402-464-7509 likes to be a nuisance. Call and play with them.

I received seven calls in forty minutes from this number: 402-464-7509.

After the first no-breather, I didn't pick up the others. They rang long enough to get the machine and then hung up. I googled the number and got pages of complaints.

"(402) 464-7509 is a land line based in Lincoln, NE
The registered service provider is Windstream Nebraska.
N. Country Windows
Detailed listing information is not available."

Whoever it is has protection from not getting the number disabled yet still has plenty of time to randomly dial people--even those on the Do Not Call list.
Those who have gotten a person write that he claimed "the DNC list doesn't apply [to them]".

402-464-7509 Spread the number around. They clearly want the attention, so have fun!