Car. I do not understand the question.
At any time with a decent aviation GPS you can look at the “nearest”pages.
I think Garmin has nearest ARTC amongst others.
On a flight from tls to gdo I would imagine the nearest function would show four or five different frequencies depending on your location at the time.
It’s primarily of use if you want to call to get flight following or wx info.
As I have mentioned many times the frequency boundaries on charts are not primarily designed on low level VHF coverage but for ATC workload and other purposes.