Another sleazebag caller
They just keep trying different caller-ID's/phone numbers to see which ones people answer.
I note that there is a space after the CA. No matter. Both the displayed number and the name are blocked separately here, so it is blocked no matter what combination they use.
You can learn a lot by using a Caller-ID enabled modem, rather than a caller-ID enabled phone.
One of their favorite ploys is to use the letter "O" as the caller-id name.  Most caller-id phones will show this as "Unknown" or 'Name not found" or some such, since "O" is not in the phone's address book. I block "O" no matter what number it allegedly calls from. You can't do this with a blocking enabled phone. You have to use a modem and a program such as Callclerk.