Transitional reserved code elements are codes reserved after their deletion from ISO 3166-1. These codes may be used only during a transitional period of at least five years while new code elements that may have replaced them are taken into use. These codes may be reassigned by the ISO 3166/MA after the expiration of the transitional period. The following alpha-2 codes are currently transitionally reserved:

The following alpha-2 code was previously transitionally reserved, but was later reassigned to another country as its official code:
தற்போதைய குறியீடுகள்
தற்காலிக குறியீடுகள்
விதிவிலக்கு குறியீடுகள்
Transitional reservations