from validnumber.com: PHONE INFORMATION
(317) 564-9491
(317) 564-9491 is a phone number on a Competitave Local Exchange Carrier device operated by BANDWIDTH.COM CLEC, LLC - IN. This device is registered in CARMEL, IN, which is located in Hamilton county.   Full Report >

Hope that helps...in otherwords, robocall. Can you block it (having an iPhone allows that easily).