Who called from 7604702631

Does anyone know who this is? They call several times a week but will not identify themselves. We have repeatedly asked to be removed from their list (whatever list that may be...)

Called during dinner. Caller ID said "Cell Phone, CA" I don't know anyone by that name. Didn't answer. They didn't leave a message. Blocked the number.

Sales call for solar energy.  I told them I was on the do-not-call list, they said they didn't care.

Call back gets, "the number you have dialed is not a working number."  So the number is spoofed.  That spells SCAM.  Block it.