Left this message on my voicemail:

Cleaned out a great price right now. I'll steam clean 2 rooms of carpeting for just $49 are cleaning process is fast drying and 100% safe for kids or animals, and we also clean upholstery area rugs drapery and tile floors because you've been kind enough to listen to my message. I'll clean the hallways for free. I just wanted chance to add you to a growing list of satisfied customers who appreciate good service at our great price. Please press 1 to make an appointment?
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Carpetmaster carpetbaggers    BLOCKED IT  Starts off with a robo call

Carpet cleaning!! Omg my number is on the DNC list. But I guess that doesn't matter. This phone call has been going on for about a year and a half. Why has nothing been done about them calling people that are on the DNC list??? Not cool!! This number with this forum is getting reported. I think it was carpet masters.

Looks like phone spammer has switched their caller ID from Carpet Cleaning to "Roofing", which is what my phone showed.  Otherwise same info as other posters - unsolicited robo-call, never leaves a message.  Keep on blocking!

Call from +1 (720) 440-5830, location Denver, Colorado.    Answered and listened to recorded message advertising carpet cleaning. Decided to press one to investigate, this was the prompt to make an appointment. I was suspicious. The call hung up. This is obviously an unwarranted and sketchy number.