Install this Plugin
Use the data action "Get Data from an external API"

1.-Get a Free Token on the site https://api-sepomex.hckdrk.mx/usuarios/registro this is the API of the Official Mexican Postal Code Service.

2.- Install this plugin

3.- Use the data action "Get Data from an external API"

4.- Use any of the two avilable calls Mex-Get Estados would retive a list of the Mexicos States and SearchMethod+Query would accept multiple search methos and you would have to complete the query for example Method=info_cp and query=62040 would return the information about that postal code. Like Colonias, estado y municipio. All Methods are listed on the element documentation.