this is truely strange! I too have gotten atleast 5 calls from this # and can't pick up or call back...also a bunch of unknown just in the last week.
Wonder what it is?
I'm with you guys. Same number showed up on my cell. Invalid number, as you all stated, when I returned the call. I thought perhaps it could be an extension from 310-690-2900, but got the same response. Are these calls hitting your cells too, or is it home and cells?
If I don't recognize the number, I don't answer. If the caller is legitimate, they leave a message. If not, I google the number and when I've found a fair number of complaints, I make it a point to answer the call, wait 3 seconds and hang up. That way they have to pay for the call...