If there is anything other than a name that shows up on my caller ID, I will not answer. If you don't leave a message, you get blocked. You will run out of spoofed numbers eventually.
Scammer
1. Free Cruise.
2. Warranty Department,
3. Wireless Home Alarm.
4. Probably others.
Loser small time boiler room. Having $*x with animals during their breaks.
Ignore. Block.