Has anybody else had any experience with this number?

My guess is it's the "duct cleaning" scumbags at it again with a new number for 2016.  I have three previous "240-720-XXXX numbers (3462, 3487, 3534) and they all turned out to be these low-life thieves offering to clean your HVAC ducts, when in fact the only cleaning they have in mind is to clean out your bank account.

Just interested if anybody else has been called by this number, or am I just lucky on the first official business day of the new year!

I think it is the duct cleaners.  No message left.  I Googled the number and found it listed as "Duct cleaning" on another website.  It's nobody that I know, so it's now blocked.