Who called from 6104679999

Constant calls from this phone number.  No message ever left.  The number cannot be called--I get an error message--but it continues to call me multiple times per day.

Same thing.   Get Verizon Fios and you can enter up to 10 numbers to block.  Stops it immediately  :-)

Keep getting calls from this # . If i call back it says Sorry your call cannot be completed.
Nuisance.
Dan mentioned (over a year ago) to get Fios so can block upto 10 numbers! 10 is not sufficient. Need 20-30. Verizon charges monthly recurring fee to NOT display our number in public directoryy. If u dont pay that monthly fee, u get published and then u get gazillion money seeking, free holiday offering scam artists calling u day and night. HATE you VERIZON for that

I was poisoned by  by this number 610 467 9999 it was almost 10 pm.
Where and how can we complain formally?
Thank  you ;)