I am having the exact same problem. Except this happens in multiple locations.
I don't make calls often but the few times I try it's baffling. I can use the data and text services.
I can call a landline number. Their phone will ring BUT I can't hear it ringing on my phone. It appears that nothing is happening on my end. When they pick up the phone they cannot hear me and I cannot hear them. I tried making calls to my folks phone while sitting in their living room while this happens.
I have to restart my phone (HTC One - M7) to get voice services again!!
This happens in the 95823 zip code, the 95814 zip code and 95827 zip code all in Sacramento county.