The US is also somewhat unique (not the only country, but one of a few) in that we can port numbers between landline and mobile. Most places keep them separate.

I used this feature recently, after my mom passed. She had the same home number we grew up with, for fifty years. I ported it over as a second line on my mobile. Partly nostalgia (okay, mostly), partly because it was a pretty great number for memorization; it has an excellent number pattern.