I have three missed calls from numbers starting with 1-415-626-xxxx. They are: 1-415-626-8210, 1-415-9651, and 1-415-626-4832.

I called back all three numbers but they all just rang endlessly. I'm waiting for a few calls -- Covered California, UPS, some business contacts -- but none would have, I think, the SF area code and instead be either 800 numbers (in the case of CC and UPS) or numbers from SoCal or east bay. (as that is where my business contacts are located)