[0] 0.100.189.137.in-addr.arpa.: domain name does not exist
[86400] 1.100.189.137.in-addr.arpa. domain name pointer serv02.acae.cuhk.edu.hk
[0] 2.100.189.137.in-addr.arpa.: domain name does not exist
[86400] 3.100.189.137.in-addr.arpa. domain name pointer acaepdc.acae.cuhk.edu.hk
[86400] 4.100.189.137.in-addr.arpa. domain name pointer spring.acae.cuhk.edu.hk
[86400] 5.100.189.137.in-addr.arpa. domain name pointer serv05.acae.cuhk.edu.hk
[86400] 6.100.189.137.in-addr.arpa. domain name pointer acaebdc.acae.cuhk.edu.hk
[0] 7.100.189.137.in-addr.arpa.: domain name does not exist
[86400] 8.100.189.137.in-addr.arpa. domain name pointer easter.acae.cuhk.edu.hk
[86400] 9.100.189.137.in-addr.arpa. domain name pointer serv03.acae.cuhk.edu.hk
[86400] 10.100.189.137.in-addr.arpa. domain name pointer season.acae.cuhk.edu.hk
[86400] 11.100.189.137.in-addr.arpa. domain name pointer sun11.acae.cuhk.edu.hk
[86400] 12.100.189.137.in-addr.arpa. domain name pointer sun2.acae.cuhk.edu.hk
[86400] 13.100.189.137.in-addr.arpa. domain name pointer sun3.acae.cuhk.edu.hk
[86400] 14.100.189.137.in-addr.arpa. domain name pointer sun4.acae.cuhk.edu.hk
[86400] 15.100.189.137.in-addr.arpa. domain name pointer sun5.acae.cuhk.edu.hk
[86400] 16.100.189.137.in-addr.arpa. domain name pointer sun6.acae.cuhk.edu.hk
[86400] 17.100.189.137.in-addr.arpa. domain name pointer sun7.acae.cuhk.edu.hk
[86400] 18.100.189.137.in-addr.arpa. domain name pointer sun8.acae.cuhk.edu.hk
[86400] 19.100.189.137.in-addr.arpa. domain name pointer sun9.acae.cuhk.edu.hk
[86400] 20.100.189.137.in-addr.arpa. domain name pointer sun10.acae.cuhk.edu.hk
[0] 21.100.189.137.in-addr.arpa.: domain name does not exist
[86400] 22.100.189.137.in-addr.arpa. domain name pointer sun12.acae.cuhk.edu.hk
[86400] 23.100.189.137.in-addr.arpa. domain name pointer maews13.acae.cuhk.edu.hk
[0] 24.100.189.137.in-addr.arpa.: domain name does not exist
[0] 25.100.189.137.in-addr.arpa.: domain name does not exist
[86400] 26.100.189.137.in-addr.arpa. domain name pointer sun16.acae.cuhk.edu.hk
[86400] 27.100.189.137.in-addr.arpa. domain name pointer sun17.acae.cuhk.edu.hk
[86400] 28.100.189.137.in-addr.arpa. domain name pointer sun18.acae.cuhk.edu.hk
[0] 29.100.189.137.in-addr.arpa.: domain name does not exist
[86400] 30.100.189.137.in-addr.arpa. domain name pointer sun20.acae.cuhk.edu.hk
[0] 31.100.189.137.in-addr.arpa.: domain name does not exist
[86400] 32.100.189.137.in-addr.arpa. domain name pointer sun22.acae.cuhk.edu.hk
[86400] 33.100.189.137.in-addr.arpa. domain name pointer sun23.acae.cuhk.edu.hk
[86400] 34.100.189.137.in-addr.arpa. domain name pointer sun24.acae.cuhk.edu.hk
[86400] 35.100.189.137.in-addr.arpa. domain name pointer sun25.acae.cuhk.edu.hk
[0] 36.100.189.137.in-addr.arpa.: domain name does not exist
[86400] 37.100.189.137.in-addr.arpa. domain name pointer sun27.acae.cuhk.edu.hk
[86400] 38.100.189.137.in-addr.arpa. domain name pointer sun28.acae.cuhk.edu.hk
[0] 39.100.189.137.in-addr.arpa.: domain name does not exist
[0] 40.100.189.137.in-addr.arpa.: domain name does not exist
[0] 41.100.189.137.in-addr.arpa.: domain name does not exist
[86400] 42.100.189.137.in-addr.arpa. domain name pointer sun32.acae.cuhk.edu.hk
[86400] 43.100.189.137.in-addr.arpa. domain name pointer sun33.acae.cuhk.edu.hk
[0] 44.100.189.137.in-addr.arpa.: domain name does not exist
[86400] 45.100.189.137.in-addr.arpa. domain name pointer sun35.acae.cuhk.edu.hk
[86400] 46.100.189.137.in-addr.arpa. domain name pointer sun36.acae.cuhk.edu.hk
[0] 47.100.189.137.in-addr.arpa.: domain name does not exist
[86400] 48.100.189.137.in-addr.arpa. domain name pointer sun38.acae.cuhk.edu.hk
[0] 49.100.189.137.in-addr.arpa.: domain name does not exist
[86400] 50.100.189.137.in-addr.arpa. domain name pointer sun40.acae.cuhk.edu.hk
[86400] 51.100.189.137.in-addr.arpa. domain name pointer sun41.acae.cuhk.edu.hk
[0] 52.100.189.137.in-addr.arpa.: domain name does not exist
[86400] 53.100.189.137.in-addr.arpa. domain name pointer sun43.acae.cuhk.edu.hk
[86400] 54.100.189.137.in-addr.arpa. domain name pointer sun44.acae.cuhk.edu.hk
[86400] 55.100.189.137.in-addr.arpa. domain name pointer sun45.acae.cuhk.edu.hk
[86400] 56.100.189.137.in-addr.arpa. domain name pointer sun46.acae.cuhk.edu.hk
[86400] 57.100.189.137.in-addr.arpa. domain name pointer sun47.acae.cuhk.edu.hk
[86400] 58.100.189.137.in-addr.arpa. domain name pointer sun48.acae.cuhk.edu.hk
[86400] 59.100.189.137.in-addr.arpa. domain name pointer sun49.acae.cuhk.edu.hk
[86400] 60.100.189.137.in-addr.arpa. domain name pointer sun50.acae.cuhk.edu.hk
[86400] 61.100.189.137.in-addr.arpa. domain name pointer sun51.acae.cuhk.edu.hk
[86400] 62.100.189.137.in-addr.arpa. domain name pointer sun52.acae.cuhk.edu.hk
[86400] 63.100.189.137.in-addr.arpa. domain name pointer sun53.acae.cuhk.edu.hk
[86400] 64.100.189.137.in-addr.arpa. domain name pointer sun54.acae.cuhk.edu.hk
[86400] 65.100.189.137.in-addr.arpa. domain name pointer sun55.acae.cuhk.edu.hk
[0] 66.100.189.137.in-addr.arpa.: domain name does not exist
[0] 67.100.189.137.in-addr.arpa.: domain name does not exist
[86400] 68.100.189.137.in-addr.arpa. domain name pointer sun58.acae.cuhk.edu.hk
[86400] 69.100.189.137.in-addr.arpa. domain name pointer sun59.acae.cuhk.edu.hk
[86400] 70.100.189.137.in-addr.arpa. domain name pointer sun60.acae.cuhk.edu.hk
[86400] 71.100.189.137.in-addr.arpa. domain name pointer sun61.acae.cuhk.edu.hk
[86400] 72.100.189.137.in-addr.arpa. domain name pointer sun62.acae.cuhk.edu.hk
[86400] 73.100.189.137.in-addr.arpa. domain name pointer sun63.acae.cuhk.edu.hk
[0] 74.100.189.137.in-addr.arpa.: domain name does not exist
[86400] 75.100.189.137.in-addr.arpa. domain name pointer sun65.acae.cuhk.edu.hk
[86400] 76.100.189.137.in-addr.arpa. domain name pointer sun66.acae.cuhk.edu.hk
[86400] 77.100.189.137.in-addr.arpa. domain name pointer sun67.acae.cuhk.edu.hk
[86400] 78.100.189.137.in-addr.arpa. domain name pointer sun68.acae.cuhk.edu.hk
[86400] 79.100.189.137.in-addr.arpa. domain name pointer sun69.acae.cuhk.edu.hk
[86400] 80.100.189.137.in-addr.arpa. domain name pointer sun70.acae.cuhk.edu.hk
[0] 81.100.189.137.in-addr.arpa.: domain name does not exist
[0] 82.100.189.137.in-addr.arpa.: domain name does not exist
[0] 83.100.189.137.in-addr.arpa.: domain name does not exist
[0] 84.100.189.137.in-addr.arpa.: domain name does not exist
[0] 85.100.189.137.in-addr.arpa.: domain name does not exist
[86400] 86.100.189.137.in-addr.arpa. domain name pointer sun76.acae.cuhk.edu.hk
[86400] 87.100.189.137.in-addr.arpa. domain name pointer sun77.acae.cuhk.edu.hk
[86400] 88.100.189.137.in-addr.arpa. domain name pointer sun78.acae.cuhk.edu.hk
[86400] 89.100.189.137.in-addr.arpa. domain name pointer sun79.acae.cuhk.edu.hk
[86400] 90.100.189.137.in-addr.arpa. domain name pointer sun80.acae.cuhk.edu.hk
[86400] 91.100.189.137.in-addr.arpa. domain name pointer cam1.acae.cuhk.edu.hk
[86400] 92.100.189.137.in-addr.arpa. domain name pointer cam2.acae.cuhk.edu.hk
[86400] 93.100.189.137.in-addr.arpa. domain name pointer cam3.acae.cuhk.edu.hk
[86400] 94.100.189.137.in-addr.arpa. domain name pointer cam4.acae.cuhk.edu.hk
[0] 95.100.189.137.in-addr.arpa.: domain name does not exist
[0] 96.100.189.137.in-addr.arpa.: domain name does not exist
[0] 97.100.189.137.in-addr.arpa.: domain name does not exist
[0] 98.100.189.137.in-addr.arpa.: domain name does not exist
[0] 99.100.189.137.in-addr.arpa.: domain name does not exist
[0] 100.100.189.137.in-addr.arpa.: domain name does not exist
[86400] 101.100.189.137.in-addr.arpa. domain name pointer cwanglap.acae.cuhk.edu.hk
[86400] 102.100.189.137.in-addr.arpa. domain name pointer nas1.acae.cuhk.edu.hk
[86400] 103.100.189.137.in-addr.arpa. domain name pointer nas2.acae.cuhk.edu.hk
[86400] 104.100.189.137.in-addr.arpa. domain name pointer hshg01.acae.cuhk.edu.hk
[86400] 105.100.189.137.in-addr.arpa. domain name pointer yhliulap2.acae.cuhk.edu.hk
[0] 106.100.189.137.in-addr.arpa.: domain name does not exist
[0] 107.100.189.137.in-addr.arpa.: domain name does not exist
[0] 108.100.189.137.in-addr.arpa.: domain name does not exist
[0] 109.100.189.137.in-addr.arpa.: domain name does not exist
[0] 110.100.189.137.in-addr.arpa.: domain name does not exist
[0] 111.100.189.137.in-addr.arpa.: domain name does not exist
[0] 112.100.189.137.in-addr.arpa.: domain name does not exist
[0] 113.100.189.137.in-addr.arpa.: domain name does not exist
[0] 114.100.189.137.in-addr.arpa.: domain name does not exist
[0] 115.100.189.137.in-addr.arpa.: domain name does not exist
[0] 116.100.189.137.in-addr.arpa.: domain name does not exist
[0] 117.100.189.137.in-addr.arpa.: domain name does not exist
[0] 118.100.189.137.in-addr.arpa.: domain name does not exist
[0] 119.100.189.137.in-addr.arpa.: domain name does not exist
[0] 120.100.189.137.in-addr.arpa.: domain name does not exist
[0] 121.100.189.137.in-addr.arpa.: domain name does not exist
[0] 122.100.189.137.in-addr.arpa.: domain name does not exist
[0] 123.100.189.137.in-addr.arpa.: domain name does not exist
[0] 124.100.189.137.in-addr.arpa.: domain name does not exist
[0] 125.100.189.137.in-addr.arpa.: domain name does not exist
[0] 126.100.189.137.in-addr.arpa.: domain name does not exist
[0] 127.100.189.137.in-addr.arpa.: domain name does not exist
[0] 128.100.189.137.in-addr.arpa.: domain name does not exist
[0] 129.100.189.137.in-addr.arpa.: domain name does not exist
[0] 130.100.189.137.in-addr.arpa.: domain name does not exist
[86400] 131.100.189.137.in-addr.arpa. domain name pointer hplp1.acae.cuhk.edu.hk
[86400] 132.100.189.137.in-addr.arpa. domain name pointer hplp2.acae.cuhk.edu.hk
[86400] 133.100.189.137.in-addr.arpa. domain name pointer hplps1.acae.cuhk.edu.hk
[86400] 134.100.189.137.in-addr.arpa. domain name pointer hplp4.acae.cuhk.edu.hk
[86400] 135.100.189.137.in-addr.arpa. domain name pointer hplp5.acae.cuhk.edu.hk
[0] 136.100.189.137.in-addr.arpa.: domain name does not exist
[86400] 137.100.189.137.in-addr.arpa. domain name pointer hplps2.acae.cuhk.edu.hk
[86400] 138.100.189.137.in-addr.arpa. domain name pointer hplp7.acae.cuhk.edu.hk
[86400] 139.100.189.137.in-addr.arpa. domain name pointer hplp8.acae.cuhk.edu.hk
[86400] 140.100.189.137.in-addr.arpa. domain name pointer lptech.acae.cuhk.edu.hk
[86400] 141.100.189.137.in-addr.arpa. domain name pointer hplp10.acae.cuhk.edu.hk
[86400] 142.100.189.137.in-addr.arpa. domain name pointer hplp11.acae.cuhk.edu.hk
[86400] 143.100.189.137.in-addr.arpa. domain name pointer hplp12.acae.cuhk.edu.hk
[86400] 144.100.189.137.in-addr.arpa. domain name pointer hplp13.acae.cuhk.edu.hk
[86400] 145.100.189.137.in-addr.arpa. domain name pointer hplp14.acae.cuhk.edu.hk
[86400] 146.100.189.137.in-addr.arpa. domain name pointer hplp15.acae.cuhk.edu.hk
[86400] 147.100.189.137.in-addr.arpa. domain name pointer hplp16.acae.cuhk.edu.hk
[86400] 148.100.189.137.in-addr.arpa. domain name pointer hplp17.acae.cuhk.edu.hk
[86400] 149.100.189.137.in-addr.arpa. domain name pointer hplp19.acae.cuhk.edu.hk
[86400] 150.100.189.137.in-addr.arpa. domain name pointer hplp18.acae.cuhk.edu.hk
[86400] 151.100.189.137.in-addr.arpa. domain name pointer hpdj1.acae.cuhk.eud.hk
[86400] 152.100.189.137.in-addr.arpa. domain name pointer tekclp1.acae.cuhk.edu.hk
[86400] 153.100.189.137.in-addr.arpa. domain name pointer tekclp2.acae.cuhk.edu.hk
[86400] 154.100.189.137.in-addr.arpa. domain name pointer hpclp1.acae.cuhk.edu.hk
[86400] 155.100.189.137.in-addr.arpa. domain name pointer hpclp2.acae.cuhk.edu.hk
[86400] 156.100.189.137.in-addr.arpa. domain name pointer tekclp3.acae.cuhk.edu.hk
[86400] 157.100.189.137.in-addr.arpa. domain name pointer hplp3.acae.cuhk.edu.hk
[86400] 158.100.189.137.in-addr.arpa. domain name pointer hplp302.acae.cuhk.edu.hk
[0] 159.100.189.137.in-addr.arpa.: domain name does not exist
[86400] 160.100.189.137.in-addr.arpa. domain name pointer lpsysadm.acae.cuhk.edu.hk
[86400] 161.100.189.137.in-addr.arpa. domain name pointer hplp20.acae.cuhk.edu.hk
[86400] 162.100.189.137.in-addr.arpa. domain name pointer hplp21.acae.cuhk.edu.hk
[86400] 163.100.189.137.in-addr.arpa. domain name pointer hplp22.acae.cuhk.edu.hk
[86400] 164.100.189.137.in-addr.arpa. domain name pointer hplp23.acae.cuhk.edu.hk
[86400] 165.100.189.137.in-addr.arpa. domain name pointer hplp24.acae.cuhk.edu.hk
[86400] 166.100.189.137.in-addr.arpa. domain name pointer hplp25.acae.cuhk.edu.hk hplp30.acae.cuhk.edu.hk
[86400] 167.100.189.137.in-addr.arpa. domain name pointer hplp26.acae.cuhk.edu.hk
[86400] 168.100.189.137.in-addr.arpa. domain name pointer hplp27.acae.cuhk.edu.hk
[86400] 169.100.189.137.in-addr.arpa. domain name pointer hplps4.acae.cuhk.edu.hk
[86400] 170.100.189.137.in-addr.arpa. domain name pointer hplp28.acae.cuhk.edu.hk
[86400] 171.100.189.137.in-addr.arpa. domain name pointer hplp29.acae.cuhk.edu.hk
[0] 172.100.189.137.in-addr.arpa.: domain name does not exist
[86400] 173.100.189.137.in-addr.arpa. domain name pointer hplp31.acae.cuhk.edu.hk
[0] 174.100.189.137.in-addr.arpa.: domain name does not exist
[0] 175.100.189.137.in-addr.arpa.: domain name does not exist
[0] 176.100.189.137.in-addr.arpa.: domain name does not exist
[0] 177.100.189.137.in-addr.arpa.: domain name does not exist
[0] 178.100.189.137.in-addr.arpa.: domain name does not exist
[0] 179.100.189.137.in-addr.arpa.: domain name does not exist
[0] 180.100.189.137.in-addr.arpa.: domain name does not exist
[0] 181.100.189.137.in-addr.arpa.: domain name does not exist
[0] 182.100.189.137.in-addr.arpa.: domain name does not exist
[0] 183.100.189.137.in-addr.arpa.: domain name does not exist
[0] 184.100.189.137.in-addr.arpa.: domain name does not exist
[0] 185.100.189.137.in-addr.arpa.: domain name does not exist
[0] 186.100.189.137.in-addr.arpa.: domain name does not exist
[0] 187.100.189.137.in-addr.arpa.: domain name does not exist
[0] 188.100.189.137.in-addr.arpa.: domain name does not exist
[0] 189.100.189.137.in-addr.arpa.: domain name does not exist
[0] 190.100.189.137.in-addr.arpa.: domain name does not exist
[0] 191.100.189.137.in-addr.arpa.: domain name does not exist
[0] 192.100.189.137.in-addr.arpa.: domain name does not exist
[0] 193.100.189.137.in-addr.arpa.: domain name does not exist
[0] 194.100.189.137.in-addr.arpa.: domain name does not exist
[0] 195.100.189.137.in-addr.arpa.: domain name does not exist
[0] 196.100.189.137.in-addr.arpa.: domain name does not exist
[0] 197.100.189.137.in-addr.arpa.: domain name does not exist
[0] 198.100.189.137.in-addr.arpa.: domain name does not exist
[86400] 199.100.189.137.in-addr.arpa. domain name pointer watchproject.acae.cuhk.edu.hk.100.189.137.in-addr.arpa
[86400] 200.100.189.137.in-addr.arpa. domain name pointer acclserv.acae.cuhk.edu.hk
[86400] 201.100.189.137.in-addr.arpa. domain name pointer videoserver.acae.cuhk.edu.hk
[86400] 202.100.189.137.in-addr.arpa. domain name pointer emlserv.acae.cuhk.edu.hk
[86400] 203.100.189.137.in-addr.arpa. domain name pointer emlvideo.acae.cuhk.edu.hk
[86400] 204.100.189.137.in-addr.arpa. domain name pointer cmdlserv.acae.cuhk.edu.hk
[86400] 205.100.189.137.in-addr.arpa. domain name pointer pc101.acae.cuhk.edu.hk
[86400] 206.100.189.137.in-addr.arpa. domain name pointer linux206.acae.cuhk.edu.hk
[86400] 207.100.189.137.in-addr.arpa. domain name pointer arlnat.acae.cuhk.edu.hk
[86400] 208.100.189.137.in-addr.arpa. domain name pointer erc.acae.cuhk.edu.hk
[86400] 209.100.189.137.in-addr.arpa. domain name pointer maefw1.acae.cuhk.edu.hk
[86400] 210.100.189.137.in-addr.arpa. domain name pointer pdc2006.acae.cuhk.edu.hk
[86400] 211.100.189.137.in-addr.arpa. domain name pointer accl1.acae.cuhk.edu.hk
[86400] 212.100.189.137.in-addr.arpa. domain name pointer win2003.acae.cuhk.edu.hk
[86400] 213.100.189.137.in-addr.arpa. domain name pointer dell2850w.acae.cuhk.edu.hk
[86400] 214.100.189.137.in-addr.arpa. domain name pointer maesgi4.acae.cuhk.edu.hk
[86400] 215.100.189.137.in-addr.arpa. domain name pointer accl2.acae.cuhk.edu.hk
[86400] 216.100.189.137.in-addr.arpa. domain name pointer lpc300.acae.cuhk.edu.hk
[86400] 217.100.189.137.in-addr.arpa. domain name pointer lpc301.acae.cuhk.edu.hk
[86400] 218.100.189.137.in-addr.arpa. domain name pointer lpc302.acae.cuhk.edu.hk
[86400] 219.100.189.137.in-addr.arpa. domain name pointer lpc303.acae.cuhk.edu.hk
[86400] 220.100.189.137.in-addr.arpa. domain name pointer lpc304.acae.cuhk.edu.hk
[86400] 221.100.189.137.in-addr.arpa. domain name pointer lpc305.acae.cuhk.edu.hk
[0] 222.100.189.137.in-addr.arpa.: domain name does not exist
[0] 223.100.189.137.in-addr.arpa.: domain name does not exist
[86400] 224.100.189.137.in-addr.arpa. domain name pointer catmain.acae.cuhk.edu.hk
[86400] 225.100.189.137.in-addr.arpa. domain name pointer cat0a.acae.cuhk.edu.hk
[86400] 226.100.189.137.in-addr.arpa. domain name pointer cat0b.acae.cuhk.edu.hk
[86400] 227.100.189.137.in-addr.arpa. domain name pointer cat1a.acae.cuhk.edu.hk
[86400] 228.100.189.137.in-addr.arpa. domain name pointer cat1b.acae.cuhk.edu.hk
[86400] 229.100.189.137.in-addr.arpa. domain name pointer cat2a.acae.cuhk.edu.hk
[86400] 230.100.189.137.in-addr.arpa. domain name pointer cat2b.acae.cuhk.edu.hk
[86400] 231.100.189.137.in-addr.arpa. domain name pointer cat3a.acae.cuhk.edu.hk
[86400] 232.100.189.137.in-addr.arpa. domain name pointer cat3b.acae.cuhk.edu.hk
[86400] 233.100.189.137.in-addr.arpa. domain name pointer cap01.acae.cuhk.edu.hk
[86400] 234.100.189.137.in-addr.arpa. domain name pointer cap02.acae.cuhk.edu.hk
[86400] 235.100.189.137.in-addr.arpa. domain name pointer stereo.acae.cuhk.edu.hk
[86400] 236.100.189.137.in-addr.arpa. domain name pointer space.acae.cuhk.edu.hk
[86400] 237.100.189.137.in-addr.arpa. domain name pointer mail1.acae.cuhk.edu.hk
[86400] 238.100.189.137.in-addr.arpa. domain name pointer elockpc1.acae.cuhk.edu.hk
[86400] 239.100.189.137.in-addr.arpa. domain name pointer elockpc2.acae.cuhk.edu.hk
[86400] 240.100.189.137.in-addr.arpa. domain name pointer camsvr1.acae.cuhk.edu.hk
[86400] 241.100.189.137.in-addr.arpa. domain name pointer camsvr2.acae.cuhk.edu.hk
[86400] 242.100.189.137.in-addr.arpa. domain name pointer start2.acae.cuhk.edu.hk
[0] 243.100.189.137.in-addr.arpa.: domain name does not exist
[86400] 244.100.189.137.in-addr.arpa. domain name pointer dadmin.acae.cuhk.edu.hk
[0] 245.100.189.137.in-addr.arpa.: domain name does not exist
[86400] 246.100.189.137.in-addr.arpa. domain name pointer viewcam.acae.cuhk.edu.hk
[86400] 247.100.189.137.in-addr.arpa. domain name pointer xmas.acae.cuhk.edu.hk
[86400] 248.100.189.137.in-addr.arpa. domain name pointer matlab1.acae.cuhk.edu.hk
[86400] 249.100.189.137.in-addr.arpa. domain name pointer videocam.acae.cuhk.edu.hk
[86400] 250.100.189.137.in-addr.arpa. domain name pointer spc79.acae.cuhk.edu.hk
[0] 251.100.189.137.in-addr.arpa.: domain name does not exist
[0] 252.100.189.137.in-addr.arpa.: domain name does not exist
[0] 253.100.189.137.in-addr.arpa.: domain name does not exist
[0] 254.100.189.137.in-addr.arpa.: domain name does not exist
[0] 255.100.189.137.in-addr.arpa.: domain name does not exist