This number is sold to different companies as a pool of numbers available for bill collectors to use as a blind for caller ID. Meaning it is used to make a bill collector or spam caller look like they are a local entity, when they could actually be anywhere in the world. Verizon makes money covering the tracks of potential spammers, and criminals. If they sell it to a Dept Collector, though it's not cool, it's your fault their calling. Pay Your Bills!
Full Disclosure: I used a VPN to cover my tracks.