafter any use of such numbers is prohibited unless NAAB specifically grants permission in writing and in advance. Inactive is defined as non-use for one year or assigned to a facility that is no longer collecting and processing semen.
  8. NAAB will determine the number to be assigned (generally the next available consecutive number).
  9. NAAB stud codes are not transferable unless NAAB specifically grants permission in writing and in advance.
  10. All NAAB Uniform codes assigned by your organization to dairy or beef bulls must be reported to NAAB as per the NAAB Uniform Code Guidelines. Timely reporting of assigned NAAB Uniform Code numbers is a condition of use of this license.
  11. When a semen producing business/semen collection center (processing organization) provides custom freezing services to another semen producing business/semen collection center that owns or leases the bull being custom collected (controlling organization), it is permitted to print the NAAB Uniform Code of the controlling organization on the straw as long as the Stud Code of the processing organization is also printed on the straw separate from the Uniform Code and standing alone.
  12. NAAB-ICAR Stud Code Number - Charges
    • For stud codes assigned after September 15, 2005
    • $500 USD One-time application Fee
    • $100 USD Annual usage fee
    • For stud codes assigned before September 14, 2005
    • $100 USD Annual usage fee

Revised January 27, 2020