This is a known spammer by the name of Ryan Lenahan who's been busted for SMS spam by the FTC. He's now spamming using an autodialer to his stolen data/customer list.
There is no stopping these calls..even if you complain because they are not calling to talk to you.
This is a caller confirmation system. All it is doing is taking 10's of hundreds of thousands of numbers and dialing each one and waiting for an answer (even a voicemail) and then it disconnects and moves on.
Once they have gotten all of the 'live' phone numbers, they sell this (usually on a CD) to many different telemarketing companies...and
Bada Bing, Bada Boom...in a day or two, you are getting again a whole raft of ... telemarketing calls because they know that you are a live number.
Block this number, dont matter, they will just change their outgoing number and start again.
So just live with it. Getting mad is getting you no where, and complaining is getting you no where.
I have now over 100 blocked # from different telemarketing companies, and they will never stop...Trust Me!!