[0] 0.90.37.138.in-addr.arpa.: domain name does not exist
[1800] 1.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-1.dcs.qmul.ac.uk
[1800] 2.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-2.dcs.qmul.ac.uk
[1800] 3.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-3.dcs.qmul.ac.uk
[1800] 4.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-4.dcs.qmul.ac.uk
[1800] 5.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-5.dcs.qmul.ac.uk
[1800] 6.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-6.dcs.qmul.ac.uk
[1800] 7.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-7.dcs.qmul.ac.uk
[1800] 8.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-8.dcs.qmul.ac.uk
[1800] 9.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-9.dcs.qmul.ac.uk
[1800] 10.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-10.dcs.qmul.ac.uk
[1800] 11.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-11.dcs.qmul.ac.uk
[1800] 12.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-12.dcs.qmul.ac.uk
[1800] 13.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-13.dcs.qmul.ac.uk
[1800] 14.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-14.dcs.qmul.ac.uk
[1800] 15.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-15.dcs.qmul.ac.uk
[1800] 16.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-16.dcs.qmul.ac.uk
[1800] 17.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-17.dcs.qmul.ac.uk
[1800] 18.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-18.dcs.qmul.ac.uk
[1800] 19.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-19.dcs.qmul.ac.uk
[1800] 20.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-20.dcs.qmul.ac.uk
[1800] 21.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-21.dcs.qmul.ac.uk
[1800] 22.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-22.dcs.qmul.ac.uk
[1800] 23.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-23.dcs.qmul.ac.uk
[1800] 24.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-24.dcs.qmul.ac.uk
[1800] 25.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-25.dcs.qmul.ac.uk
[1800] 26.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-26.dcs.qmul.ac.uk
[1800] 27.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-27.dcs.qmul.ac.uk
[1800] 28.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-28.dcs.qmul.ac.uk
[1800] 29.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-29.dcs.qmul.ac.uk
[1800] 30.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-30.dcs.qmul.ac.uk
[1800] 31.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-31.dcs.qmul.ac.uk
[1800] 32.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-32.dcs.qmul.ac.uk
[1800] 33.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-33.dcs.qmul.ac.uk
[1800] 34.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-34.dcs.qmul.ac.uk
[1800] 35.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-35.dcs.qmul.ac.uk
[1800] 36.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-36.dcs.qmul.ac.uk
[1800] 37.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-37.dcs.qmul.ac.uk
[1800] 38.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-38.dcs.qmul.ac.uk
[1800] 39.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-39.dcs.qmul.ac.uk
[1800] 40.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-40.dcs.qmul.ac.uk
[1800] 41.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-41.dcs.qmul.ac.uk
[1800] 42.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-42.dcs.qmul.ac.uk
[1800] 43.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-43.dcs.qmul.ac.uk
[1800] 44.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-44.dcs.qmul.ac.uk
[1800] 45.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-45.dcs.qmul.ac.uk
[1800] 46.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-46.dcs.qmul.ac.uk
[1800] 47.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-47.dcs.qmul.ac.uk
[1800] 48.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-48.dcs.qmul.ac.uk
[1800] 49.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-49.dcs.qmul.ac.uk
[1800] 50.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-50.dcs.qmul.ac.uk
[1800] 51.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-51.dcs.qmul.ac.uk
[1800] 52.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-52.dcs.qmul.ac.uk
[1800] 53.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-53.dcs.qmul.ac.uk
[1800] 54.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-54.dcs.qmul.ac.uk
[1800] 55.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-55.dcs.qmul.ac.uk
[1800] 56.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-56.dcs.qmul.ac.uk
[1800] 57.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-57.dcs.qmul.ac.uk
[1800] 58.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-58.dcs.qmul.ac.uk
[1800] 59.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-59.dcs.qmul.ac.uk
[1800] 60.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-60.dcs.qmul.ac.uk
[1800] 61.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-61.dcs.qmul.ac.uk
[1800] 62.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-62.dcs.qmul.ac.uk
[1800] 63.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-63.dcs.qmul.ac.uk
[1800] 64.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-64.dcs.qmul.ac.uk
[1800] 65.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-65.dcs.qmul.ac.uk
[1800] 66.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-66.dcs.qmul.ac.uk
[1800] 67.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-67.dcs.qmul.ac.uk
[1800] 68.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-68.dcs.qmul.ac.uk
[1800] 69.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-69.dcs.qmul.ac.uk
[1800] 70.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-70.dcs.qmul.ac.uk
[1800] 71.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-71.dcs.qmul.ac.uk
[1800] 72.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-72.dcs.qmul.ac.uk
[1800] 73.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-73.dcs.qmul.ac.uk
[1800] 74.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-74.dcs.qmul.ac.uk
[1800] 75.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-75.dcs.qmul.ac.uk
[1800] 76.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-76.dcs.qmul.ac.uk
[1800] 77.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-77.dcs.qmul.ac.uk
[1800] 78.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-78.dcs.qmul.ac.uk
[1800] 79.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-79.dcs.qmul.ac.uk
[1800] 80.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-80.dcs.qmul.ac.uk
[1800] 81.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-81.dcs.qmul.ac.uk
[1800] 82.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-82.dcs.qmul.ac.uk
[1800] 83.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-83.dcs.qmul.ac.uk
[1800] 84.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-84.dcs.qmul.ac.uk
[1800] 85.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-85.dcs.qmul.ac.uk
[1800] 86.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-86.dcs.qmul.ac.uk
[1800] 87.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-87.dcs.qmul.ac.uk
[1800] 88.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-88.dcs.qmul.ac.uk
[1800] 89.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-89.dcs.qmul.ac.uk
[1800] 90.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-90.dcs.qmul.ac.uk
[1800] 91.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-91.dcs.qmul.ac.uk
[1800] 92.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-92.dcs.qmul.ac.uk
[1800] 93.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-93.dcs.qmul.ac.uk
[1800] 94.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-94.dcs.qmul.ac.uk
[1800] 95.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-95.dcs.qmul.ac.uk
[1800] 96.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-96.dcs.qmul.ac.uk
[1800] 97.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-97.dcs.qmul.ac.uk
[1800] 98.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-98.dcs.qmul.ac.uk
[1800] 99.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-99.dcs.qmul.ac.uk
[1800] 100.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-100.dcs.qmul.ac.uk
[1800] 101.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-101.dcs.qmul.ac.uk
[1800] 102.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-102.dcs.qmul.ac.uk
[1800] 103.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-103.dcs.qmul.ac.uk
[1800] 104.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-104.dcs.qmul.ac.uk
[1800] 105.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-105.dcs.qmul.ac.uk
[1800] 106.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-106.dcs.qmul.ac.uk
[1800] 107.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-107.dcs.qmul.ac.uk
[1800] 108.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-108.dcs.qmul.ac.uk
[1800] 109.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-109.dcs.qmul.ac.uk
[1800] 110.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-110.dcs.qmul.ac.uk
[1800] 111.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-111.dcs.qmul.ac.uk
[1800] 112.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-112.dcs.qmul.ac.uk
[1800] 113.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-113.dcs.qmul.ac.uk
[1800] 114.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-114.dcs.qmul.ac.uk
[1800] 115.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-115.dcs.qmul.ac.uk
[1800] 116.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-116.dcs.qmul.ac.uk
[1800] 117.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-117.dcs.qmul.ac.uk
[1800] 118.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-118.dcs.qmul.ac.uk
[1800] 119.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-119.dcs.qmul.ac.uk
[1800] 120.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-120.dcs.qmul.ac.uk
[1800] 121.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-121.dcs.qmul.ac.uk
[1800] 122.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-122.dcs.qmul.ac.uk
[1800] 123.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-123.dcs.qmul.ac.uk
[1800] 124.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-124.dcs.qmul.ac.uk
[1800] 125.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-125.dcs.qmul.ac.uk
[1800] 126.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-126.dcs.qmul.ac.uk
[1800] 127.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-127.dcs.qmul.ac.uk
[1800] 128.90.37.138.in-addr.arpa. domain name pointer hst138-37-90-128.dcs.qmul.ac.uk
[0] 129.90.37.138.in-addr.arpa.: domain name does not exist
[0] 130.90.37.138.in-addr.arpa.: domain name does not exist
[0] 131.90.37.138.in-addr.arpa.: domain name does not exist
[0] 132.90.37.138.in-addr.arpa.: domain name does not exist
[0] 133.90.37.138.in-addr.arpa.: domain name does not exist
[0] 134.90.37.138.in-addr.arpa.: domain name does not exist
[0] 135.90.37.138.in-addr.arpa.: domain name does not exist
[0] 136.90.37.138.in-addr.arpa.: domain name does not exist
[0] 137.90.37.138.in-addr.arpa.: domain name does not exist
[0] 138.90.37.138.in-addr.arpa.: domain name does not exist
[0] 139.90.37.138.in-addr.arpa.: domain name does not exist
[0] 140.90.37.138.in-addr.arpa.: domain name does not exist
[0] 141.90.37.138.in-addr.arpa.: domain name does not exist
[0] 142.90.37.138.in-addr.arpa.: domain name does not exist
[0] 143.90.37.138.in-addr.arpa.: domain name does not exist
[0] 144.90.37.138.in-addr.arpa.: domain name does not exist
[0] 145.90.37.138.in-addr.arpa.: domain name does not exist
[0] 146.90.37.138.in-addr.arpa.: domain name does not exist
[0] 147.90.37.138.in-addr.arpa.: domain name does not exist
[0] 148.90.37.138.in-addr.arpa.: domain name does not exist
[0] 149.90.37.138.in-addr.arpa.: domain name does not exist
[0] 150.90.37.138.in-addr.arpa.: domain name does not exist
[0] 151.90.37.138.in-addr.arpa.: domain name does not exist
[0] 152.90.37.138.in-addr.arpa.: domain name does not exist
[0] 153.90.37.138.in-addr.arpa.: domain name does not exist
[0] 154.90.37.138.in-addr.arpa.: domain name does not exist
[0] 155.90.37.138.in-addr.arpa.: domain name does not exist
[0] 156.90.37.138.in-addr.arpa.: domain name does not exist
[0] 157.90.37.138.in-addr.arpa.: domain name does not exist
[0] 158.90.37.138.in-addr.arpa.: domain name does not exist
[0] 159.90.37.138.in-addr.arpa.: domain name does not exist
[0] 160.90.37.138.in-addr.arpa.: domain name does not exist
[0] 161.90.37.138.in-addr.arpa.: domain name does not exist
[0] 162.90.37.138.in-addr.arpa.: domain name does not exist
[0] 163.90.37.138.in-addr.arpa.: domain name does not exist
[0] 164.90.37.138.in-addr.arpa.: domain name does not exist
[0] 165.90.37.138.in-addr.arpa.: domain name does not exist
[0] 166.90.37.138.in-addr.arpa.: domain name does not exist
[0] 167.90.37.138.in-addr.arpa.: domain name does not exist
[0] 168.90.37.138.in-addr.arpa.: domain name does not exist
[0] 169.90.37.138.in-addr.arpa.: domain name does not exist
[0] 170.90.37.138.in-addr.arpa.: domain name does not exist
[0] 171.90.37.138.in-addr.arpa.: domain name does not exist
[0] 172.90.37.138.in-addr.arpa.: domain name does not exist
[0] 173.90.37.138.in-addr.arpa.: domain name does not exist
[0] 174.90.37.138.in-addr.arpa.: domain name does not exist
[0] 175.90.37.138.in-addr.arpa.: domain name does not exist
[0] 176.90.37.138.in-addr.arpa.: domain name does not exist
[0] 177.90.37.138.in-addr.arpa.: domain name does not exist
[0] 178.90.37.138.in-addr.arpa.: domain name does not exist
[0] 179.90.37.138.in-addr.arpa.: domain name does not exist
[0] 180.90.37.138.in-addr.arpa.: domain name does not exist
[0] 181.90.37.138.in-addr.arpa.: domain name does not exist
[0] 182.90.37.138.in-addr.arpa.: domain name does not exist
[0] 183.90.37.138.in-addr.arpa.: domain name does not exist
[0] 184.90.37.138.in-addr.arpa.: domain name does not exist
[0] 185.90.37.138.in-addr.arpa.: domain name does not exist
[0] 186.90.37.138.in-addr.arpa.: domain name does not exist
[0] 187.90.37.138.in-addr.arpa.: domain name does not exist
[0] 188.90.37.138.in-addr.arpa.: domain name does not exist
[0] 189.90.37.138.in-addr.arpa.: domain name does not exist
[0] 190.90.37.138.in-addr.arpa.: domain name does not exist
[0] 191.90.37.138.in-addr.arpa.: domain name does not exist
[0] 192.90.37.138.in-addr.arpa.: domain name does not exist
[0] 193.90.37.138.in-addr.arpa.: domain name does not exist
[0] 194.90.37.138.in-addr.arpa.: domain name does not exist
[0] 195.90.37.138.in-addr.arpa.: domain name does not exist
[0] 196.90.37.138.in-addr.arpa.: domain name does not exist
[0] 197.90.37.138.in-addr.arpa.: domain name does not exist
[0] 198.90.37.138.in-addr.arpa.: domain name does not exist
[0] 199.90.37.138.in-addr.arpa.: domain name does not exist
[0] 200.90.37.138.in-addr.arpa.: domain name does not exist
[0] 201.90.37.138.in-addr.arpa.: domain name does not exist
[0] 202.90.37.138.in-addr.arpa.: domain name does not exist
[0] 203.90.37.138.in-addr.arpa.: domain name does not exist
[0] 204.90.37.138.in-addr.arpa.: domain name does not exist
[0] 205.90.37.138.in-addr.arpa.: domain name does not exist
[0] 206.90.37.138.in-addr.arpa.: domain name does not exist
[0] 207.90.37.138.in-addr.arpa.: domain name does not exist
[0] 208.90.37.138.in-addr.arpa.: domain name does not exist
[0] 209.90.37.138.in-addr.arpa.: domain name does not exist
[0] 210.90.37.138.in-addr.arpa.: domain name does not exist
[0] 211.90.37.138.in-addr.arpa.: domain name does not exist
[0] 212.90.37.138.in-addr.arpa.: domain name does not exist
[0] 213.90.37.138.in-addr.arpa.: domain name does not exist
[0] 214.90.37.138.in-addr.arpa.: domain name does not exist
[0] 215.90.37.138.in-addr.arpa.: domain name does not exist
[0] 216.90.37.138.in-addr.arpa.: domain name does not exist
[0] 217.90.37.138.in-addr.arpa.: domain name does not exist
[0] 218.90.37.138.in-addr.arpa.: domain name does not exist
[0] 219.90.37.138.in-addr.arpa.: domain name does not exist
[0] 220.90.37.138.in-addr.arpa.: domain name does not exist
[0] 221.90.37.138.in-addr.arpa.: domain name does not exist
[0] 222.90.37.138.in-addr.arpa.: domain name does not exist
[0] 223.90.37.138.in-addr.arpa.: domain name does not exist
[0] 224.90.37.138.in-addr.arpa.: domain name does not exist
[0] 225.90.37.138.in-addr.arpa.: domain name does not exist
[0] 226.90.37.138.in-addr.arpa.: domain name does not exist
[0] 227.90.37.138.in-addr.arpa.: domain name does not exist
[0] 228.90.37.138.in-addr.arpa.: domain name does not exist
[0] 229.90.37.138.in-addr.arpa.: domain name does not exist
[0] 230.90.37.138.in-addr.arpa.: domain name does not exist
[0] 231.90.37.138.in-addr.arpa.: domain name does not exist
[0] 232.90.37.138.in-addr.arpa.: domain name does not exist
[0] 233.90.37.138.in-addr.arpa.: domain name does not exist
[0] 234.90.37.138.in-addr.arpa.: domain name does not exist
[0] 235.90.37.138.in-addr.arpa.: domain name does not exist
[0] 236.90.37.138.in-addr.arpa.: domain name does not exist
[0] 237.90.37.138.in-addr.arpa.: domain name does not exist
[0] 238.90.37.138.in-addr.arpa.: domain name does not exist
[0] 239.90.37.138.in-addr.arpa.: domain name does not exist
[0] 240.90.37.138.in-addr.arpa.: domain name does not exist
[0] 241.90.37.138.in-addr.arpa.: domain name does not exist
[0] 242.90.37.138.in-addr.arpa.: domain name does not exist
[0] 243.90.37.138.in-addr.arpa.: domain name does not exist
[0] 244.90.37.138.in-addr.arpa.: domain name does not exist
[0] 245.90.37.138.in-addr.arpa.: domain name does not exist
[0] 246.90.37.138.in-addr.arpa.: domain name does not exist
[0] 247.90.37.138.in-addr.arpa.: domain name does not exist
[0] 248.90.37.138.in-addr.arpa.: domain name does not exist
[0] 249.90.37.138.in-addr.arpa.: domain name does not exist
[0] 250.90.37.138.in-addr.arpa.: domain name does not exist
[0] 251.90.37.138.in-addr.arpa.: domain name does not exist
[0] 252.90.37.138.in-addr.arpa.: domain name does not exist
[0] 253.90.37.138.in-addr.arpa.: domain name does not exist
[1800] 254.90.37.138.in-addr.arpa. domain name pointer dcs201-router-int.dcs.qmul.ac.uk
[0] 255.90.37.138.in-addr.arpa.: domain name does not exist