[0] 0.63.189.18.in-addr.arpa.: domain name does not exist
[0] 1.63.189.18.in-addr.arpa.: domain name does not exist
[0] 2.63.189.18.in-addr.arpa.: domain name does not exist
[0] 3.63.189.18.in-addr.arpa.: domain name does not exist
[0] 4.63.189.18.in-addr.arpa.: domain name does not exist
[60] 5.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-5.dyn.mit.edu
[0] 6.63.189.18.in-addr.arpa.: domain name does not exist
[60] 7.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-7.dyn.mit.edu
[0] 8.63.189.18.in-addr.arpa.: domain name does not exist
[0] 9.63.189.18.in-addr.arpa.: domain name does not exist
[60] 10.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-10.dyn.mit.edu
[60] 11.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-11.dyn.mit.edu
[60] 12.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-12.dyn.mit.edu
[0] 13.63.189.18.in-addr.arpa.: domain name does not exist
[0] 14.63.189.18.in-addr.arpa.: domain name does not exist
[60] 15.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-15.dyn.mit.edu
[0] 16.63.189.18.in-addr.arpa.: domain name does not exist
[0] 17.63.189.18.in-addr.arpa.: domain name does not exist
[60] 18.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-18.dyn.mit.edu
[60] 19.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-19.dyn.mit.edu
[0] 20.63.189.18.in-addr.arpa.: domain name does not exist
[60] 21.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-21.dyn.mit.edu
[0] 22.63.189.18.in-addr.arpa.: domain name does not exist
[0] 23.63.189.18.in-addr.arpa.: domain name does not exist
[0] 24.63.189.18.in-addr.arpa.: domain name does not exist
[0] 25.63.189.18.in-addr.arpa.: domain name does not exist
[0] 26.63.189.18.in-addr.arpa.: domain name does not exist
[0] 27.63.189.18.in-addr.arpa.: domain name does not exist
[0] 28.63.189.18.in-addr.arpa.: domain name does not exist
[0] 29.63.189.18.in-addr.arpa.: domain name does not exist
[60] 30.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-30.dyn.mit.edu
[0] 31.63.189.18.in-addr.arpa.: domain name does not exist
[60] 32.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-32.dyn.mit.edu
[0] 33.63.189.18.in-addr.arpa.: domain name does not exist
[0] 34.63.189.18.in-addr.arpa.: domain name does not exist
[0] 35.63.189.18.in-addr.arpa.: domain name does not exist
[0] 36.63.189.18.in-addr.arpa.: domain name does not exist
[60] 37.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-37.dyn.mit.edu
[60] 38.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-38.dyn.mit.edu
[0] 39.63.189.18.in-addr.arpa.: domain name does not exist
[0] 40.63.189.18.in-addr.arpa.: domain name does not exist
[0] 41.63.189.18.in-addr.arpa.: domain name does not exist
[60] 42.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-42.dyn.mit.edu
[60] 43.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-43.dyn.mit.edu
[60] 44.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-44.dyn.mit.edu
[60] 45.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-45.dyn.mit.edu
[0] 46.63.189.18.in-addr.arpa.: domain name does not exist
[0] 47.63.189.18.in-addr.arpa.: domain name does not exist
[60] 48.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-48.dyn.mit.edu
[0] 49.63.189.18.in-addr.arpa.: domain name does not exist
[60] 50.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-50.dyn.mit.edu
[60] 51.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-51.dyn.mit.edu
[0] 52.63.189.18.in-addr.arpa.: domain name does not exist
[60] 53.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-53.dyn.mit.edu
[60] 54.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-54.dyn.mit.edu
[60] 55.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-55.dyn.mit.edu
[60] 56.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-56.dyn.mit.edu
[60] 57.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-57.dyn.mit.edu
[60] 58.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-58.dyn.mit.edu
[60] 59.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-59.dyn.mit.edu
[60] 60.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-60.dyn.mit.edu
[60] 61.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-61.dyn.mit.edu
[0] 62.63.189.18.in-addr.arpa.: domain name does not exist
[0] 63.63.189.18.in-addr.arpa.: domain name does not exist
[60] 64.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-64.dyn.MIT.EDU
[60] 65.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-65.dyn.MIT.EDU
[60] 66.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-66.dyn.MIT.EDU
[0] 67.63.189.18.in-addr.arpa.: domain name does not exist
[0] 68.63.189.18.in-addr.arpa.: domain name does not exist
[60] 69.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-69.dyn.MIT.EDU
[60] 70.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-70.dyn.MIT.EDU
[0] 71.63.189.18.in-addr.arpa.: domain name does not exist
[0] 72.63.189.18.in-addr.arpa.: domain name does not exist
[60] 73.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-73.dyn.MIT.EDU
[60] 74.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-74.dyn.MIT.EDU
[0] 75.63.189.18.in-addr.arpa.: domain name does not exist
[60] 76.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-76.dyn.MIT.EDU
[0] 77.63.189.18.in-addr.arpa.: domain name does not exist
[60] 78.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-78.dyn.MIT.EDU
[0] 79.63.189.18.in-addr.arpa.: domain name does not exist
[0] 80.63.189.18.in-addr.arpa.: domain name does not exist
[60] 81.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-81.dyn.MIT.EDU
[0] 82.63.189.18.in-addr.arpa.: domain name does not exist
[0] 83.63.189.18.in-addr.arpa.: domain name does not exist
[60] 84.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-84.dyn.MIT.EDU
[60] 85.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-85.dyn.MIT.EDU
[60] 86.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-86.dyn.MIT.EDU
[0] 87.63.189.18.in-addr.arpa.: domain name does not exist
[60] 88.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-88.dyn.MIT.EDU
[0] 89.63.189.18.in-addr.arpa.: domain name does not exist
[60] 90.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-90.dyn.MIT.EDU
[0] 91.63.189.18.in-addr.arpa.: domain name does not exist
[60] 92.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-92.dyn.MIT.EDU
[0] 93.63.189.18.in-addr.arpa.: domain name does not exist
[60] 94.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-94.dyn.MIT.EDU
[0] 95.63.189.18.in-addr.arpa.: domain name does not exist
[60] 96.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-96.dyn.MIT.EDU
[0] 97.63.189.18.in-addr.arpa.: domain name does not exist
[60] 98.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-98.dyn.MIT.EDU
[0] 99.63.189.18.in-addr.arpa.: domain name does not exist
[0] 100.63.189.18.in-addr.arpa.: domain name does not exist
[60] 101.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-101.dyn.MIT.EDU
[60] 102.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-102.dyn.MIT.EDU
[0] 103.63.189.18.in-addr.arpa.: domain name does not exist
[60] 104.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-104.dyn.mit.edu
[60] 105.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-105.dyn.mit.edu
[60] 106.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-106.dyn.mit.edu
[60] 107.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-107.dyn.mit.edu
[0] 108.63.189.18.in-addr.arpa.: domain name does not exist
[0] 109.63.189.18.in-addr.arpa.: domain name does not exist
[60] 110.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-110.dyn.mit.edu
[60] 111.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-111.dyn.mit.edu
[0] 112.63.189.18.in-addr.arpa.: domain name does not exist
[60] 113.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-113.dyn.mit.edu
[60] 114.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-114.dyn.mit.edu
[60] 115.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-115.dyn.mit.edu
[60] 116.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-116.dyn.mit.edu
[0] 117.63.189.18.in-addr.arpa.: domain name does not exist
[60] 118.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-118.dyn.mit.edu
[0] 119.63.189.18.in-addr.arpa.: domain name does not exist
[60] 120.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-120.dyn.mit.edu
[60] 121.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-121.dyn.mit.edu
[0] 122.63.189.18.in-addr.arpa.: domain name does not exist
[60] 123.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-123.dyn.mit.edu
[60] 124.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-124.dyn.mit.edu
[0] 125.63.189.18.in-addr.arpa.: domain name does not exist
[60] 126.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-126.dyn.mit.edu
[60] 127.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-127.dyn.mit.edu
[60] 128.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-128.dyn.mit.edu
[60] 129.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-129.dyn.mit.edu
[0] 130.63.189.18.in-addr.arpa.: domain name does not exist
[0] 131.63.189.18.in-addr.arpa.: domain name does not exist
[0] 132.63.189.18.in-addr.arpa.: domain name does not exist
[60] 133.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-133.dyn.mit.edu
[0] 134.63.189.18.in-addr.arpa.: domain name does not exist
[0] 135.63.189.18.in-addr.arpa.: domain name does not exist
[60] 136.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-136.dyn.mit.edu
[0] 137.63.189.18.in-addr.arpa.: domain name does not exist
[60] 138.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-138.dyn.mit.edu
[60] 139.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-139.dyn.mit.edu
[0] 140.63.189.18.in-addr.arpa.: domain name does not exist
[60] 141.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-141.dyn.mit.edu
[0] 142.63.189.18.in-addr.arpa.: domain name does not exist
[60] 143.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-143.dyn.mit.edu
[60] 144.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-144.dyn.mit.edu
[0] 145.63.189.18.in-addr.arpa.: domain name does not exist
[0] 146.63.189.18.in-addr.arpa.: domain name does not exist
[60] 147.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-147.dyn.mit.edu
[60] 148.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-148.dyn.mit.edu
[0] 149.63.189.18.in-addr.arpa.: domain name does not exist
[0] 150.63.189.18.in-addr.arpa.: domain name does not exist
[60] 151.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-151.dyn.mit.edu
[0] 152.63.189.18.in-addr.arpa.: domain name does not exist
[60] 153.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-153.dyn.mit.edu
[60] 154.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-154.dyn.mit.edu
[60] 155.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-155.dyn.mit.edu
[60] 156.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-156.dyn.mit.edu
[0] 157.63.189.18.in-addr.arpa.: domain name does not exist
[60] 158.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-158.dyn.mit.edu
[60] 159.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-159.dyn.mit.edu
[60] 160.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-160.dyn.mit.edu
[0] 161.63.189.18.in-addr.arpa.: domain name does not exist
[60] 162.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-162.dyn.mit.edu
[60] 163.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-163.dyn.mit.edu
[0] 164.63.189.18.in-addr.arpa.: domain name does not exist
[0] 165.63.189.18.in-addr.arpa.: domain name does not exist
[0] 166.63.189.18.in-addr.arpa.: domain name does not exist
[0] 167.63.189.18.in-addr.arpa.: domain name does not exist
[60] 168.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-168.dyn.mit.edu
[60] 169.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-169.dyn.mit.edu
[0] 170.63.189.18.in-addr.arpa.: domain name does not exist
[60] 171.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-171.dyn.mit.edu
[0] 172.63.189.18.in-addr.arpa.: domain name does not exist
[0] 173.63.189.18.in-addr.arpa.: domain name does not exist
[60] 174.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-174.dyn.mit.edu
[60] 175.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-175.dyn.mit.edu
[0] 176.63.189.18.in-addr.arpa.: domain name does not exist
[0] 177.63.189.18.in-addr.arpa.: domain name does not exist
[0] 178.63.189.18.in-addr.arpa.: domain name does not exist
[0] 179.63.189.18.in-addr.arpa.: domain name does not exist
[0] 180.63.189.18.in-addr.arpa.: domain name does not exist
[0] 181.63.189.18.in-addr.arpa.: domain name does not exist
[60] 182.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-182.dyn.mit.edu
[60] 183.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-183.dyn.mit.edu
[0] 184.63.189.18.in-addr.arpa.: domain name does not exist
[60] 185.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-185.dyn.mit.edu
[0] 186.63.189.18.in-addr.arpa.: domain name does not exist
[0] 187.63.189.18.in-addr.arpa.: domain name does not exist
[60] 188.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-188.dyn.mit.edu
[60] 189.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-189.dyn.mit.edu
[60] 190.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-190.dyn.mit.edu
[60] 191.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-191.dyn.mit.edu
[0] 192.63.189.18.in-addr.arpa.: domain name does not exist
[60] 193.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-193.dyn.mit.edu
[0] 194.63.189.18.in-addr.arpa.: domain name does not exist
[0] 195.63.189.18.in-addr.arpa.: domain name does not exist
[0] 196.63.189.18.in-addr.arpa.: domain name does not exist
[60] 197.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-197.dyn.mit.edu
[60] 198.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-198.dyn.mit.edu
[0] 199.63.189.18.in-addr.arpa.: domain name does not exist
[0] 200.63.189.18.in-addr.arpa.: domain name does not exist
[60] 201.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-201.dyn.mit.edu
[0] 202.63.189.18.in-addr.arpa.: domain name does not exist
[60] 203.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-203.dyn.mit.edu
[60] 204.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-204.dyn.mit.edu
[60] 205.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-205.dyn.mit.edu
[0] 206.63.189.18.in-addr.arpa.: domain name does not exist
[60] 207.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-207.dyn.mit.edu
[60] 208.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-208.dyn.mit.edu
[60] 209.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-209.dyn.mit.edu
[60] 210.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-210.dyn.mit.edu
[60] 211.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-211.dyn.mit.edu
[0] 212.63.189.18.in-addr.arpa.: domain name does not exist
[0] 213.63.189.18.in-addr.arpa.: domain name does not exist
[0] 214.63.189.18.in-addr.arpa.: domain name does not exist
[0] 215.63.189.18.in-addr.arpa.: domain name does not exist
[0] 216.63.189.18.in-addr.arpa.: domain name does not exist
[0] 217.63.189.18.in-addr.arpa.: domain name does not exist
[60] 218.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-218.dyn.mit.edu
[0] 219.63.189.18.in-addr.arpa.: domain name does not exist
[60] 220.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-220.dyn.mit.edu
[60] 221.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-221.dyn.mit.edu
[0] 222.63.189.18.in-addr.arpa.: domain name does not exist
[60] 223.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-223.dyn.mit.edu
[0] 224.63.189.18.in-addr.arpa.: domain name does not exist
[60] 225.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-225.dyn.mit.edu
[60] 226.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-226.dyn.mit.edu
[60] 227.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-227.dyn.mit.edu
[0] 228.63.189.18.in-addr.arpa.: domain name does not exist
[60] 229.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-229.dyn.mit.edu
[60] 230.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-230.dyn.mit.edu
[60] 231.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-231.dyn.mit.edu
[60] 232.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-232.dyn.mit.edu
[60] 233.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-233.dyn.mit.edu
[60] 234.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-234.dyn.mit.edu
[60] 235.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-235.dyn.mit.edu
[0] 236.63.189.18.in-addr.arpa.: domain name does not exist
[0] 237.63.189.18.in-addr.arpa.: domain name does not exist
[0] 238.63.189.18.in-addr.arpa.: domain name does not exist
[60] 239.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-239.dyn.mit.edu
[60] 240.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-240.dyn.mit.edu
[60] 241.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-241.dyn.mit.edu
[60] 242.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-242.dyn.mit.edu
[0] 243.63.189.18.in-addr.arpa.: domain name does not exist
[60] 244.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-244.dyn.mit.edu
[60] 245.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-245.dyn.mit.edu
[60] 246.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-246.dyn.mit.edu
[60] 247.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-247.dyn.mit.edu
[0] 248.63.189.18.in-addr.arpa.: domain name does not exist
[0] 249.63.189.18.in-addr.arpa.: domain name does not exist
[60] 250.63.189.18.in-addr.arpa. domain name pointer dhcp-18-189-63-250.dyn.mit.edu
[0] 251.63.189.18.in-addr.arpa.: domain name does not exist
[0] 252.63.189.18.in-addr.arpa.: domain name does not exist
[0] 253.63.189.18.in-addr.arpa.: domain name does not exist
[0] 254.63.189.18.in-addr.arpa.: domain name does not exist
[0] 255.63.189.18.in-addr.arpa.: domain name does not exist