[0] 0.31.189.18.in-addr.arpa.: domain name does not exist
[0] 1.31.189.18.in-addr.arpa.: domain name does not exist
[0] 2.31.189.18.in-addr.arpa.: domain name does not exist
[0] 3.31.189.18.in-addr.arpa.: domain name does not exist
[0] 4.31.189.18.in-addr.arpa.: domain name does not exist
[0] 5.31.189.18.in-addr.arpa.: domain name does not exist
[0] 6.31.189.18.in-addr.arpa.: domain name does not exist
[0] 7.31.189.18.in-addr.arpa.: domain name does not exist
[60] 8.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-8.dyn.MIT.EDU
[0] 9.31.189.18.in-addr.arpa.: domain name does not exist
[60] 10.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-10.dyn.MIT.EDU
[60] 11.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-11.dyn.MIT.EDU
[60] 12.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-12.dyn.MIT.EDU
[0] 13.31.189.18.in-addr.arpa.: domain name does not exist
[60] 14.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-14.dyn.MIT.EDU
[60] 15.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-15.dyn.MIT.EDU
[60] 16.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-16.dyn.MIT.EDU
[60] 17.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-17.dyn.MIT.EDU
[60] 18.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-18.dyn.MIT.EDU
[60] 19.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-19.dyn.MIT.EDU
[60] 20.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-20.dyn.MIT.EDU
[60] 21.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-21.dyn.MIT.EDU
[60] 22.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-22.dyn.MIT.EDU
[0] 23.31.189.18.in-addr.arpa.: domain name does not exist
[60] 24.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-24.dyn.MIT.EDU
[60] 25.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-25.dyn.MIT.EDU
[60] 26.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-26.dyn.MIT.EDU
[60] 27.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-27.dyn.MIT.EDU
[60] 28.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-28.dyn.MIT.EDU
[60] 29.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-29.dyn.MIT.EDU
[60] 30.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-30.dyn.MIT.EDU
[60] 31.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-31.dyn.MIT.EDU
[0] 32.31.189.18.in-addr.arpa.: domain name does not exist
[60] 33.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-33.dyn.MIT.EDU
[0] 34.31.189.18.in-addr.arpa.: domain name does not exist
[0] 35.31.189.18.in-addr.arpa.: domain name does not exist
[60] 36.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-36.dyn.MIT.EDU
[0] 37.31.189.18.in-addr.arpa.: domain name does not exist
[60] 38.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-38.dyn.MIT.EDU
[60] 39.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-39.dyn.MIT.EDU
[0] 40.31.189.18.in-addr.arpa.: domain name does not exist
[60] 41.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-41.dyn.MIT.EDU
[0] 42.31.189.18.in-addr.arpa.: domain name does not exist
[0] 43.31.189.18.in-addr.arpa.: domain name does not exist
[60] 44.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-44.dyn.MIT.EDU
[0] 45.31.189.18.in-addr.arpa.: domain name does not exist
[60] 46.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-46.dyn.MIT.EDU
[60] 47.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-47.dyn.MIT.EDU
[0] 48.31.189.18.in-addr.arpa.: domain name does not exist
[60] 49.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-49.dyn.MIT.EDU
[60] 50.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-50.dyn.MIT.EDU
[0] 51.31.189.18.in-addr.arpa.: domain name does not exist
[60] 52.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-52.dyn.MIT.EDU
[0] 53.31.189.18.in-addr.arpa.: domain name does not exist
[60] 54.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-54.dyn.MIT.EDU
[0] 55.31.189.18.in-addr.arpa.: domain name does not exist
[60] 56.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-56.dyn.MIT.EDU
[60] 57.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-57.dyn.MIT.EDU
[60] 58.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-58.dyn.MIT.EDU
[0] 59.31.189.18.in-addr.arpa.: domain name does not exist
[60] 60.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-60.dyn.MIT.EDU
[60] 61.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-61.dyn.MIT.EDU
[0] 62.31.189.18.in-addr.arpa.: domain name does not exist
[60] 63.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-63.dyn.MIT.EDU
[0] 64.31.189.18.in-addr.arpa.: domain name does not exist
[60] 65.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-65.dyn.MIT.EDU
[0] 66.31.189.18.in-addr.arpa.: domain name does not exist
[60] 67.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-67.dyn.MIT.EDU
[60] 68.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-68.dyn.MIT.EDU
[60] 69.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-69.dyn.MIT.EDU
[0] 70.31.189.18.in-addr.arpa.: domain name does not exist
[0] 71.31.189.18.in-addr.arpa.: domain name does not exist
[60] 72.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-72.dyn.MIT.EDU
[60] 73.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-73.dyn.MIT.EDU
[60] 74.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-74.dyn.MIT.EDU
[60] 75.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-75.dyn.MIT.EDU
[60] 76.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-76.dyn.MIT.EDU
[0] 77.31.189.18.in-addr.arpa.: domain name does not exist
[0] 78.31.189.18.in-addr.arpa.: domain name does not exist
[0] 79.31.189.18.in-addr.arpa.: domain name does not exist
[60] 80.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-80.dyn.MIT.EDU
[0] 81.31.189.18.in-addr.arpa.: domain name does not exist
[0] 82.31.189.18.in-addr.arpa.: domain name does not exist
[0] 83.31.189.18.in-addr.arpa.: domain name does not exist
[60] 84.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-84.dyn.MIT.EDU
[0] 85.31.189.18.in-addr.arpa.: domain name does not exist
[0] 86.31.189.18.in-addr.arpa.: domain name does not exist
[60] 87.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-87.dyn.MIT.EDU
[60] 88.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-88.dyn.MIT.EDU
[60] 89.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-89.dyn.MIT.EDU
[0] 90.31.189.18.in-addr.arpa.: domain name does not exist
[60] 91.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-91.dyn.MIT.EDU
[60] 92.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-92.dyn.MIT.EDU
[0] 93.31.189.18.in-addr.arpa.: domain name does not exist
[60] 94.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-94.dyn.MIT.EDU
[60] 95.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-95.dyn.MIT.EDU
[0] 96.31.189.18.in-addr.arpa.: domain name does not exist
[60] 97.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-97.dyn.MIT.EDU
[0] 98.31.189.18.in-addr.arpa.: domain name does not exist
[60] 99.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-99.dyn.MIT.EDU
[60] 100.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-100.dyn.MIT.EDU
[60] 101.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-101.dyn.MIT.EDU
[0] 102.31.189.18.in-addr.arpa.: domain name does not exist
[60] 103.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-103.dyn.MIT.EDU
[0] 104.31.189.18.in-addr.arpa.: domain name does not exist
[60] 105.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-105.dyn.MIT.EDU
[0] 106.31.189.18.in-addr.arpa.: domain name does not exist
[0] 107.31.189.18.in-addr.arpa.: domain name does not exist
[0] 108.31.189.18.in-addr.arpa.: domain name does not exist
[60] 109.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-109.dyn.MIT.EDU
[0] 110.31.189.18.in-addr.arpa.: domain name does not exist
[0] 111.31.189.18.in-addr.arpa.: domain name does not exist
[60] 112.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-112.dyn.MIT.EDU
[60] 113.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-113.dyn.MIT.EDU
[60] 114.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-114.dyn.MIT.EDU
[0] 115.31.189.18.in-addr.arpa.: domain name does not exist
[60] 116.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-116.dyn.MIT.EDU
[0] 117.31.189.18.in-addr.arpa.: domain name does not exist
[60] 118.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-118.dyn.MIT.EDU
[0] 119.31.189.18.in-addr.arpa.: domain name does not exist
[0] 120.31.189.18.in-addr.arpa.: domain name does not exist
[60] 121.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-121.dyn.MIT.EDU
[0] 122.31.189.18.in-addr.arpa.: domain name does not exist
[60] 123.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-123.dyn.MIT.EDU
[60] 124.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-124.dyn.MIT.EDU
[60] 125.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-125.dyn.MIT.EDU
[60] 126.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-126.dyn.MIT.EDU
[0] 127.31.189.18.in-addr.arpa.: domain name does not exist
[60] 128.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-128.dyn.MIT.EDU
[60] 129.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-129.dyn.MIT.EDU
[60] 130.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-130.dyn.MIT.EDU
[60] 131.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-131.dyn.MIT.EDU
[0] 132.31.189.18.in-addr.arpa.: domain name does not exist
[60] 133.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-133.dyn.MIT.EDU
[60] 134.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-134.dyn.MIT.EDU
[60] 135.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-135.dyn.MIT.EDU
[60] 136.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-136.dyn.MIT.EDU
[60] 137.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-137.dyn.MIT.EDU
[60] 138.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-138.dyn.MIT.EDU
[60] 139.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-139.dyn.MIT.EDU
[60] 140.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-140.dyn.MIT.EDU
[0] 141.31.189.18.in-addr.arpa.: domain name does not exist
[60] 142.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-142.dyn.MIT.EDU
[60] 143.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-143.dyn.MIT.EDU
[0] 144.31.189.18.in-addr.arpa.: domain name does not exist
[0] 145.31.189.18.in-addr.arpa.: domain name does not exist
[0] 146.31.189.18.in-addr.arpa.: domain name does not exist
[60] 147.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-147.dyn.MIT.EDU
[0] 148.31.189.18.in-addr.arpa.: domain name does not exist
[60] 149.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-149.dyn.MIT.EDU
[0] 150.31.189.18.in-addr.arpa.: domain name does not exist
[60] 151.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-151.dyn.MIT.EDU
[60] 152.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-152.dyn.MIT.EDU
[60] 153.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-153.dyn.MIT.EDU
[0] 154.31.189.18.in-addr.arpa.: domain name does not exist
[0] 155.31.189.18.in-addr.arpa.: domain name does not exist
[0] 156.31.189.18.in-addr.arpa.: domain name does not exist
[0] 157.31.189.18.in-addr.arpa.: domain name does not exist
[60] 158.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-158.dyn.MIT.EDU
[0] 159.31.189.18.in-addr.arpa.: domain name does not exist
[0] 160.31.189.18.in-addr.arpa.: domain name does not exist
[0] 161.31.189.18.in-addr.arpa.: domain name does not exist
[60] 162.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-162.dyn.MIT.EDU
[60] 163.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-163.dyn.MIT.EDU
[60] 164.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-164.dyn.MIT.EDU
[60] 165.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-165.dyn.MIT.EDU
[0] 166.31.189.18.in-addr.arpa.: domain name does not exist
[60] 167.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-167.dyn.MIT.EDU
[0] 168.31.189.18.in-addr.arpa.: domain name does not exist
[60] 169.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-169.dyn.MIT.EDU
[0] 170.31.189.18.in-addr.arpa.: domain name does not exist
[60] 171.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-171.dyn.MIT.EDU
[0] 172.31.189.18.in-addr.arpa.: domain name does not exist
[60] 173.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-173.dyn.MIT.EDU
[60] 174.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-174.dyn.MIT.EDU
[60] 175.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-175.dyn.MIT.EDU
[0] 176.31.189.18.in-addr.arpa.: domain name does not exist
[0] 177.31.189.18.in-addr.arpa.: domain name does not exist
[60] 178.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-178.dyn.MIT.EDU
[0] 179.31.189.18.in-addr.arpa.: domain name does not exist
[0] 180.31.189.18.in-addr.arpa.: domain name does not exist
[0] 181.31.189.18.in-addr.arpa.: domain name does not exist
[60] 182.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-182.dyn.MIT.EDU
[60] 183.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-183.dyn.MIT.EDU
[0] 184.31.189.18.in-addr.arpa.: domain name does not exist
[60] 185.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-185.dyn.MIT.EDU
[60] 186.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-186.dyn.MIT.EDU
[60] 187.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-187.dyn.MIT.EDU
[0] 188.31.189.18.in-addr.arpa.: domain name does not exist
[60] 189.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-189.dyn.MIT.EDU
[60] 190.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-190.dyn.MIT.EDU
[0] 191.31.189.18.in-addr.arpa.: domain name does not exist
[60] 192.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-192.dyn.MIT.EDU
[60] 193.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-193.dyn.MIT.EDU
[60] 194.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-194.dyn.MIT.EDU
[0] 195.31.189.18.in-addr.arpa.: domain name does not exist
[60] 196.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-196.dyn.MIT.EDU
[60] 197.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-197.dyn.MIT.EDU
[60] 198.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-198.dyn.MIT.EDU
[60] 199.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-199.dyn.MIT.EDU
[0] 200.31.189.18.in-addr.arpa.: domain name does not exist
[60] 201.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-201.dyn.MIT.EDU
[60] 202.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-202.dyn.MIT.EDU
[60] 203.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-203.dyn.MIT.EDU
[0] 204.31.189.18.in-addr.arpa.: domain name does not exist
[60] 205.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-205.dyn.MIT.EDU
[0] 206.31.189.18.in-addr.arpa.: domain name does not exist
[60] 207.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-207.dyn.MIT.EDU
[60] 208.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-208.dyn.MIT.EDU
[0] 209.31.189.18.in-addr.arpa.: domain name does not exist
[60] 210.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-210.dyn.MIT.EDU
[0] 211.31.189.18.in-addr.arpa.: domain name does not exist
[0] 212.31.189.18.in-addr.arpa.: domain name does not exist
[0] 213.31.189.18.in-addr.arpa.: domain name does not exist
[0] 214.31.189.18.in-addr.arpa.: domain name does not exist
[60] 215.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-215.dyn.MIT.EDU
[0] 216.31.189.18.in-addr.arpa.: domain name does not exist
[0] 217.31.189.18.in-addr.arpa.: domain name does not exist
[60] 218.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-218.dyn.MIT.EDU
[0] 219.31.189.18.in-addr.arpa.: domain name does not exist
[60] 220.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-220.dyn.MIT.EDU
[60] 221.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-221.dyn.MIT.EDU
[0] 222.31.189.18.in-addr.arpa.: domain name does not exist
[60] 223.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-223.dyn.MIT.EDU
[60] 224.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-224.dyn.MIT.EDU
[60] 225.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-225.dyn.MIT.EDU
[0] 226.31.189.18.in-addr.arpa.: domain name does not exist
[60] 227.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-227.dyn.MIT.EDU
[60] 228.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-228.dyn.MIT.EDU
[0] 229.31.189.18.in-addr.arpa.: domain name does not exist
[60] 230.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-230.dyn.MIT.EDU
[60] 231.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-231.dyn.MIT.EDU
[0] 232.31.189.18.in-addr.arpa.: domain name does not exist
[60] 233.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-233.dyn.MIT.EDU
[0] 234.31.189.18.in-addr.arpa.: domain name does not exist
[0] 235.31.189.18.in-addr.arpa.: domain name does not exist
[0] 236.31.189.18.in-addr.arpa.: domain name does not exist
[0] 237.31.189.18.in-addr.arpa.: domain name does not exist
[0] 238.31.189.18.in-addr.arpa.: domain name does not exist
[60] 239.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-239.dyn.MIT.EDU
[0] 240.31.189.18.in-addr.arpa.: domain name does not exist
[0] 241.31.189.18.in-addr.arpa.: domain name does not exist
[60] 242.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-242.dyn.MIT.EDU
[60] 243.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-243.dyn.MIT.EDU
[60] 244.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-244.dyn.MIT.EDU
[60] 245.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-245.dyn.MIT.EDU
[0] 246.31.189.18.in-addr.arpa.: domain name does not exist
[60] 247.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-247.dyn.MIT.EDU
[0] 248.31.189.18.in-addr.arpa.: domain name does not exist
[60] 249.31.189.18.in-addr.arpa. domain name pointer dhcp-18-189-31-249.dyn.MIT.EDU
[0] 250.31.189.18.in-addr.arpa.: domain name does not exist
[0] 251.31.189.18.in-addr.arpa.: domain name does not exist
[0] 252.31.189.18.in-addr.arpa.: domain name does not exist
[0] 253.31.189.18.in-addr.arpa.: domain name does not exist
[0] 254.31.189.18.in-addr.arpa.: domain name does not exist
[0] 255.31.189.18.in-addr.arpa.: domain name does not exist