(503) 280 in Portland, OR

I receive repeated calls daily from numbers similar to this, all ID'd as "PORTLAND, OR". They have been told not to call back. My phone numbers are included in "Do Not Call Lists" but that doesn't help. I have more than 2400 such calls. I have checked reverse phone numbers and the ones listed as Portland are located around the city and may be initiated from homes rather than a call center Simply put, I feel I am being targeted and harassed,

Whoever is using this number is harassing my preteen niece on her phone. Threatening her