They have called a couple of times a day and don't leave a message.
I have now saved this number to my phone as a junk call and it goes directly to voicemail.
This works great because they never leave a message.

Tonight the number 414-877-5693 was a scam for selling an ACT test-taking kit. Supposedly a 60-day free preview, supposedly ordered by my teenaged daughter seeking scholarship info. They gave me a Priority Mail confirmation number, saying it was ready to ship -- but, by the way, they needed credit-card info "just in case" she didn't return it in 60 days. Uhhhh...NOPE! (And daughter confirmed: she ordered no such thing...) Guy kept referencing fastweb.com and scholarships.com to sound legit. As FastWeb itself says: http://www.fastweb.com/college-scholarships/articles/54-10-scam-warning-signs