https://www.ideeslibres.org/Codes-Postaux/codes-postaux-geofla-agrege.csv.zip

https://data.opendatasoft.com/explore/dataset/code-postal-code-insee-2015%40public/information/?refine.insee_com=49023&location=6,44.65302,-0.42847&basemap=jawg.streets&dataChart=eyJxdWVyaWVzIjpbeyJjb25maWciOnsiZGF0YXNldCI6ImNvZGUtcG9zdGFsLWNvZGUtaW5zZWUtMjAxNUBwdWJsaWMiLCJvcHRpb25zIjp7InJlZmluZS5pbnNlZV9jb20iOiI0OTAyMyJ9fSwiY2hhcnRzIjpbeyJhbGlnbk1vbnRoIjp0cnVlLCJ0eXBlIjoiY29sdW1uIiwiZnVuYyI6IkFWRyIsInlBeGlzIjoieF9jaGZfbGlldSIsInNjaWVudGlmaWNEaXNwbGF5Ijp0cnVlLCJjb2xvciI6IiMxNDJFN0IifV0sInhBeGlzIjoiaW5zZWVfY29tIiwibWF4cG9pbnRzIjo1MCwic29ydCI6IiJ9XSwidGltZXNjYWxlIjoiIiwiZGlzcGxheUxlZ2VuZCI6dHJ1ZSwiYWxpZ25Nb250aCI6dHJ1ZX0%3D


https://www.ideeslibres.org/blog/2013/12/24/carte-des-codes-postaux-reconstituee-grace-a-service-public-fr/

https://data.opendatasoft.com/explore/dataset/code-postal-code-insee-2015%40public/