Geography and dialling codes aren’t necessarily aligned. So none of those countries share a border - it doesn’t mean there was never a weird issue with international dialling codes at some point (and, after I did a bit of searching, it seems that there was)

> none of those countries share a border

Precisely. That should give the reader pause to think that there's something wrong.

You're missing that the author mixed up Monaco with Montenegro (Kosovo's neighbour) because they sound similar. That's the perennial Austria/Australia confusion writ small.

There's no mixup.

Kosovo has numbers that are reachable through Monaco (not Kosovo's neighbour) country code.

Kosovo does not have numbers that are reachable through Montenegro (Kosovo's neighbour) country code.

I’m not missing anything. It sounded unusual, so I looked it up before posting :-D

Do you have a source for that?

Considering the US has states that are larger than those countries, can 4th year students from those countries fill in a map of all the US states?