I just rented a car from Enterprise and started getting spam calls like this one. I believe it is related to renting a car from Enterprise as it's the first time I've given out this phone number (it is totally private).
Random calls daily, no message. Originates in Missouri. Called back for a pre-recorded message. It is a company called "Merits Research." Claims they are not telemarketers, which we all know they are, but that they are a legal market research company. Sure you are. Their DO NOT CALL LIST phone number is: 1-800-864-8601. Also automated, and you type in your number to have removed in up to 3 business days.