ISO 3166-2:EC is the entry for Ecuador in ISO 3166-2, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), which defines codes for the names of the principal subdivisions (e.g., provinces or states) of all countries coded in ISO 3166-1.
Currently for Ecuador, ISO 3166-2 codes are defined for 24 provinces.
Each code consists of two parts, separated by a hyphen. The first part is EC, the ISO 3166-1 alpha-2 code of Ecuador. The second part is one or two letters, currently used in vehicle registration plates, with a few exceptions.
Current codes 
Subdivision names are listed as in the ISO 3166-2 standard published by the ISO 3166 Maintenance Agency (ISO 3166/MA).
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|EC-SD||Santo Domingo de los Tsáchilas|
The following changes to the entry have been announced in newsletters by the ISO 3166/MA since the first publication of ISO 3166-2 in 1998:
|Newsletter||Date issued||Description of change in newsletter||Code/Subdivision change|
|Newsletter I-4||2002-12-10||Addition of one province||Subdivisions added:
|Newsletter II-2||2010-06-30||Update of the administrative structure and of the list source||Subdivisions added:
EC-SE Santa Elena
EC-SD Santo Domingo de los Tsáchilas
See also 
- Provinces of Ecuador, Statoids.com