Repeated calls from this number with only a beep when answered. Calling the number back resulted in a recorded message identifying the company as Survey Sampling (www.surveysampling,com). Their web site directed that in order to opt out, an email should be sent to
[email protected] with the request to opt out and the phone number to exclude. Since they already had my number, I complied, using a blind email account. Remains to be seen whether or not it will be effective.