BLOCK this number. A couple of [***] spoof numbers. They work out of an apartment in the south end. Meth freaks.

Called, left no message.

claimed to be from some organization called California Clean Air Centers?  They addressed me by my last name.  I hung up.

Cystal and Jimmy from "California Clean Air" addressing me by my last name.  They stated their address was 1532 Sandhill Rd., West Menlo Park, CA.  There is no such place in West Menlo Park.  The address also maps to Stanford Student Housing in Palo Alto.  These scammers insist they are legit, but they are not.  Report to FTC:
http://www.consumer.ftc.gov/articles/0076-phone-scams

Help Consumer's Union to get the phone companies to stop these robocalls by signing their petition.  There is a donation button but you don't have to donate.

https://consumersunion.org/end-robocalls/