Both the
AAA site or
Furkot can do this. Neither is a simple task. Both are free and online, so are useless for us as we tend to travel on a whim a lot of the time.
Also as we can afford satellite internet, we are out of cell range a lot of the time. I don't mean 4G, I mean 1X and that is with an external high mounted antenna and a 3 watt repeater.
The old Street Atlas was really good at this if you had the right overlays loaded, but that is a time long gone. The last real up of SA was 2013 and there is a lot that has changed in 6 years.
Matt