Received call from 1-209-459-2657 @ 11:54 AM PST 8/17/2016 with caller ID "Name Unavailabl" - No message left.

This is the 11th phone call I've received since Aug 5th  from Stockton 209 area code.

Other calls in this series  with caller ID "Name Unavailabl" or noted ID (also reported):
11:53 AM PST 8/12/2016 from 1-209-157-3719 - No message left.
11:33 AM 8/11/2016 from 1-209-234-4267 with caller ID "Lydia F"- No message left.
2:51 pm 8/10/2016 from 1-209-187-2014 - No message left. White Pages give this message: "We did not find a match. The subscriber number for the given number is invalid."
1:03 pm 8/9/2016 from 1-209-184-7562 - Hung up as soon as I answered "Hello".
10:59 am 8/9/2016 from  1-209-184-7562 (same as above) - No message left.
10:10 am 8/8/2016 from 1-209-053-6812 - No message left.
9:04 AM 8/5/2016 with caller ID "Ochoa Jonathan" from phone # 1-209-358-2576. Did not answer as I expected this to be spam or a spoofed number. No message left.
5:21PM 8/4/2016 from 1-209-166-8426 - Picked up and they immediately hung up after I said "Hello" twice
3:41PM 8/4/2018 from 1-209-155-8723 - no message left
12:41PM 8/4/2016 from 1-209-124-7896 - no message left