ISO 3166-2:TD

ISO 3166-2:TD is the entry for Chad in ISO 3166-2, part of the ISO 3166 standard published by the International Organization for Standardization, which defines codes for the names of the principal subdivisions of all countries coded in ISO 3166-1.
Currently for Chad, ISO 3166-2 codes are defined for 23 provinces.
Each code consists of two parts, separated by a hyphen. The first part is, the ISO 3166-1 alpha-2 code of Chad. The second part is two letters.

Current codes

Subdivision names are listed as in the ISO 3166-2 standard published by the ISO 3166 Maintenance Agency.
ISO 639-1 codes are used to represent subdivision names in the following administrative languages:

''Click on the button in the header to sort each column.''

The following changes to the entry have been announced by the ISO 3166/MA since the first publication of ISO 3166-2 in 1998. ISO stopped issuing newsletters in 2013.

Newsletter	Date issued	Description of change in newsletter	Code/Subdivision change
		Modification of the administrative structure	Subdivision layout: 14 prefectures ' → 18 regions
		Update of the administrative structure and languages and update of the list source	Subdivisions added: Bahr el Gazel Borkou Ennedi Sila Tibesti Subdivisions deleted: Borkou-Ennedi-Tibesti
	2014-11-03	Add two regions TD-EE and TD-EO; correct spelling of TD-BA; delete TD-EN; update List Source	Subdivisions added: Ennedi-Est Ennedi-Ouest Subdivision deleted: Innīdī, Ennedi Spelling change: Al Baṭḩah → Al Baţḩah
	2020-11-24	Change of subdivision category region to province; Modification of spelling for TD-BA, TD-LO, TD-LR, TD-TA, TD-WF in ara; Addition of local variation for TD-BG in fra; Addition of subdivision name of TD-EE, TD-OE in ara; Update List Source	Spelling changes:''' Al Baţḩah → Al Baţḩā’ Lūqūn al Gharbī → Lūghūn al Gharbī Lūqūn ash Sharqī → Lūghūn ash Sharqī Tānjilī → Tānjīlī Wādī Fīrā → Wādī Fīrā’

Note: Many of the former prefectures share the same code and name with the current regions.