[0] 0.99.52.117.in-addr.arpa.: domain name does not exist
[0] 1.99.52.117.in-addr.arpa.: domain name does not exist
[0] 2.99.52.117.in-addr.arpa.: domain name does not exist
[0] 3.99.52.117.in-addr.arpa.: domain name does not exist
[0] 4.99.52.117.in-addr.arpa.: domain name does not exist
[0] 5.99.52.117.in-addr.arpa.: domain name does not exist
[0] 6.99.52.117.in-addr.arpa.: domain name does not exist
[0] 7.99.52.117.in-addr.arpa.: domain name does not exist
[0] 8.99.52.117.in-addr.arpa.: domain name does not exist
[0] 9.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 10.99.52.117.in-addr.arpa. domain name pointer ekorean.cuk.edu ekorean.cyberkorea.ac.kr ecamp.cuk.edu
[3600] 11.99.52.117.in-addr.arpa. domain name pointer dr-dns02.mycuk.ac.kr ns1.mycuk.kr ns1.krcu.ac.kr
[0] 12.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 13.99.52.117.in-addr.arpa. domain name pointer idc-glms01.cuk.edu glms.cuk.edu glms.cyberkorea.ac.kr glms01.cuk.edu
[3600] 14.99.52.117.in-addr.arpa. domain name pointer glms02.cuk.edu
[0] 15.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 16.99.52.117.in-addr.arpa. domain name pointer ecamp01.cuk.edu
[3600] 17.99.52.117.in-addr.arpa. domain name pointer ecamp02.cuk.edu
[0] 18.99.52.117.in-addr.arpa.: domain name does not exist
[0] 19.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 20.99.52.117.in-addr.arpa. domain name pointer gwww.cuk.edu
[0] 21.99.52.117.in-addr.arpa.: domain name does not exist
[0] 22.99.52.117.in-addr.arpa.: domain name does not exist
[0] 23.99.52.117.in-addr.arpa.: domain name does not exist
[0] 24.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 25.99.52.117.in-addr.arpa. domain name pointer truview.cuk.edu fluke.cuk.edu
[0] 26.99.52.117.in-addr.arpa.: domain name does not exist
[0] 27.99.52.117.in-addr.arpa.: domain name does not exist
[0] 28.99.52.117.in-addr.arpa.: domain name does not exist
[0] 29.99.52.117.in-addr.arpa.: domain name does not exist
[0] 30.99.52.117.in-addr.arpa.: domain name does not exist
[0] 31.99.52.117.in-addr.arpa.: domain name does not exist
[0] 32.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 33.99.52.117.in-addr.arpa. domain name pointer dr-korean01.cuk.edu cukchoco1001.cuk.edu
[3600] 34.99.52.117.in-addr.arpa. domain name pointer dr-korean02.cuk.edu
[3600] 35.99.52.117.in-addr.arpa. domain name pointer racktable.cuk.edu mrtg.cuk.edu fresh.cuk.edu
[0] 36.99.52.117.in-addr.arpa.: domain name does not exist
[0] 37.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 38.99.52.117.in-addr.arpa. domain name pointer inb.cuk.edu
[3600] 39.99.52.117.in-addr.arpa. domain name pointer stgintra.cuk.edu group.cuk.edu
[0] 40.99.52.117.in-addr.arpa.: domain name does not exist
[0] 41.99.52.117.in-addr.arpa.: domain name does not exist
[0] 42.99.52.117.in-addr.arpa.: domain name does not exist
[0] 43.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 44.99.52.117.in-addr.arpa. domain name pointer dr-kvm09.sys.cuk.edu
[0] 45.99.52.117.in-addr.arpa.: domain name does not exist
[0] 46.99.52.117.in-addr.arpa.: domain name does not exist
[0] 47.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 48.99.52.117.in-addr.arpa. domain name pointer gmng01.cuk.edu gwww01.cuk.edu iis01.cuk.edu
[3600] 49.99.52.117.in-addr.arpa. domain name pointer idc-gwww02.cuk.edu gmng02.cuk.edu gwww.cyberkorea.ac.kr iis02.cuk.edu gmng.cuk.edu gwww02.cuk.edu
[3600] 50.99.52.117.in-addr.arpa. domain name pointer cmsgo.cuk.edu www.cuk.edu ems.cuk.edu tempgo.cuk.edu mnglix.cuk.edu neorep.cuk.edu club.cuk.edu mngems.cuk.edu ams.cuk.edu neotest.cuk.edu lix.cuk.edu neoexam.cuk.edu go.cuk.edu
[0] 51.99.52.117.in-addr.arpa.: domain name does not exist
[0] 52.99.52.117.in-addr.arpa.: domain name does not exist
[0] 53.99.52.117.in-addr.arpa.: domain name does not exist
[0] 54.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 55.99.52.117.in-addr.arpa. domain name pointer exercise.cuk.edu
[3600] 56.99.52.117.in-addr.arpa. domain name pointer g20.cuk.edu.cuk.edu g20.cuk.edu
[0] 57.99.52.117.in-addr.arpa.: domain name does not exist
[0] 58.99.52.117.in-addr.arpa.: domain name does not exist
[0] 59.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 60.99.52.117.in-addr.arpa. domain name pointer dist.cuk.edu img.cuk.edu img.cyberkorea.ac.kr
[0] 61.99.52.117.in-addr.arpa.: domain name does not exist
[0] 62.99.52.117.in-addr.arpa.: domain name does not exist
[0] 63.99.52.117.in-addr.arpa.: domain name does not exist
[0] 64.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 65.99.52.117.in-addr.arpa. domain name pointer korean01.cuk.edu nkorean01.cuk.edu
[3600] 66.99.52.117.in-addr.arpa. domain name pointer korean02.cuk.edu nkorean02.cuk.edu
[0] 67.99.52.117.in-addr.arpa.: domain name does not exist
[0] 68.99.52.117.in-addr.arpa.: domain name does not exist
[0] 69.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 70.99.52.117.in-addr.arpa. domain name pointer stream.cuk.edu gstream.cuk.edu stream.cyberkorea.ac.kr
[3600] 71.99.52.117.in-addr.arpa. domain name pointer dr-vod01.cuk.edu stream01.cuk.edu gstream01.cuk.edu
[3600] 72.99.52.117.in-addr.arpa. domain name pointer dr-vod02.cuk.edu stream02.cuk.edu gstream02.cuk.edu
[3600] 73.99.52.117.in-addr.arpa. domain name pointer dr-vod03.cuk.edu stream03.cuk.edu gstream03.cuk.edu
[3600] 74.99.52.117.in-addr.arpa. domain name pointer dr-vod04.cuk.edu gstream04.cuk.edu stream04.cuk.edu
[0] 75.99.52.117.in-addr.arpa.: domain name does not exist
[0] 76.99.52.117.in-addr.arpa.: domain name does not exist
[0] 77.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 78.99.52.117.in-addr.arpa. domain name pointer devneoexam.cuk.edu lmslix.cuk.edu devneorep.cuk.edu devintra.cuk.edu devdist.cuk.edu
[0] 79.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 80.99.52.117.in-addr.arpa. domain name pointer eval.cuk.edu
[0] 81.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 82.99.52.117.in-addr.arpa. domain name pointer jennifer.cuk.edu jennifer5.cuk.edu
[3600] 83.99.52.117.in-addr.arpa. domain name pointer lixdb01.cuk.edu
[3600] 84.99.52.117.in-addr.arpa. domain name pointer club01.cuk.edu lixwas01.cuk.edu neoexam01.cuk.edu lix01.cuk.edu cmsgo01.cuk.edu ams01.cuk.edu www01.cuk.edu was01.cuk.edu neorep01.cuk.edu ems01.cuk.edu
[3600] 85.99.52.117.in-addr.arpa. domain name pointer ems02.cuk.edu neoexam02.cuk.edu ams02.cuk.edu cmsgo02.cuk.edu www02.cuk.edu lixwas02.cuk.edu was02.cuk.edu club02.cuk.edu lix02.cuk.edu neorep02.cuk.edu
[3600] 86.99.52.117.in-addr.arpa. domain name pointer lmslix.cuk.edu neoexam03.cuk.edu cmsgo03.cuk.edu club03.cuk.edu www03.cuk.edu lixwas03.cuk.edu was03.cuk.edu neorep03.cuk.edu lix03.cuk.edu ams03.cuk.edu ems03.cuk.edu
[0] 87.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 88.99.52.117.in-addr.arpa. domain name pointer ebox.cuk.edu support.cuk.edu systool.cuk.edu
[0] 89.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 90.99.52.117.in-addr.arpa. domain name pointer korean.cuk.edu nkorean.cuk.edu
[0] 91.99.52.117.in-addr.arpa.: domain name does not exist
[0] 92.99.52.117.in-addr.arpa.: domain name does not exist
[0] 93.99.52.117.in-addr.arpa.: domain name does not exist
[0] 94.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 95.99.52.117.in-addr.arpa. domain name pointer vodupload.cuk.edu msdn.cuk.edu
[0] 96.99.52.117.in-addr.arpa.: domain name does not exist
[0] 97.99.52.117.in-addr.arpa.: domain name does not exist
[0] 98.99.52.117.in-addr.arpa.: domain name does not exist
[0] 99.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 100.99.52.117.in-addr.arpa. domain name pointer sso.cuk.edu
[0] 101.99.52.117.in-addr.arpa.: domain name does not exist
[0] 102.99.52.117.in-addr.arpa.: domain name does not exist
[0] 103.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 104.99.52.117.in-addr.arpa. domain name pointer vappweb01.cloudlab.ac.kr
[3600] 105.99.52.117.in-addr.arpa. domain name pointer vappweb02.cloudlab.ac.kr
[0] 106.99.52.117.in-addr.arpa.: domain name does not exist
[0] 107.99.52.117.in-addr.arpa.: domain name does not exist
[0] 108.99.52.117.in-addr.arpa.: domain name does not exist
[0] 109.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 110.99.52.117.in-addr.arpa. domain name pointer vapp.cuk.edu vapp.cloudlab.ac.kr
[0] 111.99.52.117.in-addr.arpa.: domain name does not exist
[0] 112.99.52.117.in-addr.arpa.: domain name does not exist
[0] 113.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 114.99.52.117.in-addr.arpa. domain name pointer vapp01.cloudlab.ac.kr
[3600] 115.99.52.117.in-addr.arpa. domain name pointer vapp02.cloudlab.ac.kr
[3600] 116.99.52.117.in-addr.arpa. domain name pointer vapp03.cloudlab.ac.kr
[3600] 117.99.52.117.in-addr.arpa. domain name pointer vapp04.cloudlab.ac.kr
[3600] 118.99.52.117.in-addr.arpa. domain name pointer vapp05.cloudlab.ac.kr sms01.cuk.edu sms.cuk.edu
[3600] 119.99.52.117.in-addr.arpa. domain name pointer sms02.cuk.edu
[0] 120.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 121.99.52.117.in-addr.arpa. domain name pointer dr-vmw01.sys.cuk.edu dr-vmw01.cuk.edu
[3600] 122.99.52.117.in-addr.arpa. domain name pointer dr-vmw02.cuk.edu dr-vmw02.sys.cuk.edu
[0] 123.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 124.99.52.117.in-addr.arpa. domain name pointer pfilter.cuk.edu
[0] 125.99.52.117.in-addr.arpa.: domain name does not exist
[0] 126.99.52.117.in-addr.arpa.: domain name does not exist
[0] 127.99.52.117.in-addr.arpa.: domain name does not exist
[0] 128.99.52.117.in-addr.arpa.: domain name does not exist
[0] 129.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 130.99.52.117.in-addr.arpa. domain name pointer library.cuk.edu
[0] 131.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 132.99.52.117.in-addr.arpa. domain name pointer vms.cuk.edu
[3600] 133.99.52.117.in-addr.arpa. domain name pointer sso01.cuk.edu
[3600] 134.99.52.117.in-addr.arpa. domain name pointer sso02.cuk.edu
[0] 135.99.52.117.in-addr.arpa.: domain name does not exist
[0] 136.99.52.117.in-addr.arpa.: domain name does not exist
[0] 137.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 138.99.52.117.in-addr.arpa. domain name pointer neoplag.cuk.edu
[0] 139.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 140.99.52.117.in-addr.arpa. domain name pointer cms.cuk.edu
[3600] 141.99.52.117.in-addr.arpa. domain name pointer ad01.cuk.edu
[0] 142.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 143.99.52.117.in-addr.arpa. domain name pointer ns.krcu.ac.kr dns01.cloudlab.ac.kr ns.cyberkorea.ac.kr idc-dns01.mycuk.ac.kr dns01.cuk.edu idc-dns01.krcu.ac.kr idc-dns01.virtuallab.ac.kr
[0] 144.99.52.117.in-addr.arpa.: temporary failure in name resolution
[3600] 145.99.52.117.in-addr.arpa. domain name pointer spamout.cuk.edu
[3600] 146.99.52.117.in-addr.arpa. domain name pointer smtp2.cuk.edu spam.cuk.edu smtp.cuk.edu
[3600] 147.99.52.117.in-addr.arpa. domain name pointer oldmail.cuk.edu kmail.cuk.edu kdu-mail-01.cuk.edu webmail.cuk.edu export.cuk.edu
[3600] 148.99.52.117.in-addr.arpa. domain name pointer nwww01.cuk.edu.cuk.edu nwww01.cuk.edu grad01.cuk.edu eng01.cuk.edu rci01.cuk.edu
[3600] 149.99.52.117.in-addr.arpa. domain name pointer grad02.cuk.edu eng02.cuk.edu rci02.cuk.edu nwww02.cuk.edu
[3600] 150.99.52.117.in-addr.arpa. domain name pointer report.cuk.edu
[3600] 151.99.52.117.in-addr.arpa. domain name pointer report01.cuk.edu.cuk.edu report01.cuk.edu
[3600] 152.99.52.117.in-addr.arpa. domain name pointer report02.cuk.edu
[3600] 153.99.52.117.in-addr.arpa. domain name pointer nredmine.cuk.edu
[0] 154.99.52.117.in-addr.arpa.: domain name does not exist
[0] 155.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 156.99.52.117.in-addr.arpa. domain name pointer pki02.cuk.edu
[0] 157.99.52.117.in-addr.arpa.: domain name does not exist
[0] 158.99.52.117.in-addr.arpa.: domain name does not exist
[0] 159.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 160.99.52.117.in-addr.arpa. domain name pointer certi.cuk.edu
[3600] 161.99.52.117.in-addr.arpa. domain name pointer edu.cuk.edu choongang.cuk.edu kd.cuk.edu gallery.cuk.edu fund.cuk.edu edu1.cuk.edu
[3600] 162.99.52.117.in-addr.arpa. domain name pointer mail.cuk.edu
[3600] 163.99.52.117.in-addr.arpa. domain name pointer teamcode.cuk.edu
[0] 164.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 165.99.52.117.in-addr.arpa. domain name pointer vc.cuk.edu
[3600] 166.99.52.117.in-addr.arpa. domain name pointer idc-plag01.cuk.edu plag.cyberkorea.ac.kr
[0] 167.99.52.117.in-addr.arpa.: domain name does not exist
[0] 168.99.52.117.in-addr.arpa.: domain name does not exist
[0] 169.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 170.99.52.117.in-addr.arpa. domain name pointer m.mycuk.kr
[0] 171.99.52.117.in-addr.arpa.: domain name does not exist
[0] 172.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 173.99.52.117.in-addr.arpa. domain name pointer check.cuk.edu
[0] 174.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 175.99.52.117.in-addr.arpa. domain name pointer cuinfo.cuk.edu idc-elibdb01.cuk.edu
[0] 176.99.52.117.in-addr.arpa.: domain name does not exist
[0] 177.99.52.117.in-addr.arpa.: domain name does not exist
[0] 178.99.52.117.in-addr.arpa.: domain name does not exist
[0] 179.99.52.117.in-addr.arpa.: domain name does not exist
[0] 180.99.52.117.in-addr.arpa.: domain name does not exist
[0] 181.99.52.117.in-addr.arpa.: domain name does not exist
[0] 182.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 183.99.52.117.in-addr.arpa. domain name pointer library01.cuk.edu
[3600] 184.99.52.117.in-addr.arpa. domain name pointer library02.cuk.edu
[0] 185.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 186.99.52.117.in-addr.arpa. domain name pointer gradcerti.cuk.edu idc-gradcerti01.cuk.edu
[0] 187.99.52.117.in-addr.arpa.: domain name does not exist
[0] 188.99.52.117.in-addr.arpa.: domain name does not exist
[0] 189.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 190.99.52.117.in-addr.arpa. domain name pointer pki.cuk.edu
[3600] 191.99.52.117.in-addr.arpa. domain name pointer gpay.cuk.edu gpay01.cuk.edu
[0] 192.99.52.117.in-addr.arpa.: domain name does not exist
[0] 193.99.52.117.in-addr.arpa.: domain name does not exist
[0] 194.99.52.117.in-addr.arpa.: domain name does not exist
[0] 195.99.52.117.in-addr.arpa.: domain name does not exist
[0] 196.99.52.117.in-addr.arpa.: domain name does not exist
[0] 197.99.52.117.in-addr.arpa.: domain name does not exist
[0] 198.99.52.117.in-addr.arpa.: domain name does not exist
[0] 199.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 200.99.52.117.in-addr.arpa. domain name pointer grad.cuk.edu eng.cuk.edu rci.cuk.edu
[0] 201.99.52.117.in-addr.arpa.: domain name does not exist
[0] 202.99.52.117.in-addr.arpa.: domain name does not exist
[0] 203.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 204.99.52.117.in-addr.arpa. domain name pointer cms01.cuk.edu
[3600] 205.99.52.117.in-addr.arpa. domain name pointer cms02.cuk.edu
[3600] 206.99.52.117.in-addr.arpa. domain name pointer intra01.cuk.edu intra.cuk.edu
[3600] 207.99.52.117.in-addr.arpa. domain name pointer intra02.cuk.edu
[0] 208.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 209.99.52.117.in-addr.arpa. domain name pointer wcam01.sys.cuk.edu webcam01.cuk.edu
[0] 210.99.52.117.in-addr.arpa.: domain name does not exist
[0] 211.99.52.117.in-addr.arpa.: domain name does not exist
[0] 212.99.52.117.in-addr.arpa.: domain name does not exist
[0] 213.99.52.117.in-addr.arpa.: domain name does not exist
[0] 214.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 215.99.52.117.in-addr.arpa. domain name pointer lms03.cuk.edu idc-lms03.cuk.edu lms.cyberkorea.ac.kr lms.cuk.edu
[0] 216.99.52.117.in-addr.arpa.: domain name does not exist
[0] 217.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 218.99.52.117.in-addr.arpa. domain name pointer mng.cyberkorea.ac.kr mng02.cuk.edu idc-mng02.cuk.edu mng.cuk.edu
[0] 219.99.52.117.in-addr.arpa.: domain name does not exist
[0] 220.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 221.99.52.117.in-addr.arpa. domain name pointer oldweb.cuk.edu
[0] 222.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 223.99.52.117.in-addr.arpa. domain name pointer idc-sourcebk01.cuk.edu sourcebk.sys.cuk.edu
[0] 224.99.52.117.in-addr.arpa.: domain name does not exist
[0] 225.99.52.117.in-addr.arpa.: domain name does not exist
[0] 226.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 227.99.52.117.in-addr.arpa. domain name pointer exam.cuk.edu examweb02.cuk.edu
[0] 228.99.52.117.in-addr.arpa.: domain name does not exist
[0] 229.99.52.117.in-addr.arpa.: domain name does not exist
[0] 230.99.52.117.in-addr.arpa.: domain name does not exist
[0] 231.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 232.99.52.117.in-addr.arpa. domain name pointer upload.cyberkorea.ac.kr lcms.cuk.edu upload.cuk.edu idc-lcms02.cuk.edu
[0] 233.99.52.117.in-addr.arpa.: domain name does not exist
[0] 234.99.52.117.in-addr.arpa.: domain name does not exist
[0] 235.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 236.99.52.117.in-addr.arpa. domain name pointer img01.cuk.edu dist01.cuk.edu
[3600] 237.99.52.117.in-addr.arpa. domain name pointer img02.cuk.edu dist02.cuk.edu
[3600] 238.99.52.117.in-addr.arpa. domain name pointer eval01.cuk.edu
[3600] 239.99.52.117.in-addr.arpa. domain name pointer eval02.cuk.edu
[0] 240.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 241.99.52.117.in-addr.arpa. domain name pointer pgo.cuk.edu.cuk.edu pgo.cuk.edu secure.cyberkorea.ac.kr time01.cuk.edu secure01.cyberkorea.ac.kr
[3600] 242.99.52.117.in-addr.arpa. domain name pointer time02.cuk.edu
[0] 243.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 244.99.52.117.in-addr.arpa. domain name pointer emc01.sys.cuk.edu ns01.sys.cuk.edu
[3600] 245.99.52.117.in-addr.arpa. domain name pointer ns350mk1.cuk.edu
[0] 246.99.52.117.in-addr.arpa.: domain name does not exist
[0] 247.99.52.117.in-addr.arpa.: domain name does not exist
[0] 248.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 249.99.52.117.in-addr.arpa. domain name pointer idc-hnas01.sys.cuk.edu
[0] 250.99.52.117.in-addr.arpa.: domain name does not exist
[3600] 251.99.52.117.in-addr.arpa. domain name pointer l3-01.cuk.edu
[3600] 252.99.52.117.in-addr.arpa. domain name pointer l3-02.cuk.edu
[0] 253.99.52.117.in-addr.arpa.: domain name does not exist
[0] 254.99.52.117.in-addr.arpa.: domain name does not exist
[0] 255.99.52.117.in-addr.arpa.: domain name does not exist