Seems weird from France. Same time every night

Yes it is a scam where you ring back, they hold you online for ages and somehow get paid the money you use to ring them

There is a similar number 33 825 931 341, block both. Did not call back

Caller: Unknown

Same number originating from France and then Australia the next day. Will get called from this number and other numbers where the last 3 digits are different. Phone will only ring for a second or two and then hang up.

called 3 rings, and keeps on ringing

This is part of a scam network... do not call back or you'll incur heavy costs.