> On Nov 17, 2020, at 1:06 AM, Jan Engelhardt <jengelh@xxxxxxx> wrote: > > > On Tuesday 2020-11-17 04:36, Philip Prindeville wrote: >> >> Many known blocks owned by Chinanet for instance, don’t show up as /11 or /13 >> networks, but as dozens of /23 networks instead in China, the US, Japan, and >> Canada. Clearly not correct. > > Do you have some sample netnumbers so that we can look at it from our side? Okay, sure. 212.174.0.0/15 supposedly is a single block of TurkTelecom, but the database shows it as being 296 subnets, mostly /23’s. 183.128.0.0/11 is supposedly a single block of Chinanet, but the database shows it as being 329 subnets (164 supposedly in the US), again mostly /23’s and /22’s: ... 183.136.192.0,183.136.193.99,CN 183.136.193.100,183.136.193.255,US ... I picked one of those US subnets and did a traceroute to it: % traceroute 183.136.193.100 traceroute to 183.136.193.100 (183.136.193.100), 30 hops max, 60 byte packets 1 openwrt.redfish-solutions.com (192.168.1.252) 0.397 ms 0.225 ms 0.355 ms 2 172.18.216.1 (172.18.216.1) 3.111 ms 2.756 ms 2.429 ms 3 ip-66-232-69-145.syringanetworks.net (66.232.69.145) 2.158 ms 1.897 ms 2.316 ms 4 * * * 5 be5991.rcr51.boi01.atlas.cogentco.com (38.122.5.5) 3.117 ms be4798.rcr51.boi01.atlas.cogentco.com (38.122.5.161) 2.688 ms be5991.rcr51.boi01.atlas.cogentco.com (38.122.5.5) 3.680 ms 6 be2541.ccr32.slc01.atlas.cogentco.com (154.54.3.121) 10.118 ms be2539.ccr21.slc01.atlas.cogentco.com (154.54.3.129) 10.236 ms 10.734 ms 7 be3110.ccr22.sfo01.atlas.cogentco.com (154.54.44.141) 25.536 ms 25.243 ms be3109.ccr21.sfo01.atlas.cogentco.com (154.54.44.137) 25.049 ms 8 be3670.ccr41.sjc03.atlas.cogentco.com (154.54.43.14) 27.162 ms 26.952 ms 26.714 ms 9 38.104.138.106 (38.104.138.106) 34.213 ms 33.847 ms 33.635 ms 10 202.97.50.73 (202.97.50.73) 29.346 ms 29.148 ms 29.460 ms 11 202.97.50.125 (202.97.50.125) 162.534 ms 162.206 ms 161.807 ms 12 202.97.90.30 (202.97.90.30) 157.568 ms 156.878 ms 156.387 ms 13 202.97.50.133 (202.97.50.133) 183.191 ms 182.953 ms 182.695 ms 14 202.97.82.18 (202.97.82.18) 183.290 ms 183.048 ms 182.813 ms 15 61.153.82.134 (61.153.82.134) 187.541 ms 222.4.175.61.dial.nb.zj.dynamic.163data.com.cn (61.175.4.222) 188.273 ms 61.153.82.134 (61.153.82.134) 188.029 ms 16 * * * 17 * * * 18 * * * ^C
