[0] 0.241.66.59.in-addr.arpa.: domain name does not exist
[0] 1.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 2.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 3.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 4.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 5.241.66.59.in-addr.arpa. domain name pointer th241005.ip.tsinghua.edu.cn
[86400] 6.241.66.59.in-addr.arpa. domain name pointer th241006.ip.tsinghua.edu.cn
[86400] 7.241.66.59.in-addr.arpa. domain name pointer th241007.ip.tsinghua.edu.cn
[86400] 8.241.66.59.in-addr.arpa. domain name pointer th241008.ip.tsinghua.edu.cn
[86400] 9.241.66.59.in-addr.arpa. domain name pointer th241009.ip.tsinghua.edu.cn
[86400] 10.241.66.59.in-addr.arpa. domain name pointer th241010.ip.tsinghua.edu.cn
[86400] 11.241.66.59.in-addr.arpa. domain name pointer th241011.ip.tsinghua.edu.cn
[0] 12.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 13.241.66.59.in-addr.arpa. domain name pointer th241013.ip.tsinghua.edu.cn
[86400] 14.241.66.59.in-addr.arpa. domain name pointer th241014.ip.tsinghua.edu.cn
[0] 15.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 16.241.66.59.in-addr.arpa. domain name pointer th241016.ip.tsinghua.edu.cn
[86400] 17.241.66.59.in-addr.arpa. domain name pointer th241017.ip.tsinghua.edu.cn
[86400] 18.241.66.59.in-addr.arpa. domain name pointer th241018.ip.tsinghua.edu.cn
[86400] 19.241.66.59.in-addr.arpa. domain name pointer th241019.ip.tsinghua.edu.cn
[86400] 20.241.66.59.in-addr.arpa. domain name pointer th241020.ip.tsinghua.edu.cn
[0] 21.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 22.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 23.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 24.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 25.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 26.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 27.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 28.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 29.241.66.59.in-addr.arpa. domain name pointer th241029.ip.tsinghua.edu.cn
[86400] 30.241.66.59.in-addr.arpa. domain name pointer th241030.ip.tsinghua.edu.cn
[86400] 31.241.66.59.in-addr.arpa. domain name pointer th241031.ip.tsinghua.edu.cn
[86400] 32.241.66.59.in-addr.arpa. domain name pointer th241032.ip.tsinghua.edu.cn
[86400] 33.241.66.59.in-addr.arpa. domain name pointer th241033.ip.tsinghua.edu.cn
[0] 34.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 35.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 36.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 37.241.66.59.in-addr.arpa. domain name pointer th241037.ip.tsinghua.edu.cn
[86400] 38.241.66.59.in-addr.arpa. domain name pointer th241038.ip.tsinghua.edu.cn
[86400] 39.241.66.59.in-addr.arpa. domain name pointer th241039.ip.tsinghua.edu.cn
[86400] 40.241.66.59.in-addr.arpa. domain name pointer th241040.ip.tsinghua.edu.cn
[86400] 41.241.66.59.in-addr.arpa. domain name pointer th241041.ip.tsinghua.edu.cn
[86400] 42.241.66.59.in-addr.arpa. domain name pointer th241042.ip.tsinghua.edu.cn
[86400] 43.241.66.59.in-addr.arpa. domain name pointer th241043.ip.tsinghua.edu.cn
[86400] 44.241.66.59.in-addr.arpa. domain name pointer th241044.ip.tsinghua.edu.cn
[86400] 45.241.66.59.in-addr.arpa. domain name pointer th241045.ip.tsinghua.edu.cn
[86400] 46.241.66.59.in-addr.arpa. domain name pointer th241046.ip.tsinghua.edu.cn
[86400] 47.241.66.59.in-addr.arpa. domain name pointer th241047.ip.tsinghua.edu.cn
[86400] 48.241.66.59.in-addr.arpa. domain name pointer th241048.ip.tsinghua.edu.cn
[86400] 49.241.66.59.in-addr.arpa. domain name pointer th241049.ip.tsinghua.edu.cn
[86400] 50.241.66.59.in-addr.arpa. domain name pointer th241050.ip.tsinghua.edu.cn
[86400] 51.241.66.59.in-addr.arpa. domain name pointer th241051.ip.tsinghua.edu.cn
[86400] 52.241.66.59.in-addr.arpa. domain name pointer th241052.ip.tsinghua.edu.cn
[86400] 53.241.66.59.in-addr.arpa. domain name pointer th241053.ip.tsinghua.edu.cn
[86400] 54.241.66.59.in-addr.arpa. domain name pointer th241054.ip.tsinghua.edu.cn
[86400] 55.241.66.59.in-addr.arpa. domain name pointer th241055.ip.tsinghua.edu.cn
[0] 56.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 57.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 58.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 59.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 60.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 61.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 62.241.66.59.in-addr.arpa. domain name pointer th241062.ip.tsinghua.edu.cn
[86400] 63.241.66.59.in-addr.arpa. domain name pointer th241063.ip.tsinghua.edu.cn
[86400] 64.241.66.59.in-addr.arpa. domain name pointer th241064.ip.tsinghua.edu.cn
[86400] 65.241.66.59.in-addr.arpa. domain name pointer th241065.ip.tsinghua.edu.cn
[86400] 66.241.66.59.in-addr.arpa. domain name pointer th241066.ip.tsinghua.edu.cn
[86400] 67.241.66.59.in-addr.arpa. domain name pointer th241067.ip.tsinghua.edu.cn
[86400] 68.241.66.59.in-addr.arpa. domain name pointer th241068.ip.tsinghua.edu.cn
[86400] 69.241.66.59.in-addr.arpa. domain name pointer th241069.ip.tsinghua.edu.cn
[86400] 70.241.66.59.in-addr.arpa. domain name pointer th241070.ip.tsinghua.edu.cn
[0] 71.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 72.241.66.59.in-addr.arpa. domain name pointer th241072.ip.tsinghua.edu.cn
[0] 73.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 74.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 75.241.66.59.in-addr.arpa. domain name pointer th241075.ip.tsinghua.edu.cn
[0] 76.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 77.241.66.59.in-addr.arpa. domain name pointer th241077.ip.tsinghua.edu.cn
[86400] 78.241.66.59.in-addr.arpa. domain name pointer th241078.ip.tsinghua.edu.cn
[86400] 79.241.66.59.in-addr.arpa. domain name pointer th241079.ip.tsinghua.edu.cn
[86400] 80.241.66.59.in-addr.arpa. domain name pointer th241080.ip.tsinghua.edu.cn
[86400] 81.241.66.59.in-addr.arpa. domain name pointer th241081.ip.tsinghua.edu.cn
[86400] 82.241.66.59.in-addr.arpa. domain name pointer th241082.ip.tsinghua.edu.cn
[86400] 83.241.66.59.in-addr.arpa. domain name pointer th241083.ip.tsinghua.edu.cn
[86400] 84.241.66.59.in-addr.arpa. domain name pointer th241084.ip.tsinghua.edu.cn
[86400] 85.241.66.59.in-addr.arpa. domain name pointer th241085.ip.tsinghua.edu.cn
[86400] 86.241.66.59.in-addr.arpa. domain name pointer th241086.ip.tsinghua.edu.cn
[86400] 87.241.66.59.in-addr.arpa. domain name pointer th241087.ip.tsinghua.edu.cn
[86400] 88.241.66.59.in-addr.arpa. domain name pointer th241088.ip.tsinghua.edu.cn
[86400] 89.241.66.59.in-addr.arpa. domain name pointer th241089.ip.tsinghua.edu.cn
[86400] 90.241.66.59.in-addr.arpa. domain name pointer th241090.ip.tsinghua.edu.cn
[86400] 91.241.66.59.in-addr.arpa. domain name pointer th241091.ip.tsinghua.edu.cn
[0] 92.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 93.241.66.59.in-addr.arpa. domain name pointer th241093.ip.tsinghua.edu.cn
[86400] 94.241.66.59.in-addr.arpa. domain name pointer th241094.ip.tsinghua.edu.cn
[86400] 95.241.66.59.in-addr.arpa. domain name pointer th241095.ip.tsinghua.edu.cn
[86400] 96.241.66.59.in-addr.arpa. domain name pointer th241096.ip.tsinghua.edu.cn
[0] 97.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 98.241.66.59.in-addr.arpa. domain name pointer th241098.ip.tsinghua.edu.cn
[86400] 99.241.66.59.in-addr.arpa. domain name pointer th241099.ip.tsinghua.edu.cn
[0] 100.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 101.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 102.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 103.241.66.59.in-addr.arpa. domain name pointer th241103.ip.tsinghua.edu.cn
[86400] 104.241.66.59.in-addr.arpa. domain name pointer th241104.ip.tsinghua.edu.cn
[86400] 105.241.66.59.in-addr.arpa. domain name pointer th241105.ip.tsinghua.edu.cn
[0] 106.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 107.241.66.59.in-addr.arpa. domain name pointer th241107.ip.tsinghua.edu.cn
[86400] 108.241.66.59.in-addr.arpa. domain name pointer th241108.ip.tsinghua.edu.cn
[0] 109.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 110.241.66.59.in-addr.arpa. domain name pointer th241110.ip.tsinghua.edu.cn
[86400] 111.241.66.59.in-addr.arpa. domain name pointer th241111.ip.tsinghua.edu.cn
[0] 112.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 113.241.66.59.in-addr.arpa. domain name pointer th241113.ip.tsinghua.edu.cn
[0] 114.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 115.241.66.59.in-addr.arpa. domain name pointer th241115.ip.tsinghua.edu.cn
[86400] 116.241.66.59.in-addr.arpa. domain name pointer th241116.ip.tsinghua.edu.cn
[0] 117.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 118.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 119.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 120.241.66.59.in-addr.arpa. domain name pointer th241120.ip.tsinghua.edu.cn
[0] 121.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 122.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 123.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 124.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 125.241.66.59.in-addr.arpa. domain name pointer th241125.ip.tsinghua.edu.cn
[86400] 126.241.66.59.in-addr.arpa. domain name pointer th241126.ip.tsinghua.edu.cn
[86400] 127.241.66.59.in-addr.arpa. domain name pointer th241127.ip.tsinghua.edu.cn
[86400] 128.241.66.59.in-addr.arpa. domain name pointer th241128.ip.tsinghua.edu.cn
[86400] 129.241.66.59.in-addr.arpa. domain name pointer th241129.ip.tsinghua.edu.cn
[86400] 130.241.66.59.in-addr.arpa. domain name pointer th241130.ip.tsinghua.edu.cn
[86400] 131.241.66.59.in-addr.arpa. domain name pointer th241131.ip.tsinghua.edu.cn
[86400] 132.241.66.59.in-addr.arpa. domain name pointer th241132.ip.tsinghua.edu.cn
[86400] 133.241.66.59.in-addr.arpa. domain name pointer th241133.ip.tsinghua.edu.cn
[86400] 134.241.66.59.in-addr.arpa. domain name pointer th241134.ip.tsinghua.edu.cn
[86400] 135.241.66.59.in-addr.arpa. domain name pointer th241135.ip.tsinghua.edu.cn
[86400] 136.241.66.59.in-addr.arpa. domain name pointer th241136.ip.tsinghua.edu.cn
[0] 137.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 138.241.66.59.in-addr.arpa. domain name pointer th241138.ip.tsinghua.edu.cn
[0] 139.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 140.241.66.59.in-addr.arpa. domain name pointer th241140.ip.tsinghua.edu.cn
[86400] 141.241.66.59.in-addr.arpa. domain name pointer th241141.ip.tsinghua.edu.cn
[86400] 142.241.66.59.in-addr.arpa. domain name pointer th241142.ip.tsinghua.edu.cn
[0] 143.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 144.241.66.59.in-addr.arpa. domain name pointer th241144.ip.tsinghua.edu.cn
[86400] 145.241.66.59.in-addr.arpa. domain name pointer th241145.ip.tsinghua.edu.cn
[86400] 146.241.66.59.in-addr.arpa. domain name pointer th241146.ip.tsinghua.edu.cn
[86400] 147.241.66.59.in-addr.arpa. domain name pointer th241147.ip.tsinghua.edu.cn
[0] 148.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 149.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 150.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 151.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 152.241.66.59.in-addr.arpa. domain name pointer th241152.ip.tsinghua.edu.cn
[86400] 153.241.66.59.in-addr.arpa. domain name pointer th241153.ip.tsinghua.edu.cn
[86400] 154.241.66.59.in-addr.arpa. domain name pointer th241154.ip.tsinghua.edu.cn
[0] 155.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 156.241.66.59.in-addr.arpa. domain name pointer th241156.ip.tsinghua.edu.cn
[86400] 157.241.66.59.in-addr.arpa. domain name pointer th241157.ip.tsinghua.edu.cn
[86400] 158.241.66.59.in-addr.arpa. domain name pointer th241158.ip.tsinghua.edu.cn
[0] 159.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 160.241.66.59.in-addr.arpa. domain name pointer th241160.ip.tsinghua.edu.cn
[86400] 161.241.66.59.in-addr.arpa. domain name pointer th241161.ip.tsinghua.edu.cn
[0] 162.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 163.241.66.59.in-addr.arpa. domain name pointer th241163.ip.tsinghua.edu.cn
[86400] 164.241.66.59.in-addr.arpa. domain name pointer th241164.ip.tsinghua.edu.cn
[86400] 165.241.66.59.in-addr.arpa. domain name pointer th241165.ip.tsinghua.edu.cn
[0] 166.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 167.241.66.59.in-addr.arpa. domain name pointer th241167.ip.tsinghua.edu.cn
[86400] 168.241.66.59.in-addr.arpa. domain name pointer th241168.ip.tsinghua.edu.cn
[86400] 169.241.66.59.in-addr.arpa. domain name pointer th241169.ip.tsinghua.edu.cn
[86400] 170.241.66.59.in-addr.arpa. domain name pointer th241170.ip.tsinghua.edu.cn
[86400] 171.241.66.59.in-addr.arpa. domain name pointer th241171.ip.tsinghua.edu.cn
[86400] 172.241.66.59.in-addr.arpa. domain name pointer th241172.ip.tsinghua.edu.cn
[0] 173.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 174.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 175.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 176.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 177.241.66.59.in-addr.arpa. domain name pointer th241177.ip.tsinghua.edu.cn
[0] 178.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 179.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 180.241.66.59.in-addr.arpa. domain name pointer th241180.ip.tsinghua.edu.cn
[0] 181.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 182.241.66.59.in-addr.arpa. domain name pointer th241182.ip.tsinghua.edu.cn
[0] 183.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 184.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 185.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 186.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 187.241.66.59.in-addr.arpa. domain name pointer th241187.ip.tsinghua.edu.cn
[0] 188.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 189.241.66.59.in-addr.arpa. domain name pointer th241189.ip.tsinghua.edu.cn
[86400] 190.241.66.59.in-addr.arpa. domain name pointer th241190.ip.tsinghua.edu.cn
[86400] 191.241.66.59.in-addr.arpa. domain name pointer th241191.ip.tsinghua.edu.cn
[86400] 192.241.66.59.in-addr.arpa. domain name pointer th241192.ip.tsinghua.edu.cn
[86400] 193.241.66.59.in-addr.arpa. domain name pointer th241193.ip.tsinghua.edu.cn
[0] 194.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 195.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 196.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 197.241.66.59.in-addr.arpa. domain name pointer th241197.ip.tsinghua.edu.cn
[86400] 198.241.66.59.in-addr.arpa. domain name pointer th241198.ip.tsinghua.edu.cn
[0] 199.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 200.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 201.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 202.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 203.241.66.59.in-addr.arpa. domain name pointer th241203.ip.tsinghua.edu.cn
[86400] 204.241.66.59.in-addr.arpa. domain name pointer th241204.ip.tsinghua.edu.cn
[86400] 205.241.66.59.in-addr.arpa. domain name pointer th241205.ip.tsinghua.edu.cn
[0] 206.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 207.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 208.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 209.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 210.241.66.59.in-addr.arpa. domain name pointer th241210.ip.tsinghua.edu.cn
[86400] 211.241.66.59.in-addr.arpa. domain name pointer th241211.ip.tsinghua.edu.cn
[86400] 212.241.66.59.in-addr.arpa. domain name pointer th241212.ip.tsinghua.edu.cn
[86400] 213.241.66.59.in-addr.arpa. domain name pointer th241213.ip.tsinghua.edu.cn
[86400] 214.241.66.59.in-addr.arpa. domain name pointer th241214.ip.tsinghua.edu.cn
[0] 215.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 216.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 217.241.66.59.in-addr.arpa. domain name pointer th241217.ip.tsinghua.edu.cn
[86400] 218.241.66.59.in-addr.arpa. domain name pointer th241218.ip.tsinghua.edu.cn
[0] 219.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 220.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 221.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 222.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 223.241.66.59.in-addr.arpa. domain name pointer th241223.ip.tsinghua.edu.cn
[86400] 224.241.66.59.in-addr.arpa. domain name pointer th241224.ip.tsinghua.edu.cn
[0] 225.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 226.241.66.59.in-addr.arpa. domain name pointer th241226.ip.tsinghua.edu.cn
[0] 227.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 228.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 229.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 230.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 231.241.66.59.in-addr.arpa. domain name pointer th241231.ip.tsinghua.edu.cn
[86400] 232.241.66.59.in-addr.arpa. domain name pointer th241232.ip.tsinghua.edu.cn
[86400] 233.241.66.59.in-addr.arpa. domain name pointer th241233.ip.tsinghua.edu.cn
[86400] 234.241.66.59.in-addr.arpa. domain name pointer th241234.ip.tsinghua.edu.cn
[86400] 235.241.66.59.in-addr.arpa. domain name pointer th241235.ip.tsinghua.edu.cn
[86400] 236.241.66.59.in-addr.arpa. domain name pointer th241236.ip.tsinghua.edu.cn
[0] 237.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 238.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 239.241.66.59.in-addr.arpa. domain name pointer th241239.ip.tsinghua.edu.cn
[86400] 240.241.66.59.in-addr.arpa. domain name pointer th241240.ip.tsinghua.edu.cn
[0] 241.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 242.241.66.59.in-addr.arpa. domain name pointer th241242.ip.tsinghua.edu.cn
[0] 243.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 244.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 245.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 246.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 247.241.66.59.in-addr.arpa. domain name pointer th241247.ip.tsinghua.edu.cn
[86400] 248.241.66.59.in-addr.arpa. domain name pointer th241248.ip.tsinghua.edu.cn
[0] 249.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 250.241.66.59.in-addr.arpa.: temporary failure in name resolution
[0] 251.241.66.59.in-addr.arpa.: temporary failure in name resolution
[86400] 252.241.66.59.in-addr.arpa. domain name pointer th241252.ip.tsinghua.edu.cn
[86400] 253.241.66.59.in-addr.arpa. domain name pointer th241253.ip.tsinghua.edu.cn
[86400] 254.241.66.59.in-addr.arpa. domain name pointer th241254.ip.tsinghua.edu.cn
[0] 255.241.66.59.in-addr.arpa.: domain name does not exist