I started getting these calls about 2 months before I renewed my subscripton. Finally waited long enough to get a person who tried to sell me an MSDN renewal. The calls have not stopped even though I have renewed.
Yes, this is legit. They are from MSDN, however their automated dialer is very slow to connect to an operator. Indeed, I am an MSDN subscriber, yes it needed to be renewed, I did it online, but their system was slow to update. It's legit.