Hi! I may need to contact a small local Class D airport for an approval on the edge of approach that has a 300' grid on AirMap - I only need at most 100'. They do not have LAANC available at this airport. This is a new one for me, as I have always had LAANC available for our bigger Class C airport, and so I have never had to actually contact a tower. Where do you go for phone numbers to contact? I don't have any pf the books, like AIM, that some of you may have and I won't have a radio with me. And please, I'm still learning practical parts of working within Part 107, so take it easy on me. Thank you!