Got a call today from this number. There is no "133" exchange in any area code in the USA.
Therefore the number is spoofed.

I am in the 512 area code.

I was not inside the house to take the call, the length shows they let it ring 2 times.
No message on Voice Mail.

Name                           Number               When              Length
NAME NOT FOUND    737-133-7458     Fri, 4:06 PM     0:10

Now for the interesting part. Five hours earlier, I got a call from 512-133-7458
which is also an impossible number. Scammer is using the same last 7 digits (for a non-existent exchange), and is changing the area code. I wonder if this is happening in other area codes.