[0] 0.121.189.18.in-addr.arpa.: domain name does not exist
[0] 1.121.189.18.in-addr.arpa.: domain name does not exist
[0] 2.121.189.18.in-addr.arpa.: domain name does not exist
[0] 3.121.189.18.in-addr.arpa.: domain name does not exist
[0] 4.121.189.18.in-addr.arpa.: domain name does not exist
[0] 5.121.189.18.in-addr.arpa.: domain name does not exist
[0] 6.121.189.18.in-addr.arpa.: domain name does not exist
[0] 7.121.189.18.in-addr.arpa.: domain name does not exist
[0] 8.121.189.18.in-addr.arpa.: domain name does not exist
[0] 9.121.189.18.in-addr.arpa.: domain name does not exist
[60] 10.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-10.dyn.MIT.EDU
[0] 11.121.189.18.in-addr.arpa.: domain name does not exist
[60] 12.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-12.dyn.MIT.EDU
[0] 13.121.189.18.in-addr.arpa.: domain name does not exist
[60] 14.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-14.dyn.MIT.EDU
[0] 15.121.189.18.in-addr.arpa.: domain name does not exist
[0] 16.121.189.18.in-addr.arpa.: domain name does not exist
[0] 17.121.189.18.in-addr.arpa.: domain name does not exist
[60] 18.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-18.dyn.MIT.EDU
[60] 19.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-19.dyn.MIT.EDU
[60] 20.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-20.dyn.MIT.EDU
[0] 21.121.189.18.in-addr.arpa.: domain name does not exist
[0] 22.121.189.18.in-addr.arpa.: domain name does not exist
[60] 23.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-23.dyn.MIT.EDU
[60] 24.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-24.dyn.MIT.EDU
[0] 25.121.189.18.in-addr.arpa.: domain name does not exist
[60] 26.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-26.dyn.MIT.EDU
[0] 27.121.189.18.in-addr.arpa.: domain name does not exist
[0] 28.121.189.18.in-addr.arpa.: domain name does not exist
[60] 29.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-29.dyn.MIT.EDU
[60] 30.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-30.dyn.MIT.EDU
[0] 31.121.189.18.in-addr.arpa.: domain name does not exist
[60] 32.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-32.dyn.MIT.EDU
[60] 33.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-33.dyn.MIT.EDU
[60] 34.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-34.dyn.MIT.EDU
[60] 35.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-35.dyn.MIT.EDU
[0] 36.121.189.18.in-addr.arpa.: domain name does not exist
[60] 37.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-37.dyn.MIT.EDU
[0] 38.121.189.18.in-addr.arpa.: domain name does not exist
[60] 39.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-39.dyn.MIT.EDU
[60] 40.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-40.dyn.MIT.EDU
[0] 41.121.189.18.in-addr.arpa.: domain name does not exist
[60] 42.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-42.dyn.MIT.EDU
[60] 43.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-43.dyn.MIT.EDU
[60] 44.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-44.dyn.MIT.EDU
[60] 45.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-45.dyn.MIT.EDU
[60] 46.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-46.dyn.MIT.EDU
[60] 47.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-47.dyn.MIT.EDU
[0] 48.121.189.18.in-addr.arpa.: domain name does not exist
[0] 49.121.189.18.in-addr.arpa.: domain name does not exist
[60] 50.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-50.dyn.MIT.EDU
[0] 51.121.189.18.in-addr.arpa.: domain name does not exist
[0] 52.121.189.18.in-addr.arpa.: domain name does not exist
[60] 53.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-53.dyn.MIT.EDU
[60] 54.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-54.dyn.MIT.EDU
[0] 55.121.189.18.in-addr.arpa.: domain name does not exist
[60] 56.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-56.dyn.MIT.EDU
[60] 57.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-57.dyn.MIT.EDU
[0] 58.121.189.18.in-addr.arpa.: domain name does not exist
[60] 59.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-59.dyn.MIT.EDU
[60] 60.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-60.dyn.MIT.EDU
[0] 61.121.189.18.in-addr.arpa.: domain name does not exist
[0] 62.121.189.18.in-addr.arpa.: domain name does not exist
[60] 63.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-63.dyn.MIT.EDU
[0] 64.121.189.18.in-addr.arpa.: domain name does not exist
[60] 65.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-65.dyn.MIT.EDU
[60] 66.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-66.dyn.MIT.EDU
[0] 67.121.189.18.in-addr.arpa.: domain name does not exist
[60] 68.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-68.dyn.MIT.EDU
[60] 69.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-69.dyn.MIT.EDU
[0] 70.121.189.18.in-addr.arpa.: domain name does not exist
[60] 71.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-71.dyn.MIT.EDU
[0] 72.121.189.18.in-addr.arpa.: domain name does not exist
[60] 73.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-73.dyn.MIT.EDU
[0] 74.121.189.18.in-addr.arpa.: domain name does not exist
[0] 75.121.189.18.in-addr.arpa.: domain name does not exist
[0] 76.121.189.18.in-addr.arpa.: domain name does not exist
[60] 77.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-77.dyn.MIT.EDU
[0] 78.121.189.18.in-addr.arpa.: domain name does not exist
[0] 79.121.189.18.in-addr.arpa.: domain name does not exist
[60] 80.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-80.dyn.MIT.EDU
[60] 81.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-81.dyn.MIT.EDU
[0] 82.121.189.18.in-addr.arpa.: domain name does not exist
[60] 83.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-83.dyn.MIT.EDU
[60] 84.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-84.dyn.MIT.EDU
[60] 85.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-85.dyn.MIT.EDU
[60] 86.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-86.dyn.MIT.EDU
[60] 87.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-87.dyn.MIT.EDU
[60] 88.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-88.dyn.MIT.EDU
[0] 89.121.189.18.in-addr.arpa.: domain name does not exist
[60] 90.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-90.dyn.MIT.EDU
[0] 91.121.189.18.in-addr.arpa.: domain name does not exist
[60] 92.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-92.dyn.MIT.EDU
[0] 93.121.189.18.in-addr.arpa.: domain name does not exist
[60] 94.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-94.dyn.MIT.EDU
[0] 95.121.189.18.in-addr.arpa.: domain name does not exist
[60] 96.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-96.dyn.MIT.EDU
[0] 97.121.189.18.in-addr.arpa.: domain name does not exist
[0] 98.121.189.18.in-addr.arpa.: domain name does not exist
[0] 99.121.189.18.in-addr.arpa.: domain name does not exist
[0] 100.121.189.18.in-addr.arpa.: domain name does not exist
[0] 101.121.189.18.in-addr.arpa.: domain name does not exist
[60] 102.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-102.dyn.MIT.EDU
[60] 103.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-103.dyn.MIT.EDU
[60] 104.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-104.dyn.MIT.EDU
[60] 105.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-105.dyn.MIT.EDU
[0] 106.121.189.18.in-addr.arpa.: domain name does not exist
[60] 107.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-107.dyn.MIT.EDU
[0] 108.121.189.18.in-addr.arpa.: domain name does not exist
[60] 109.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-109.dyn.MIT.EDU
[0] 110.121.189.18.in-addr.arpa.: domain name does not exist
[60] 111.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-111.dyn.MIT.EDU
[60] 112.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-112.dyn.MIT.EDU
[60] 113.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-113.dyn.MIT.EDU
[0] 114.121.189.18.in-addr.arpa.: domain name does not exist
[60] 115.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-115.dyn.MIT.EDU
[0] 116.121.189.18.in-addr.arpa.: domain name does not exist
[60] 117.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-117.dyn.MIT.EDU
[60] 118.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-118.dyn.MIT.EDU
[60] 119.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-119.dyn.MIT.EDU
[60] 120.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-120.dyn.MIT.EDU
[0] 121.121.189.18.in-addr.arpa.: domain name does not exist
[60] 122.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-122.dyn.MIT.EDU
[60] 123.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-123.dyn.MIT.EDU
[0] 124.121.189.18.in-addr.arpa.: domain name does not exist
[60] 125.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-125.dyn.MIT.EDU
[0] 126.121.189.18.in-addr.arpa.: domain name does not exist
[0] 127.121.189.18.in-addr.arpa.: domain name does not exist
[60] 128.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-128.dyn.MIT.EDU
[0] 129.121.189.18.in-addr.arpa.: domain name does not exist
[60] 130.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-130.dyn.MIT.EDU
[60] 131.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-131.dyn.MIT.EDU
[60] 132.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-132.dyn.MIT.EDU
[60] 133.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-133.dyn.MIT.EDU
[60] 134.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-134.dyn.MIT.EDU
[0] 135.121.189.18.in-addr.arpa.: domain name does not exist
[60] 136.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-136.dyn.MIT.EDU
[60] 137.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-137.dyn.MIT.EDU
[60] 138.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-138.dyn.MIT.EDU
[0] 139.121.189.18.in-addr.arpa.: domain name does not exist
[0] 140.121.189.18.in-addr.arpa.: domain name does not exist
[60] 141.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-141.dyn.MIT.EDU
[0] 142.121.189.18.in-addr.arpa.: domain name does not exist
[0] 143.121.189.18.in-addr.arpa.: domain name does not exist
[60] 144.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-144.dyn.MIT.EDU
[60] 145.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-145.dyn.MIT.EDU
[60] 146.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-146.dyn.MIT.EDU
[60] 147.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-147.dyn.MIT.EDU
[60] 148.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-148.dyn.MIT.EDU
[60] 149.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-149.dyn.MIT.EDU
[0] 150.121.189.18.in-addr.arpa.: domain name does not exist
[0] 151.121.189.18.in-addr.arpa.: domain name does not exist
[60] 152.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-152.dyn.MIT.EDU
[0] 153.121.189.18.in-addr.arpa.: domain name does not exist
[0] 154.121.189.18.in-addr.arpa.: domain name does not exist
[60] 155.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-155.dyn.MIT.EDU
[60] 156.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-156.dyn.MIT.EDU
[60] 157.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-157.dyn.MIT.EDU
[60] 158.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-158.dyn.MIT.EDU
[60] 159.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-159.dyn.MIT.EDU
[0] 160.121.189.18.in-addr.arpa.: domain name does not exist
[60] 161.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-161.dyn.MIT.EDU
[60] 162.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-162.dyn.MIT.EDU
[0] 163.121.189.18.in-addr.arpa.: domain name does not exist
[60] 164.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-164.dyn.MIT.EDU
[60] 165.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-165.dyn.MIT.EDU
[60] 166.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-166.dyn.MIT.EDU
[60] 167.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-167.dyn.MIT.EDU
[0] 168.121.189.18.in-addr.arpa.: domain name does not exist
[0] 169.121.189.18.in-addr.arpa.: domain name does not exist
[60] 170.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-170.dyn.MIT.EDU
[60] 171.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-171.dyn.MIT.EDU
[60] 172.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-172.dyn.MIT.EDU
[60] 173.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-173.dyn.MIT.EDU
[0] 174.121.189.18.in-addr.arpa.: domain name does not exist
[0] 175.121.189.18.in-addr.arpa.: domain name does not exist
[60] 176.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-176.dyn.MIT.EDU
[0] 177.121.189.18.in-addr.arpa.: domain name does not exist
[60] 178.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-178.dyn.MIT.EDU
[60] 179.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-179.dyn.MIT.EDU
[60] 180.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-180.dyn.MIT.EDU
[0] 181.121.189.18.in-addr.arpa.: domain name does not exist
[60] 182.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-182.dyn.MIT.EDU
[60] 183.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-183.dyn.MIT.EDU
[60] 184.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-184.dyn.MIT.EDU
[60] 185.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-185.dyn.MIT.EDU
[0] 186.121.189.18.in-addr.arpa.: domain name does not exist
[60] 187.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-187.dyn.MIT.EDU
[60] 188.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-188.dyn.MIT.EDU
[0] 189.121.189.18.in-addr.arpa.: domain name does not exist
[60] 190.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-190.dyn.MIT.EDU
[60] 191.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-191.dyn.MIT.EDU
[0] 192.121.189.18.in-addr.arpa.: domain name does not exist
[60] 193.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-193.dyn.MIT.EDU
[60] 194.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-194.dyn.MIT.EDU
[60] 195.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-195.dyn.MIT.EDU
[60] 196.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-196.dyn.MIT.EDU
[60] 197.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-197.dyn.MIT.EDU
[0] 198.121.189.18.in-addr.arpa.: domain name does not exist
[0] 199.121.189.18.in-addr.arpa.: domain name does not exist
[60] 200.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-200.dyn.MIT.EDU
[60] 201.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-201.dyn.MIT.EDU
[0] 202.121.189.18.in-addr.arpa.: domain name does not exist
[60] 203.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-203.dyn.MIT.EDU
[60] 204.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-204.dyn.MIT.EDU
[60] 205.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-205.dyn.MIT.EDU
[0] 206.121.189.18.in-addr.arpa.: domain name does not exist
[60] 207.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-207.dyn.MIT.EDU
[60] 208.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-208.dyn.MIT.EDU
[60] 209.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-209.dyn.MIT.EDU
[0] 210.121.189.18.in-addr.arpa.: domain name does not exist
[0] 211.121.189.18.in-addr.arpa.: domain name does not exist
[0] 212.121.189.18.in-addr.arpa.: domain name does not exist
[0] 213.121.189.18.in-addr.arpa.: domain name does not exist
[60] 214.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-214.dyn.MIT.EDU
[60] 215.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-215.dyn.MIT.EDU
[60] 216.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-216.dyn.MIT.EDU
[60] 217.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-217.dyn.MIT.EDU
[0] 218.121.189.18.in-addr.arpa.: domain name does not exist
[0] 219.121.189.18.in-addr.arpa.: domain name does not exist
[60] 220.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-220.dyn.MIT.EDU
[0] 221.121.189.18.in-addr.arpa.: domain name does not exist
[60] 222.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-222.dyn.MIT.EDU
[0] 223.121.189.18.in-addr.arpa.: domain name does not exist
[0] 224.121.189.18.in-addr.arpa.: domain name does not exist
[60] 225.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-225.dyn.MIT.EDU
[60] 226.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-226.dyn.MIT.EDU
[60] 227.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-227.dyn.MIT.EDU
[60] 228.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-228.dyn.MIT.EDU
[0] 229.121.189.18.in-addr.arpa.: domain name does not exist
[0] 230.121.189.18.in-addr.arpa.: domain name does not exist
[60] 231.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-231.dyn.MIT.EDU
[60] 232.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-232.dyn.MIT.EDU
[60] 233.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-233.dyn.MIT.EDU
[60] 234.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-234.dyn.MIT.EDU
[0] 235.121.189.18.in-addr.arpa.: domain name does not exist
[60] 236.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-236.dyn.MIT.EDU
[60] 237.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-237.dyn.MIT.EDU
[0] 238.121.189.18.in-addr.arpa.: domain name does not exist
[60] 239.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-239.dyn.MIT.EDU
[60] 240.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-240.dyn.MIT.EDU
[60] 241.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-241.dyn.MIT.EDU
[60] 242.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-242.dyn.MIT.EDU
[60] 243.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-243.dyn.MIT.EDU
[0] 244.121.189.18.in-addr.arpa.: domain name does not exist
[60] 245.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-245.dyn.MIT.EDU
[60] 246.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-246.dyn.MIT.EDU
[0] 247.121.189.18.in-addr.arpa.: domain name does not exist
[60] 248.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-248.dyn.MIT.EDU
[0] 249.121.189.18.in-addr.arpa.: domain name does not exist
[60] 250.121.189.18.in-addr.arpa. domain name pointer dhcp-18-189-121-250.dyn.MIT.EDU
[0] 251.121.189.18.in-addr.arpa.: domain name does not exist
[0] 252.121.189.18.in-addr.arpa.: domain name does not exist
[0] 253.121.189.18.in-addr.arpa.: domain name does not exist
[0] 254.121.189.18.in-addr.arpa.: domain name does not exist
[0] 255.121.189.18.in-addr.arpa.: domain name does not exist