I know. But one layer below, there's still a chain linking back to the origin ISP. The DNS operator can ask his own ISP about it.
(Also, to people down-voting a genuine question ? wth..)
(Also, to people down-voting a genuine question ? wth..)
Who would then have to determine where it's coming into their network from, and go ask that ISP, who would have to do the same, ad nauseum. And all parties would have to be paying enough staff to handle that load in addition to, you know, making sure their services work.
- the DNS operator doesn’t care. These look like normal requests.
- if they did care, asking an ISP to packet trace ingress traffic is not trivial. At any large scale ISP there are hundreds to thousands of direct peers that could have originated that traffic.