no clue either

i got a call from  415-363-5548 at 8:22pm 1/14/10 (GMT -05:00) eastern time (us& canada)

I got a call from that number too.  Don't know who.

I got a call 1/14/10 @ 5:45 Central time.  Has to be sales or something.

Caller Name: W.C.A. Offer Clearing House
Caller Type: Telemarketing Company
Caller Telephone: +1 (415) 363-5548

When returning call: "You have reach the automated number removal line, please press 1 to remove you number from the database."

Upon pressing 1: "Please enter your telephone number, area code first".

Upon entering phone number: "You're number has been removed from our database, Goodbye."