[0] 0.147.39.160.in-addr.arpa.: domain name does not exist
[0] 1.147.39.160.in-addr.arpa.: domain name does not exist
[3600] 2.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-2.dyn.columbia.edu
[3600] 3.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-3.dyn.columbia.edu
[3600] 4.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-4.dyn.columbia.edu
[3600] 5.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-5.dyn.columbia.edu
[3600] 6.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-6.dyn.columbia.edu
[3600] 7.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-7.dyn.columbia.edu
[3600] 8.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-8.dyn.columbia.edu
[3600] 9.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-9.dyn.columbia.edu
[3600] 10.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-10.dyn.columbia.edu
[3600] 11.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-11.dyn.columbia.edu
[3600] 12.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-12.dyn.columbia.edu
[3600] 13.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-13.dyn.columbia.edu
[3600] 14.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-14.dyn.columbia.edu
[3600] 15.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-15.dyn.columbia.edu
[3600] 16.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-16.dyn.columbia.edu
[3600] 17.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-17.dyn.columbia.edu
[3600] 18.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-18.dyn.columbia.edu
[3600] 19.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-19.dyn.columbia.edu
[3600] 20.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-20.dyn.columbia.edu
[3600] 21.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-21.dyn.columbia.edu
[3600] 22.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-22.dyn.columbia.edu
[3600] 23.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-23.dyn.columbia.edu
[3600] 24.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-24.dyn.columbia.edu
[3600] 25.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-25.dyn.columbia.edu
[3600] 26.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-26.dyn.columbia.edu
[3600] 27.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-27.dyn.columbia.edu
[3600] 28.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-28.dyn.columbia.edu
[3600] 29.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-29.dyn.columbia.edu
[3600] 30.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-30.dyn.columbia.edu
[3600] 31.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-31.dyn.columbia.edu
[3600] 32.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-32.dyn.columbia.edu
[3600] 33.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-33.dyn.columbia.edu
[3600] 34.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-34.dyn.columbia.edu
[3600] 35.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-35.dyn.columbia.edu
[3600] 36.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-36.dyn.columbia.edu
[3600] 37.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-37.dyn.columbia.edu
[3600] 38.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-38.dyn.columbia.edu
[3600] 39.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-39.dyn.columbia.edu
[3600] 40.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-40.dyn.columbia.edu
[3600] 41.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-41.dyn.columbia.edu
[3600] 42.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-42.dyn.columbia.edu
[3600] 43.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-43.dyn.columbia.edu
[3600] 44.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-44.dyn.columbia.edu
[3600] 45.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-45.dyn.columbia.edu
[3600] 46.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-46.dyn.columbia.edu
[3600] 47.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-47.dyn.columbia.edu
[3600] 48.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-48.dyn.columbia.edu
[3600] 49.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-49.dyn.columbia.edu
[3600] 50.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-50.dyn.columbia.edu
[3600] 51.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-51.dyn.columbia.edu
[3600] 52.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-52.dyn.columbia.edu
[3600] 53.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-53.dyn.columbia.edu
[3600] 54.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-54.dyn.columbia.edu
[3600] 55.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-55.dyn.columbia.edu
[3600] 56.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-56.dyn.columbia.edu
[3600] 57.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-57.dyn.columbia.edu
[3600] 58.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-58.dyn.columbia.edu
[3600] 59.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-59.dyn.columbia.edu
[3600] 60.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-60.dyn.columbia.edu
[3600] 61.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-61.dyn.columbia.edu
[3600] 62.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-62.dyn.columbia.edu
[3600] 63.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-63.dyn.columbia.edu
[3600] 64.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-64.dyn.columbia.edu
[3600] 65.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-65.dyn.columbia.edu
[3600] 66.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-66.dyn.columbia.edu
[3600] 67.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-67.dyn.columbia.edu
[3600] 68.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-68.dyn.columbia.edu
[3600] 69.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-69.dyn.columbia.edu
[3600] 70.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-70.dyn.columbia.edu
[3600] 71.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-71.dyn.columbia.edu
[3600] 72.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-72.dyn.columbia.edu
[3600] 73.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-73.dyn.columbia.edu
[3600] 74.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-74.dyn.columbia.edu
[3600] 75.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-75.dyn.columbia.edu
[3600] 76.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-76.dyn.columbia.edu
[3600] 77.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-77.dyn.columbia.edu
[3600] 78.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-78.dyn.columbia.edu
[3600] 79.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-79.dyn.columbia.edu
[3600] 80.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-80.dyn.columbia.edu
[3600] 81.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-81.dyn.columbia.edu
[3600] 82.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-82.dyn.columbia.edu
[3600] 83.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-83.dyn.columbia.edu
[3600] 84.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-84.dyn.columbia.edu
[3600] 85.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-85.dyn.columbia.edu
[3600] 86.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-86.dyn.columbia.edu
[3600] 87.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-87.dyn.columbia.edu
[3600] 88.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-88.dyn.columbia.edu
[3600] 89.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-89.dyn.columbia.edu
[3600] 90.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-90.dyn.columbia.edu
[3600] 91.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-91.dyn.columbia.edu
[3600] 92.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-92.dyn.columbia.edu
[3600] 93.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-93.dyn.columbia.edu
[3600] 94.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-94.dyn.columbia.edu
[3600] 95.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-95.dyn.columbia.edu
[3600] 96.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-96.dyn.columbia.edu
[3600] 97.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-97.dyn.columbia.edu
[3600] 98.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-98.dyn.columbia.edu
[3600] 99.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-99.dyn.columbia.edu
[3600] 100.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-100.dyn.columbia.edu
[3600] 101.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-101.dyn.columbia.edu
[3600] 102.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-102.dyn.columbia.edu
[3600] 103.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-103.dyn.columbia.edu
[3600] 104.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-104.dyn.columbia.edu
[3600] 105.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-105.dyn.columbia.edu
[3600] 106.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-106.dyn.columbia.edu
[3600] 107.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-107.dyn.columbia.edu
[3600] 108.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-108.dyn.columbia.edu
[3600] 109.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-109.dyn.columbia.edu
[3600] 110.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-110.dyn.columbia.edu
[3600] 111.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-111.dyn.columbia.edu
[3600] 112.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-112.dyn.columbia.edu
[3600] 113.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-113.dyn.columbia.edu
[3600] 114.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-114.dyn.columbia.edu
[3600] 115.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-115.dyn.columbia.edu
[3600] 116.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-116.dyn.columbia.edu
[3600] 117.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-117.dyn.columbia.edu
[3600] 118.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-118.dyn.columbia.edu
[3600] 119.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-119.dyn.columbia.edu
[3600] 120.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-120.dyn.columbia.edu
[3600] 121.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-121.dyn.columbia.edu
[3600] 122.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-122.dyn.columbia.edu
[3600] 123.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-123.dyn.columbia.edu
[3600] 124.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-124.dyn.columbia.edu
[3600] 125.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-125.dyn.columbia.edu
[3600] 126.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-126.dyn.columbia.edu
[3600] 127.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-127.dyn.columbia.edu
[3600] 128.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-128.dyn.columbia.edu
[3600] 129.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-129.dyn.columbia.edu
[3600] 130.147.39.160.in-addr.arpa. domain name pointer dyn-jj-147-130.dyn.columbia.edu
[0] 131.147.39.160.in-addr.arpa.: domain name does not exist
[0] 132.147.39.160.in-addr.arpa.: domain name does not exist
[0] 133.147.39.160.in-addr.arpa.: domain name does not exist
[0] 134.147.39.160.in-addr.arpa.: domain name does not exist
[0] 135.147.39.160.in-addr.arpa.: domain name does not exist
[0] 136.147.39.160.in-addr.arpa.: domain name does not exist
[3600] 137.147.39.160.in-addr.arpa. domain name pointer hrsgc87y01.health.columbia.edu
[0] 138.147.39.160.in-addr.arpa.: domain name does not exist
[3600] 139.147.39.160.in-addr.arpa. domain name pointer hrsjj0313x1ps.health.columbia.edu
[0] 140.147.39.160.in-addr.arpa.: domain name does not exist
[0] 141.147.39.160.in-addr.arpa.: domain name does not exist
[0] 142.147.39.160.in-addr.arpa.: domain name does not exist
[0] 143.147.39.160.in-addr.arpa.: domain name does not exist
[0] 144.147.39.160.in-addr.arpa.: domain name does not exist
[0] 145.147.39.160.in-addr.arpa.: domain name does not exist
[0] 146.147.39.160.in-addr.arpa.: domain name does not exist
[0] 147.147.39.160.in-addr.arpa.: domain name does not exist
[0] 148.147.39.160.in-addr.arpa.: domain name does not exist
[0] 149.147.39.160.in-addr.arpa.: domain name does not exist
[0] 150.147.39.160.in-addr.arpa.: domain name does not exist
[0] 151.147.39.160.in-addr.arpa.: domain name does not exist
[0] 152.147.39.160.in-addr.arpa.: domain name does not exist
[0] 153.147.39.160.in-addr.arpa.: domain name does not exist
[0] 154.147.39.160.in-addr.arpa.: domain name does not exist
[0] 155.147.39.160.in-addr.arpa.: domain name does not exist
[0] 156.147.39.160.in-addr.arpa.: domain name does not exist
[0] 157.147.39.160.in-addr.arpa.: domain name does not exist
[0] 158.147.39.160.in-addr.arpa.: domain name does not exist
[0] 159.147.39.160.in-addr.arpa.: domain name does not exist
[0] 160.147.39.160.in-addr.arpa.: domain name does not exist
[0] 161.147.39.160.in-addr.arpa.: domain name does not exist
[0] 162.147.39.160.in-addr.arpa.: domain name does not exist
[0] 163.147.39.160.in-addr.arpa.: domain name does not exist
[0] 164.147.39.160.in-addr.arpa.: domain name does not exist
[0] 165.147.39.160.in-addr.arpa.: domain name does not exist
[0] 166.147.39.160.in-addr.arpa.: domain name does not exist
[0] 167.147.39.160.in-addr.arpa.: domain name does not exist
[0] 168.147.39.160.in-addr.arpa.: domain name does not exist
[0] 169.147.39.160.in-addr.arpa.: domain name does not exist
[0] 170.147.39.160.in-addr.arpa.: domain name does not exist
[0] 171.147.39.160.in-addr.arpa.: domain name does not exist
[0] 172.147.39.160.in-addr.arpa.: domain name does not exist
[0] 173.147.39.160.in-addr.arpa.: domain name does not exist
[0] 174.147.39.160.in-addr.arpa.: domain name does not exist
[0] 175.147.39.160.in-addr.arpa.: domain name does not exist
[0] 176.147.39.160.in-addr.arpa.: domain name does not exist
[0] 177.147.39.160.in-addr.arpa.: domain name does not exist
[0] 178.147.39.160.in-addr.arpa.: domain name does not exist
[0] 179.147.39.160.in-addr.arpa.: domain name does not exist
[0] 180.147.39.160.in-addr.arpa.: domain name does not exist
[0] 181.147.39.160.in-addr.arpa.: domain name does not exist
[0] 182.147.39.160.in-addr.arpa.: domain name does not exist
[0] 183.147.39.160.in-addr.arpa.: domain name does not exist
[0] 184.147.39.160.in-addr.arpa.: domain name does not exist
[0] 185.147.39.160.in-addr.arpa.: domain name does not exist
[0] 186.147.39.160.in-addr.arpa.: domain name does not exist
[0] 187.147.39.160.in-addr.arpa.: domain name does not exist
[0] 188.147.39.160.in-addr.arpa.: domain name does not exist
[0] 189.147.39.160.in-addr.arpa.: domain name does not exist
[0] 190.147.39.160.in-addr.arpa.: domain name does not exist
[0] 191.147.39.160.in-addr.arpa.: domain name does not exist
[0] 192.147.39.160.in-addr.arpa.: domain name does not exist
[0] 193.147.39.160.in-addr.arpa.: domain name does not exist
[0] 194.147.39.160.in-addr.arpa.: domain name does not exist
[0] 195.147.39.160.in-addr.arpa.: domain name does not exist
[0] 196.147.39.160.in-addr.arpa.: domain name does not exist
[0] 197.147.39.160.in-addr.arpa.: domain name does not exist
[0] 198.147.39.160.in-addr.arpa.: domain name does not exist
[0] 199.147.39.160.in-addr.arpa.: domain name does not exist
[0] 200.147.39.160.in-addr.arpa.: domain name does not exist
[0] 201.147.39.160.in-addr.arpa.: domain name does not exist
[0] 202.147.39.160.in-addr.arpa.: domain name does not exist
[0] 203.147.39.160.in-addr.arpa.: domain name does not exist
[0] 204.147.39.160.in-addr.arpa.: domain name does not exist
[0] 205.147.39.160.in-addr.arpa.: domain name does not exist
[0] 206.147.39.160.in-addr.arpa.: domain name does not exist
[0] 207.147.39.160.in-addr.arpa.: domain name does not exist
[0] 208.147.39.160.in-addr.arpa.: domain name does not exist
[0] 209.147.39.160.in-addr.arpa.: domain name does not exist
[0] 210.147.39.160.in-addr.arpa.: domain name does not exist
[0] 211.147.39.160.in-addr.arpa.: domain name does not exist
[0] 212.147.39.160.in-addr.arpa.: domain name does not exist
[0] 213.147.39.160.in-addr.arpa.: domain name does not exist
[0] 214.147.39.160.in-addr.arpa.: domain name does not exist
[0] 215.147.39.160.in-addr.arpa.: domain name does not exist
[0] 216.147.39.160.in-addr.arpa.: domain name does not exist
[0] 217.147.39.160.in-addr.arpa.: domain name does not exist
[0] 218.147.39.160.in-addr.arpa.: domain name does not exist
[0] 219.147.39.160.in-addr.arpa.: domain name does not exist
[0] 220.147.39.160.in-addr.arpa.: domain name does not exist
[0] 221.147.39.160.in-addr.arpa.: domain name does not exist
[0] 222.147.39.160.in-addr.arpa.: domain name does not exist
[0] 223.147.39.160.in-addr.arpa.: domain name does not exist
[0] 224.147.39.160.in-addr.arpa.: domain name does not exist
[0] 225.147.39.160.in-addr.arpa.: domain name does not exist
[0] 226.147.39.160.in-addr.arpa.: domain name does not exist
[0] 227.147.39.160.in-addr.arpa.: domain name does not exist
[0] 228.147.39.160.in-addr.arpa.: domain name does not exist
[0] 229.147.39.160.in-addr.arpa.: domain name does not exist
[0] 230.147.39.160.in-addr.arpa.: domain name does not exist
[0] 231.147.39.160.in-addr.arpa.: domain name does not exist
[0] 232.147.39.160.in-addr.arpa.: domain name does not exist
[0] 233.147.39.160.in-addr.arpa.: domain name does not exist
[0] 234.147.39.160.in-addr.arpa.: domain name does not exist
[0] 235.147.39.160.in-addr.arpa.: domain name does not exist
[0] 236.147.39.160.in-addr.arpa.: domain name does not exist
[0] 237.147.39.160.in-addr.arpa.: domain name does not exist
[0] 238.147.39.160.in-addr.arpa.: domain name does not exist
[0] 239.147.39.160.in-addr.arpa.: domain name does not exist
[0] 240.147.39.160.in-addr.arpa.: domain name does not exist
[0] 241.147.39.160.in-addr.arpa.: domain name does not exist
[0] 242.147.39.160.in-addr.arpa.: domain name does not exist
[0] 243.147.39.160.in-addr.arpa.: domain name does not exist
[0] 244.147.39.160.in-addr.arpa.: domain name does not exist
[0] 245.147.39.160.in-addr.arpa.: domain name does not exist
[0] 246.147.39.160.in-addr.arpa.: domain name does not exist
[3600] 247.147.39.160.in-addr.arpa. domain name pointer jj-b-1-ups.net.columbia.edu
[3600] 248.147.39.160.in-addr.arpa. domain name pointer jj-6-1-ups.net.columbia.edu
[3600] 249.147.39.160.in-addr.arpa. domain name pointer jj-10-1-ups.net.columbia.edu
[3600] 250.147.39.160.in-addr.arpa. domain name pointer jj-14-1-ups.net.columbia.edu
[3600] 251.147.39.160.in-addr.arpa. domain name pointer jj-b-1.net.columbia.edu
[3600] 252.147.39.160.in-addr.arpa. domain name pointer jj-6-1.net.columbia.edu
[3600] 253.147.39.160.in-addr.arpa. domain name pointer jj-10-1.net.columbia.edu
[3600] 254.147.39.160.in-addr.arpa. domain name pointer jj-14-1.net.columbia.edu
[0] 255.147.39.160.in-addr.arpa.: domain name does not exist