Hi, We just received 100.42.32.0/20 from ARIN. According to ARIN, this block was received from IANA in November 2010 and was issued to us in November 2011. Since we started using it, we have seen many problems with different Geo-IP providers incorrectly classifying the block - both location and provider wise (lots of them think this is Verizon space for some reason in both Canada and Kansas). I have followed http://nanog.cluepon.net/index.php/GeoIP and contacted most of these providers already. Not one has returned my email/inquiry. The main problem that I am seeing is that Verizon/UUNET is filtering access to some of their networks from 100.42.32.0/20. We are currently unable to reach any of UUNET.net's authoritative DNS servers (198.6.1.83, 198.6.1.161, etc) and appear to be filtered by some Verizon Business/UUNET routers. $ traceroute 198.6.1.83 traceroute to 198.6.1.83 (198.6.1.83), 30 hops max, 40 byte packets 1 209.65.192.129 (209.65.192.129) 1.491 ms 1.716 ms 1.942 ms 2 vl41-irtr1.dan100.net.kywimax.com (209.65.192.45) 0.551 ms 0.582 ms 0.587 ms 3 rrcs-173-197-155-189.west.biz.rr.com (173.197.155.189) 0.474 ms 0.519 ms 0.505 ms 4 ae8.chcgill3-rtr1.kc.rr.com (65.28.199.197) 20.349 ms 20.340 ms 20.409 ms 5 ae-5-1.cr0.chi30.tbone.rr.com (66.109.6.112) 20.243 ms 20.235 ms 20.223 ms 6 107.14.17.147 (107.14.17.147) 27.982 ms 27.567 ms 27.540 ms 7 216.156.72.165.ptr.us.xo.net (216.156.72.165) 20.945 ms te1-2-0d0.cir1.chicago2-il.us.xo.net (216.156.72.5) 20.920 ms 216.156.72.157.ptr.us.xo.net (216.156.72.157) 20.912 ms 8 (204.255.168.97) 20.868 ms 20.826 ms 20.910 ms 9 (152.63.66.77) 36.133 ms 36.243 ms 36.233 ms 10 (152.63.43.109) 45.859 ms 45.853 ms 45.843 ms 11 (152.63.38.9) 45.177 ms 45.175 ms 45.168 ms 12 * * * 13 * * * 14 * (207.18.173.162) 46.105 ms !X * (pos5-0.soesr1.ash.ops.us.uu.net) I have contacted VZW Business' IP-NOC and was not really given a contact that could help me with this situation. I have also emailed filters@lists.verizonbusiness.com and I'm awaiting a response (hopefully). Would anyone happen to have an idea of why I am seeing so many problems with this block, and who I may be able to reach out to at VZB to hopefully get this issue resolved? Thanks.