Who called from 5593875424

Same thing here, Rob - get calls from this number and CID shows CASS - suspect another  telemarketer (honest or dishonest) pushing something - most probably solar.  Very third of these calls.

Called 8/30 and again yesterday, 9/4. No messages left. That's it. Blocked.

They called today 9/28. No msg. Blocking it

Hung up like above.  Blocked

Called and didn't leave a message.  Caller ID shows up as "Cass".