[0] 0.23.189.18.in-addr.arpa.: domain name does not exist
[0] 1.23.189.18.in-addr.arpa.: domain name does not exist
[0] 2.23.189.18.in-addr.arpa.: domain name does not exist
[0] 3.23.189.18.in-addr.arpa.: domain name does not exist
[0] 4.23.189.18.in-addr.arpa.: domain name does not exist
[0] 5.23.189.18.in-addr.arpa.: domain name does not exist
[0] 6.23.189.18.in-addr.arpa.: domain name does not exist
[60] 7.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-7.dyn.mit.edu
[60] 8.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-8.dyn.mit.edu
[60] 9.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-9.dyn.mit.edu
[60] 10.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-10.dyn.mit.edu
[60] 11.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-11.dyn.mit.edu
[60] 12.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-12.dyn.mit.edu
[60] 13.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-13.dyn.mit.edu
[0] 14.23.189.18.in-addr.arpa.: domain name does not exist
[0] 15.23.189.18.in-addr.arpa.: domain name does not exist
[0] 16.23.189.18.in-addr.arpa.: domain name does not exist
[0] 17.23.189.18.in-addr.arpa.: domain name does not exist
[60] 18.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-18.dyn.mit.edu
[0] 19.23.189.18.in-addr.arpa.: domain name does not exist
[60] 20.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-20.dyn.mit.edu
[0] 21.23.189.18.in-addr.arpa.: domain name does not exist
[0] 22.23.189.18.in-addr.arpa.: domain name does not exist
[60] 23.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-23.dyn.mit.edu
[60] 24.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-24.dyn.mit.edu
[0] 25.23.189.18.in-addr.arpa.: domain name does not exist
[0] 26.23.189.18.in-addr.arpa.: domain name does not exist
[0] 27.23.189.18.in-addr.arpa.: domain name does not exist
[60] 28.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-28.dyn.mit.edu
[0] 29.23.189.18.in-addr.arpa.: domain name does not exist
[60] 30.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-30.dyn.mit.edu
[60] 31.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-31.dyn.mit.edu
[0] 32.23.189.18.in-addr.arpa.: domain name does not exist
[0] 33.23.189.18.in-addr.arpa.: domain name does not exist
[0] 34.23.189.18.in-addr.arpa.: domain name does not exist
[60] 35.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-35.dyn.mit.edu
[0] 36.23.189.18.in-addr.arpa.: domain name does not exist
[60] 37.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-37.dyn.mit.edu
[60] 38.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-38.dyn.mit.edu
[0] 39.23.189.18.in-addr.arpa.: domain name does not exist
[0] 40.23.189.18.in-addr.arpa.: domain name does not exist
[0] 41.23.189.18.in-addr.arpa.: domain name does not exist
[60] 42.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-42.dyn.mit.edu
[60] 43.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-43.dyn.mit.edu
[60] 44.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-44.dyn.mit.edu
[0] 45.23.189.18.in-addr.arpa.: domain name does not exist
[0] 46.23.189.18.in-addr.arpa.: domain name does not exist
[60] 47.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-47.dyn.mit.edu
[0] 48.23.189.18.in-addr.arpa.: domain name does not exist
[60] 49.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-49.dyn.mit.edu
[0] 50.23.189.18.in-addr.arpa.: domain name does not exist
[0] 51.23.189.18.in-addr.arpa.: domain name does not exist
[0] 52.23.189.18.in-addr.arpa.: domain name does not exist
[60] 53.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-53.dyn.mit.edu
[60] 54.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-54.dyn.mit.edu
[60] 55.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-55.dyn.mit.edu
[0] 56.23.189.18.in-addr.arpa.: domain name does not exist
[60] 57.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-57.dyn.mit.edu
[60] 58.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-58.dyn.mit.edu
[0] 59.23.189.18.in-addr.arpa.: domain name does not exist
[60] 60.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-60.dyn.mit.edu
[60] 61.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-61.dyn.mit.edu
[60] 62.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-62.dyn.mit.edu
[0] 63.23.189.18.in-addr.arpa.: domain name does not exist
[60] 64.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-64.dyn.mit.edu
[0] 65.23.189.18.in-addr.arpa.: domain name does not exist
[60] 66.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-66.dyn.mit.edu
[0] 67.23.189.18.in-addr.arpa.: domain name does not exist
[60] 68.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-68.dyn.mit.edu
[60] 69.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-69.dyn.mit.edu
[0] 70.23.189.18.in-addr.arpa.: domain name does not exist
[0] 71.23.189.18.in-addr.arpa.: domain name does not exist
[60] 72.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-72.dyn.mit.edu
[60] 73.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-73.dyn.mit.edu
[0] 74.23.189.18.in-addr.arpa.: domain name does not exist
[60] 75.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-75.dyn.mit.edu
[0] 76.23.189.18.in-addr.arpa.: domain name does not exist
[60] 77.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-77.dyn.mit.edu
[60] 78.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-78.dyn.mit.edu
[60] 79.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-79.dyn.mit.edu
[0] 80.23.189.18.in-addr.arpa.: domain name does not exist
[60] 81.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-81.dyn.mit.edu
[0] 82.23.189.18.in-addr.arpa.: domain name does not exist
[0] 83.23.189.18.in-addr.arpa.: domain name does not exist
[60] 84.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-84.dyn.mit.edu
[0] 85.23.189.18.in-addr.arpa.: domain name does not exist
[60] 86.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-86.dyn.mit.edu
[60] 87.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-87.dyn.mit.edu
[60] 88.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-88.dyn.mit.edu
[0] 89.23.189.18.in-addr.arpa.: domain name does not exist
[0] 90.23.189.18.in-addr.arpa.: domain name does not exist
[60] 91.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-91.dyn.mit.edu
[60] 92.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-92.dyn.mit.edu
[60] 93.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-93.dyn.mit.edu
[60] 94.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-94.dyn.mit.edu
[60] 95.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-95.dyn.mit.edu
[0] 96.23.189.18.in-addr.arpa.: domain name does not exist
[0] 97.23.189.18.in-addr.arpa.: domain name does not exist
[60] 98.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-98.dyn.mit.edu
[60] 99.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-99.dyn.mit.edu
[60] 100.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-100.dyn.mit.edu
[60] 101.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-101.dyn.mit.edu
[60] 102.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-102.dyn.mit.edu
[60] 103.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-103.dyn.mit.edu
[60] 104.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-104.dyn.mit.edu
[60] 105.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-105.dyn.mit.edu
[60] 106.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-106.dyn.mit.edu
[0] 107.23.189.18.in-addr.arpa.: domain name does not exist
[60] 108.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-108.dyn.mit.edu
[0] 109.23.189.18.in-addr.arpa.: domain name does not exist
[0] 110.23.189.18.in-addr.arpa.: domain name does not exist
[0] 111.23.189.18.in-addr.arpa.: domain name does not exist
[60] 112.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-112.dyn.mit.edu
[60] 113.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-113.dyn.mit.edu
[0] 114.23.189.18.in-addr.arpa.: domain name does not exist
[60] 115.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-115.dyn.mit.edu
[0] 116.23.189.18.in-addr.arpa.: domain name does not exist
[60] 117.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-117.dyn.mit.edu
[60] 118.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-118.dyn.mit.edu
[0] 119.23.189.18.in-addr.arpa.: domain name does not exist
[60] 120.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-120.dyn.mit.edu
[0] 121.23.189.18.in-addr.arpa.: domain name does not exist
[60] 122.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-122.dyn.mit.edu
[60] 123.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-123.dyn.mit.edu
[0] 124.23.189.18.in-addr.arpa.: domain name does not exist
[60] 125.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-125.dyn.mit.edu
[60] 126.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-126.dyn.mit.edu
[0] 127.23.189.18.in-addr.arpa.: domain name does not exist
[60] 128.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-128.dyn.mit.edu
[60] 129.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-129.dyn.mit.edu
[60] 130.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-130.dyn.mit.edu
[60] 131.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-131.dyn.mit.edu
[60] 132.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-132.dyn.mit.edu
[0] 133.23.189.18.in-addr.arpa.: domain name does not exist
[60] 134.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-134.dyn.mit.edu
[60] 135.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-135.dyn.mit.edu
[0] 136.23.189.18.in-addr.arpa.: domain name does not exist
[60] 137.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-137.dyn.mit.edu
[0] 138.23.189.18.in-addr.arpa.: domain name does not exist
[60] 139.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-139.dyn.mit.edu
[60] 140.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-140.dyn.mit.edu
[60] 141.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-141.dyn.mit.edu
[0] 142.23.189.18.in-addr.arpa.: domain name does not exist
[0] 143.23.189.18.in-addr.arpa.: domain name does not exist
[60] 144.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-144.dyn.mit.edu
[60] 145.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-145.dyn.mit.edu
[60] 146.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-146.dyn.mit.edu
[60] 147.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-147.dyn.mit.edu
[0] 148.23.189.18.in-addr.arpa.: domain name does not exist
[0] 149.23.189.18.in-addr.arpa.: domain name does not exist
[60] 150.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-150.dyn.mit.edu
[60] 151.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-151.dyn.mit.edu
[60] 152.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-152.dyn.mit.edu
[60] 153.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-153.dyn.mit.edu
[0] 154.23.189.18.in-addr.arpa.: domain name does not exist
[0] 155.23.189.18.in-addr.arpa.: domain name does not exist
[60] 156.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-156.dyn.mit.edu
[0] 157.23.189.18.in-addr.arpa.: domain name does not exist
[60] 158.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-158.dyn.mit.edu
[60] 159.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-159.dyn.mit.edu
[0] 160.23.189.18.in-addr.arpa.: domain name does not exist
[0] 161.23.189.18.in-addr.arpa.: domain name does not exist
[0] 162.23.189.18.in-addr.arpa.: domain name does not exist
[60] 163.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-163.dyn.mit.edu
[60] 164.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-164.dyn.mit.edu
[0] 165.23.189.18.in-addr.arpa.: domain name does not exist
[60] 166.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-166.dyn.mit.edu
[60] 167.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-167.dyn.mit.edu
[0] 168.23.189.18.in-addr.arpa.: domain name does not exist
[0] 169.23.189.18.in-addr.arpa.: domain name does not exist
[0] 170.23.189.18.in-addr.arpa.: domain name does not exist
[60] 171.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-171.dyn.mit.edu
[0] 172.23.189.18.in-addr.arpa.: domain name does not exist
[0] 173.23.189.18.in-addr.arpa.: domain name does not exist
[0] 174.23.189.18.in-addr.arpa.: domain name does not exist
[60] 175.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-175.dyn.mit.edu
[0] 176.23.189.18.in-addr.arpa.: domain name does not exist
[60] 177.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-177.dyn.mit.edu
[0] 178.23.189.18.in-addr.arpa.: domain name does not exist
[0] 179.23.189.18.in-addr.arpa.: domain name does not exist
[0] 180.23.189.18.in-addr.arpa.: domain name does not exist
[60] 181.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-181.dyn.mit.edu
[60] 182.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-182.dyn.mit.edu
[60] 183.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-183.dyn.mit.edu
[0] 184.23.189.18.in-addr.arpa.: domain name does not exist
[60] 185.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-185.dyn.mit.edu
[60] 186.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-186.dyn.mit.edu
[60] 187.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-187.dyn.mit.edu
[0] 188.23.189.18.in-addr.arpa.: domain name does not exist
[60] 189.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-189.dyn.mit.edu
[60] 190.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-190.dyn.mit.edu
[60] 191.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-191.dyn.mit.edu
[60] 192.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-192.dyn.mit.edu
[60] 193.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-193.dyn.mit.edu
[60] 194.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-194.dyn.mit.edu
[0] 195.23.189.18.in-addr.arpa.: domain name does not exist
[0] 196.23.189.18.in-addr.arpa.: domain name does not exist
[60] 197.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-197.dyn.mit.edu
[0] 198.23.189.18.in-addr.arpa.: domain name does not exist
[0] 199.23.189.18.in-addr.arpa.: domain name does not exist
[60] 200.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-200.dyn.mit.edu
[60] 201.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-201.dyn.mit.edu
[60] 202.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-202.dyn.mit.edu
[60] 203.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-203.dyn.mit.edu
[0] 204.23.189.18.in-addr.arpa.: domain name does not exist
[0] 205.23.189.18.in-addr.arpa.: domain name does not exist
[60] 206.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-206.dyn.mit.edu
[60] 207.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-207.dyn.mit.edu
[0] 208.23.189.18.in-addr.arpa.: domain name does not exist
[0] 209.23.189.18.in-addr.arpa.: domain name does not exist
[60] 210.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-210.dyn.mit.edu
[60] 211.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-211.dyn.mit.edu
[0] 212.23.189.18.in-addr.arpa.: domain name does not exist
[0] 213.23.189.18.in-addr.arpa.: domain name does not exist
[0] 214.23.189.18.in-addr.arpa.: domain name does not exist
[0] 215.23.189.18.in-addr.arpa.: domain name does not exist
[60] 216.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-216.dyn.mit.edu
[0] 217.23.189.18.in-addr.arpa.: domain name does not exist
[60] 218.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-218.dyn.mit.edu
[60] 219.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-219.dyn.mit.edu
[60] 220.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-220.dyn.mit.edu
[60] 221.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-221.dyn.mit.edu
[60] 222.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-222.dyn.mit.edu
[60] 223.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-223.dyn.mit.edu
[60] 224.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-224.dyn.mit.edu
[60] 225.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-225.dyn.mit.edu
[0] 226.23.189.18.in-addr.arpa.: domain name does not exist
[60] 227.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-227.dyn.mit.edu
[60] 228.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-228.dyn.mit.edu
[60] 229.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-229.dyn.mit.edu
[60] 230.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-230.dyn.mit.edu
[0] 231.23.189.18.in-addr.arpa.: domain name does not exist
[60] 232.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-232.dyn.mit.edu
[60] 233.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-233.dyn.mit.edu
[0] 234.23.189.18.in-addr.arpa.: domain name does not exist
[60] 235.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-235.dyn.mit.edu
[60] 236.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-236.dyn.mit.edu
[60] 237.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-237.dyn.mit.edu
[0] 238.23.189.18.in-addr.arpa.: domain name does not exist
[60] 239.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-239.dyn.mit.edu
[60] 240.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-240.dyn.mit.edu
[60] 241.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-241.dyn.mit.edu
[60] 242.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-242.dyn.mit.edu
[60] 243.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-243.dyn.mit.edu
[60] 244.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-244.dyn.mit.edu
[60] 245.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-245.dyn.mit.edu
[60] 246.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-246.dyn.mit.edu
[60] 247.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-247.dyn.mit.edu
[0] 248.23.189.18.in-addr.arpa.: domain name does not exist
[60] 249.23.189.18.in-addr.arpa. domain name pointer dhcp-18-189-23-249.dyn.mit.edu
[0] 250.23.189.18.in-addr.arpa.: domain name does not exist
[0] 251.23.189.18.in-addr.arpa.: domain name does not exist
[0] 252.23.189.18.in-addr.arpa.: domain name does not exist
[0] 253.23.189.18.in-addr.arpa.: domain name does not exist
[0] 254.23.189.18.in-addr.arpa.: domain name does not exist
[0] 255.23.189.18.in-addr.arpa.: domain name does not exist