I am getting regular calls from this number.  No ID, no message.

The number an air duct cleaning company. After I press #1 on their system the recording offered me duct cleaning for $19.95 which is too good to be true. It usually costs around $200-$300. Those company will go in and ruin your ducts so they can get more work from all the repairs needed to be done. They carry around fecal matter of animals, like rats and they will blame the rats for the problems with the duct. You would eventually spend thousands of dollars on repairing the mess they made.

To replace their air duct, they will offer you deep cleaning for your coil for $500-$1000 and they won't know how to assemble it back.

Just for your knowledge most of the duct company are not air-conditioning license. Make sure that when you hire a duct cleaning company that they have HVAC license, so they know what their doing.

This is the reason why they don't want the customers to know their phone number.

Just tell them you are recording the call and ask for them to repeat their company name and their name.  They will hang up on you before you have a chance to finish your sentence and most likely will not call you again.

calls but no message

I just got a call from this number I get calls like this all day long, I can only block 20 numbers for free on my answer machine is there a phone out there that allows more calls to be blocked without paying for a service?
Also someone made a point we should just not answer which they are right but to just not answer you have to go look and see who it is and by that time they have interrupted what you were doing and your focus now becomes stupidly or not  all about who the hell is calling me and why? I think I am going to try and set an appt up that is a great idea! Thanks..