The current registrars for ".ai" are below and growing fast:
  1. 101domain.com
  2. instra.com
  3. marcaria.com
  4. nameaction.com
  5. idcicp.com
  6. quyu.net
  7. markmonitor.com
  8. 1api.net
  9. ai-domain.com
  10. zhuce.ai
  11. EPAG Domainservices GmbH
  12. EU Technology(HK) Limited
  13. Domain Club
  14. bNamed.net
  15. Tool Domains
  16. Nameshield
  17. 007Names
  18. Netz0
  19. zenaida.cate.ai Bitcoin only

    To be on this list a registrar just has to handle ".ai" registrations, renewals, and transfers (in and out).