"Can anyone confirm that these are indeed managed by the Chinese ISPs (even though they are physically located in the US according to the traceroute and RTT analysis)?"
If a router is part of the CU AS, it's owed and managed by them. Physical location isn't really relevant to your question. On Tue, Apr 16, 2019 at 8:53 AM Pengxiong Zhu <pzhu...@ucr.edu> wrote: > Howdy folks, > > We are a group of researchers at UC Riverside conducting some measurement > about transnational networks. In particular, we are interested in studying > the ownership of routers on the two sides of transnational links. > > We have some concrete questions which we hope someone can shed some light > on. Basically when we send packets from US/Canada to China, through > traceroute and the RTT of each hop, we can locate the last hop in the US > before the packets enter China (*there is a large jump of RTT of 100+ms > from this hop onwards*). Oftentimes the ownership of such routers is > ambiguous. > > These hops whose IPs seem to belong to US or European ISPs (*according to > BGP info*) but their reverse DNS names have *chinaunicom* in it, which is > a Chinese ISP. > AS1299 Telia Company AB > 62.115.170.57 name = chinaunicom-ic-341501-sjo-b21.c.telia.net. > 62.115.33.230 name = chinaunicom-ic-302366-las-bb1.c.telia.net. > 213.248.73.190 name = chinaunicom-ic-127288-sjo-b21.c.telia.net. > > AS701 Verizon Business > 152.179.103.254 name = chinaunicom-gw.customer.alter.net. > > While the following routers, they don't have a reverse DNS name at all, > which seem to be uncommon if they were managed by US or European ISPs but > quite common for Chinese ISPs. > AS6453 TATA COMMUNICATIONS (AMERICA) INC > 63.243.205.90 > 66.110.59.118 > > Can anyone confirm that these are indeed managed by the Chinese ISPs (even > though they are physically located in the US according to the traceroute > and RTT analysis)? > > > Best, > Pengxiong Zhu > Department of Computer Science and Engineering > University of California, Riverside >