ISO 3166-1 country codes

TD — Chad

TD is the ISO 3166-1 alpha-2 country code for Chad; the alpha-3 code is TCD and the numeric code is 148.

The name shown is the English name in Unicode CLDR; ISO's official short name can be worded differently.

Related codes

Peppol BIS Billing 3.0 — cac:CountryCode/cbc:IdentificationCode, cac:OriginCountry/cbc:IdentificationCode
Country codes in addresses and the item country of origin use ISO 3166-1 alpha-2 codes. Peppol's list follows the list extended by the European Commission's eInvoicing programme (CEF), which adds XI for Northern Ireland. XI is not an ISO 3166-1 code and is therefore not on this site's country list.
Sources: github.com: country.adoc, github.com: v3.0.11-hotfix.adoc, github.com: ISO3166-1_Alpha2.xml (primary, checked 2026-10-11)

These describe where the list as a whole is used. They do not mean that a particular code is accepted by a given system or validation rule.

Publisher: Unicode CLDR (codes defined by ISO)
Edition: CLDR 48.2.0
Source file: CLDR 48.2.0 (npm cldr-core, cldr-localenames-full, cldr-numbers-full 48.2.0)
Source type: Primary — published by the data owner
Licence: Unicode License v3 (CLDR). ISO does not publish ISO 3166 / ISO 4217 under an open licence. This list is taken from Unicode CLDR, which is openly licensed and carries the same codes. Names are CLDR English display names and can differ from ISO's official short names.
Imported: 2026-10-11