[hnarn]

Ceefax was shut down in 2012.[1] I have no idea about the Dutch one, it's possible that it's older.

edit: According to this site[2] the Dutch teletext was broadcast "on the open network" on April 1, 1980. There's also a Swedish source claiming that Swedish Text-TV is the oldest in the world.[3]

[1]: https://www.bbc.com/news/uk-20032882

[2]: https://over-nos-nl.translate.goog/organisatie/geschiedenis-...

[3]: https://sverigesradio.se/avsnitt/1216116 "idag har faktiskt Sverige världens äldsta ännu aktiva Text-TV"