This seems like an incoming fax sound. Get it many times a day. I work in a Call Center and it is very annoying. Can't it be disconnected?
March 12, 2021
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Keeps calling every 5 minutes with no contact, just silent or beeping.
January 21, 2020
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Do Not Call and Robocall Complaints
FTC Data
At least 7 consumers from Minnesota, California, Illinois, Missouri, Washington reported phone number 612-913-5153 to the Federal Trade Commission. 57% of complaints reported the call or text message as a robocall or recorded message. The last complaint was on June 29, 2021.
Complaints by State
Minnesota
3
-
California
1
Chester
Illinois
1
-
Missouri
1
Union
Washington
1
Spokane
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I have gotten a call from the number 612-913-5153 so far 5 times today. The information shows ENT TSO PROD MN. We don't answer our phone for unrecognized numbers unless they say something on the answering machine which states this. It is just a beep like a fax machine or something with no one talking. They call about every 5 minutes. I added the number to my blocked call list so at least I don't have to hear it but it still shows up.