I stopped getting calls from 408-520-7303 so I'm assuming they morphed to this number. There are patterns in the numbers they choose. For example, the prefix 320 and 520, and the use of repetitive numbers in the last four numbers, 7303 and 6136.
You'd think these criminals would give up on my number because I haven't answered a call from these scammers in 4 years.
Got call from this number and left a message about "political contribution". Sara's intuition may be right. Before this call, I got call several times from 408-520-7303, which I had blocked.