[0] 0.55.189.18.in-addr.arpa.: domain name does not exist
[0] 1.55.189.18.in-addr.arpa.: domain name does not exist
[0] 2.55.189.18.in-addr.arpa.: domain name does not exist
[0] 3.55.189.18.in-addr.arpa.: domain name does not exist
[0] 4.55.189.18.in-addr.arpa.: domain name does not exist
[0] 5.55.189.18.in-addr.arpa.: domain name does not exist
[60] 6.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-6.dyn.MIT.EDU
[60] 7.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-7.dyn.MIT.EDU
[60] 8.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-8.dyn.MIT.EDU
[60] 9.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-9.dyn.MIT.EDU
[0] 10.55.189.18.in-addr.arpa.: domain name does not exist
[0] 11.55.189.18.in-addr.arpa.: domain name does not exist
[0] 12.55.189.18.in-addr.arpa.: domain name does not exist
[0] 13.55.189.18.in-addr.arpa.: domain name does not exist
[60] 14.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-14.dyn.MIT.EDU
[60] 15.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-15.dyn.MIT.EDU
[60] 16.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-16.dyn.MIT.EDU
[60] 17.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-17.dyn.MIT.EDU
[0] 18.55.189.18.in-addr.arpa.: domain name does not exist
[60] 19.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-19.dyn.MIT.EDU
[60] 20.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-20.dyn.MIT.EDU
[60] 21.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-21.dyn.MIT.EDU
[0] 22.55.189.18.in-addr.arpa.: domain name does not exist
[0] 23.55.189.18.in-addr.arpa.: domain name does not exist
[60] 24.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-24.dyn.MIT.EDU
[0] 25.55.189.18.in-addr.arpa.: domain name does not exist
[60] 26.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-26.dyn.MIT.EDU
[0] 27.55.189.18.in-addr.arpa.: domain name does not exist
[0] 28.55.189.18.in-addr.arpa.: domain name does not exist
[60] 29.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-29.dyn.MIT.EDU
[0] 30.55.189.18.in-addr.arpa.: domain name does not exist
[60] 31.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-31.dyn.MIT.EDU
[0] 32.55.189.18.in-addr.arpa.: domain name does not exist
[60] 33.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-33.dyn.MIT.EDU
[60] 34.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-34.dyn.MIT.EDU
[0] 35.55.189.18.in-addr.arpa.: domain name does not exist
[60] 36.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-36.dyn.MIT.EDU
[0] 37.55.189.18.in-addr.arpa.: domain name does not exist
[60] 38.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-38.dyn.MIT.EDU
[60] 39.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-39.dyn.MIT.EDU
[0] 40.55.189.18.in-addr.arpa.: domain name does not exist
[0] 41.55.189.18.in-addr.arpa.: domain name does not exist
[60] 42.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-42.dyn.MIT.EDU
[0] 43.55.189.18.in-addr.arpa.: domain name does not exist
[0] 44.55.189.18.in-addr.arpa.: domain name does not exist
[60] 45.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-45.dyn.MIT.EDU
[0] 46.55.189.18.in-addr.arpa.: domain name does not exist
[0] 47.55.189.18.in-addr.arpa.: domain name does not exist
[0] 48.55.189.18.in-addr.arpa.: domain name does not exist
[60] 49.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-49.dyn.MIT.EDU
[0] 50.55.189.18.in-addr.arpa.: domain name does not exist
[0] 51.55.189.18.in-addr.arpa.: domain name does not exist
[60] 52.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-52.dyn.MIT.EDU
[60] 53.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-53.dyn.MIT.EDU
[60] 54.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-54.dyn.MIT.EDU
[0] 55.55.189.18.in-addr.arpa.: domain name does not exist
[60] 56.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-56.dyn.MIT.EDU
[60] 57.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-57.dyn.MIT.EDU
[60] 58.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-58.dyn.MIT.EDU
[60] 59.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-59.dyn.MIT.EDU
[0] 60.55.189.18.in-addr.arpa.: domain name does not exist
[0] 61.55.189.18.in-addr.arpa.: domain name does not exist
[0] 62.55.189.18.in-addr.arpa.: domain name does not exist
[0] 63.55.189.18.in-addr.arpa.: domain name does not exist
[0] 64.55.189.18.in-addr.arpa.: domain name does not exist
[0] 65.55.189.18.in-addr.arpa.: domain name does not exist
[60] 66.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-66.dyn.MIT.EDU
[60] 67.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-67.dyn.MIT.EDU
[60] 68.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-68.dyn.MIT.EDU
[0] 69.55.189.18.in-addr.arpa.: domain name does not exist
[0] 70.55.189.18.in-addr.arpa.: domain name does not exist
[0] 71.55.189.18.in-addr.arpa.: domain name does not exist
[0] 72.55.189.18.in-addr.arpa.: domain name does not exist
[0] 73.55.189.18.in-addr.arpa.: domain name does not exist
[0] 74.55.189.18.in-addr.arpa.: domain name does not exist
[60] 75.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-75.dyn.MIT.EDU
[0] 76.55.189.18.in-addr.arpa.: domain name does not exist
[60] 77.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-77.dyn.MIT.EDU
[0] 78.55.189.18.in-addr.arpa.: domain name does not exist
[60] 79.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-79.dyn.MIT.EDU
[0] 80.55.189.18.in-addr.arpa.: domain name does not exist
[60] 81.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-81.dyn.MIT.EDU
[60] 82.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-82.dyn.MIT.EDU
[0] 83.55.189.18.in-addr.arpa.: domain name does not exist
[0] 84.55.189.18.in-addr.arpa.: domain name does not exist
[0] 85.55.189.18.in-addr.arpa.: domain name does not exist
[60] 86.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-86.dyn.MIT.EDU
[60] 87.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-87.dyn.MIT.EDU
[0] 88.55.189.18.in-addr.arpa.: domain name does not exist
[60] 89.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-89.dyn.MIT.EDU
[0] 90.55.189.18.in-addr.arpa.: domain name does not exist
[60] 91.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-91.dyn.MIT.EDU
[60] 92.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-92.dyn.MIT.EDU
[60] 93.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-93.dyn.MIT.EDU
[0] 94.55.189.18.in-addr.arpa.: domain name does not exist
[60] 95.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-95.dyn.MIT.EDU
[60] 96.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-96.dyn.MIT.EDU
[0] 97.55.189.18.in-addr.arpa.: domain name does not exist
[60] 98.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-98.dyn.MIT.EDU
[0] 99.55.189.18.in-addr.arpa.: domain name does not exist
[0] 100.55.189.18.in-addr.arpa.: domain name does not exist
[0] 101.55.189.18.in-addr.arpa.: domain name does not exist
[60] 102.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-102.dyn.MIT.EDU
[60] 103.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-103.dyn.MIT.EDU
[60] 104.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-104.dyn.MIT.EDU
[60] 105.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-105.dyn.MIT.EDU
[0] 106.55.189.18.in-addr.arpa.: domain name does not exist
[0] 107.55.189.18.in-addr.arpa.: domain name does not exist
[60] 108.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-108.dyn.MIT.EDU
[0] 109.55.189.18.in-addr.arpa.: domain name does not exist
[0] 110.55.189.18.in-addr.arpa.: domain name does not exist
[0] 111.55.189.18.in-addr.arpa.: domain name does not exist
[60] 112.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-112.dyn.MIT.EDU
[0] 113.55.189.18.in-addr.arpa.: domain name does not exist
[0] 114.55.189.18.in-addr.arpa.: domain name does not exist
[60] 115.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-115.dyn.MIT.EDU
[0] 116.55.189.18.in-addr.arpa.: domain name does not exist
[60] 117.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-117.dyn.MIT.EDU
[0] 118.55.189.18.in-addr.arpa.: domain name does not exist
[0] 119.55.189.18.in-addr.arpa.: domain name does not exist
[0] 120.55.189.18.in-addr.arpa.: domain name does not exist
[60] 121.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-121.dyn.MIT.EDU
[0] 122.55.189.18.in-addr.arpa.: domain name does not exist
[60] 123.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-123.dyn.MIT.EDU
[0] 124.55.189.18.in-addr.arpa.: domain name does not exist
[60] 125.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-125.dyn.MIT.EDU
[0] 126.55.189.18.in-addr.arpa.: domain name does not exist
[0] 127.55.189.18.in-addr.arpa.: domain name does not exist
[60] 128.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-128.dyn.MIT.EDU
[60] 129.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-129.dyn.MIT.EDU
[60] 130.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-130.dyn.MIT.EDU
[60] 131.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-131.dyn.MIT.EDU
[0] 132.55.189.18.in-addr.arpa.: domain name does not exist
[0] 133.55.189.18.in-addr.arpa.: domain name does not exist
[60] 134.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-134.dyn.MIT.EDU
[0] 135.55.189.18.in-addr.arpa.: domain name does not exist
[0] 136.55.189.18.in-addr.arpa.: domain name does not exist
[60] 137.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-137.dyn.MIT.EDU
[60] 138.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-138.dyn.MIT.EDU
[60] 139.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-139.dyn.MIT.EDU
[0] 140.55.189.18.in-addr.arpa.: domain name does not exist
[0] 141.55.189.18.in-addr.arpa.: domain name does not exist
[0] 142.55.189.18.in-addr.arpa.: domain name does not exist
[0] 143.55.189.18.in-addr.arpa.: domain name does not exist
[60] 144.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-144.dyn.MIT.EDU
[0] 145.55.189.18.in-addr.arpa.: domain name does not exist
[0] 146.55.189.18.in-addr.arpa.: domain name does not exist
[0] 147.55.189.18.in-addr.arpa.: domain name does not exist
[60] 148.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-148.dyn.MIT.EDU
[60] 149.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-149.dyn.MIT.EDU
[0] 150.55.189.18.in-addr.arpa.: domain name does not exist
[60] 151.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-151.dyn.MIT.EDU
[0] 152.55.189.18.in-addr.arpa.: domain name does not exist
[0] 153.55.189.18.in-addr.arpa.: domain name does not exist
[0] 154.55.189.18.in-addr.arpa.: domain name does not exist
[60] 155.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-155.dyn.MIT.EDU
[0] 156.55.189.18.in-addr.arpa.: domain name does not exist
[0] 157.55.189.18.in-addr.arpa.: domain name does not exist
[60] 158.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-158.dyn.MIT.EDU
[60] 159.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-159.dyn.MIT.EDU
[60] 160.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-160.dyn.MIT.EDU
[60] 161.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-161.dyn.MIT.EDU
[0] 162.55.189.18.in-addr.arpa.: domain name does not exist
[60] 163.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-163.dyn.MIT.EDU
[60] 164.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-164.dyn.MIT.EDU
[0] 165.55.189.18.in-addr.arpa.: domain name does not exist
[0] 166.55.189.18.in-addr.arpa.: domain name does not exist
[60] 167.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-167.dyn.MIT.EDU
[0] 168.55.189.18.in-addr.arpa.: domain name does not exist
[0] 169.55.189.18.in-addr.arpa.: domain name does not exist
[0] 170.55.189.18.in-addr.arpa.: domain name does not exist
[60] 171.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-171.dyn.MIT.EDU
[60] 172.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-172.dyn.MIT.EDU
[0] 173.55.189.18.in-addr.arpa.: domain name does not exist
[60] 174.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-174.dyn.MIT.EDU
[60] 175.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-175.dyn.MIT.EDU
[60] 176.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-176.dyn.MIT.EDU
[60] 177.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-177.dyn.MIT.EDU
[60] 178.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-178.dyn.MIT.EDU
[0] 179.55.189.18.in-addr.arpa.: domain name does not exist
[0] 180.55.189.18.in-addr.arpa.: domain name does not exist
[0] 181.55.189.18.in-addr.arpa.: domain name does not exist
[0] 182.55.189.18.in-addr.arpa.: domain name does not exist
[0] 183.55.189.18.in-addr.arpa.: domain name does not exist
[0] 184.55.189.18.in-addr.arpa.: domain name does not exist
[60] 185.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-185.dyn.MIT.EDU
[60] 186.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-186.dyn.MIT.EDU
[0] 187.55.189.18.in-addr.arpa.: domain name does not exist
[60] 188.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-188.dyn.MIT.EDU
[0] 189.55.189.18.in-addr.arpa.: domain name does not exist
[0] 190.55.189.18.in-addr.arpa.: domain name does not exist
[60] 191.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-191.dyn.MIT.EDU
[60] 192.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-192.dyn.MIT.EDU
[0] 193.55.189.18.in-addr.arpa.: domain name does not exist
[0] 194.55.189.18.in-addr.arpa.: domain name does not exist
[60] 195.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-195.dyn.MIT.EDU
[0] 196.55.189.18.in-addr.arpa.: domain name does not exist
[60] 197.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-197.dyn.MIT.EDU
[60] 198.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-198.dyn.MIT.EDU
[60] 199.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-199.dyn.MIT.EDU
[60] 200.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-200.dyn.MIT.EDU
[60] 201.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-201.dyn.MIT.EDU
[0] 202.55.189.18.in-addr.arpa.: domain name does not exist
[60] 203.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-203.dyn.MIT.EDU
[60] 204.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-204.dyn.MIT.EDU
[60] 205.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-205.dyn.MIT.EDU
[60] 206.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-206.dyn.MIT.EDU
[0] 207.55.189.18.in-addr.arpa.: domain name does not exist
[60] 208.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-208.dyn.MIT.EDU
[60] 209.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-209.dyn.MIT.EDU
[0] 210.55.189.18.in-addr.arpa.: domain name does not exist
[60] 211.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-211.dyn.MIT.EDU
[60] 212.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-212.dyn.MIT.EDU
[0] 213.55.189.18.in-addr.arpa.: domain name does not exist
[60] 214.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-214.dyn.MIT.EDU
[60] 215.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-215.dyn.MIT.EDU
[60] 216.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-216.dyn.MIT.EDU
[0] 217.55.189.18.in-addr.arpa.: domain name does not exist
[60] 218.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-218.dyn.MIT.EDU
[60] 219.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-219.dyn.MIT.EDU
[60] 220.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-220.dyn.MIT.EDU
[0] 221.55.189.18.in-addr.arpa.: domain name does not exist
[0] 222.55.189.18.in-addr.arpa.: domain name does not exist
[60] 223.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-223.dyn.MIT.EDU
[0] 224.55.189.18.in-addr.arpa.: domain name does not exist
[0] 225.55.189.18.in-addr.arpa.: domain name does not exist
[0] 226.55.189.18.in-addr.arpa.: domain name does not exist
[60] 227.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-227.dyn.MIT.EDU
[0] 228.55.189.18.in-addr.arpa.: domain name does not exist
[60] 229.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-229.dyn.MIT.EDU
[60] 230.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-230.dyn.MIT.EDU
[0] 231.55.189.18.in-addr.arpa.: domain name does not exist
[60] 232.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-232.dyn.MIT.EDU
[0] 233.55.189.18.in-addr.arpa.: domain name does not exist
[60] 234.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-234.dyn.MIT.EDU
[0] 235.55.189.18.in-addr.arpa.: domain name does not exist
[0] 236.55.189.18.in-addr.arpa.: domain name does not exist
[60] 237.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-237.dyn.MIT.EDU
[0] 238.55.189.18.in-addr.arpa.: domain name does not exist
[60] 239.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-239.dyn.MIT.EDU
[60] 240.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-240.dyn.MIT.EDU
[0] 241.55.189.18.in-addr.arpa.: domain name does not exist
[0] 242.55.189.18.in-addr.arpa.: domain name does not exist
[60] 243.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-243.dyn.MIT.EDU
[0] 244.55.189.18.in-addr.arpa.: domain name does not exist
[60] 245.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-245.dyn.MIT.EDU
[0] 246.55.189.18.in-addr.arpa.: domain name does not exist
[60] 247.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-247.dyn.MIT.EDU
[60] 248.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-248.dyn.MIT.EDU
[60] 249.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-249.dyn.MIT.EDU
[60] 250.55.189.18.in-addr.arpa. domain name pointer dhcp-18-189-55-250.dyn.MIT.EDU
[0] 251.55.189.18.in-addr.arpa.: domain name does not exist
[0] 252.55.189.18.in-addr.arpa.: domain name does not exist
[0] 253.55.189.18.in-addr.arpa.: domain name does not exist
[0] 254.55.189.18.in-addr.arpa.: domain name does not exist
[0] 255.55.189.18.in-addr.arpa.: domain name does not exist