[thecodont]

Ran across this site.

Maybe you could check out a local city (plug in your state) and see how current it is?

Link for California is below:

https://www.payphone-project.com/numbers/usa/CA/

[minnesota_bound]

There are quite a few in Canoga Park, Calif
https://www.payphone-project.com/numbers/usa/CA/CANOGA_PARK/

Nearby Chatsworth
https://www.payphone-project.com/numbers/usa/CA/CHATSWORTH/

A majority of payphone locations listed on The Payphone Project no longer exist. This collection of payphone numbers and locations is kept online for historical purposes.