You will be surprised how often that will get you more information...often critical information.Second, if at all possible, try to get on the phone with the landlord prior to the current landlord. 

Still no word from him, until I called his phone and talked to him. 

You can also do a skiptrace to find their address and or phone number as well.

I'm open to phone calls, FaceTimes, and meetups—whatever works best!

As a real estate investor in Charlotte, I have worked with Allen Marshall at David Greens's One Brokerage.Allen's Phone is 707-481-8180.

Call from another phone and see if they answer. 

We then use whitepages.com account to look up phone numbers to call those owners (not always easy). 

They don’t have an app but works on my phone, iPad and computer all the same.

I'm using phone so hard to inspect via 1 picture.Hopefully it all works out for you.

It took me a letter, two phone calls, an in person meeting, and over an hour of explanation to get one of the previous homeowners up to speed.