This number rang my cell phone today saying they are a security company and will be in the neighborhood and gave me only one option: press one for more info.
It did not give information such as company name or contact info or a way to opt out of their calls. So, I pressed "1" expecting to get connected with a human who I could tell not to call me anymore.
Instead, the phone disconnected.
I called the number back and got a recording saying that if I want to be placed on their Do Not Call list, to press one. I did. I then got a recording apologizing for the inconvenience and that I'd be removed within 48 hours.
2.5 hours later I got a phone call from another number 207-512-2299
) a live person this time offering me something about Home Security. See my comment under that phone number.