[0] 0.174.151.202.in-addr.arpa.: domain name does not exist
[86400] 1.174.151.202.in-addr.arpa. domain name pointer vpop.hcmc.netnam.vn
[86400] 2.174.151.202.in-addr.arpa. domain name pointer ci174-2.netnam.vn
[86400] 3.174.151.202.in-addr.arpa. domain name pointer ci174-3.netnam.vn
[86400] 4.174.151.202.in-addr.arpa. domain name pointer ci174-4.netnam.vn
[86400] 5.174.151.202.in-addr.arpa. domain name pointer ci174-5.netnam.vn
[86400] 6.174.151.202.in-addr.arpa. domain name pointer ci174-6.netnam.vn
[86400] 7.174.151.202.in-addr.arpa. domain name pointer ci174-7.netnam.vn
[86400] 8.174.151.202.in-addr.arpa. domain name pointer ci174-8.netnam.vn
[86400] 9.174.151.202.in-addr.arpa. domain name pointer ci174-9.netnam.vn
[86400] 10.174.151.202.in-addr.arpa. domain name pointer ci174-10.netnam.vn
[86400] 11.174.151.202.in-addr.arpa. domain name pointer ci174-11.netnam.vn
[86400] 12.174.151.202.in-addr.arpa. domain name pointer ci174-12.netnam.vn
[86400] 13.174.151.202.in-addr.arpa. domain name pointer ci174-13.netnam.vn
[86400] 14.174.151.202.in-addr.arpa. domain name pointer ci174-14.netnam.vn
[86400] 15.174.151.202.in-addr.arpa. domain name pointer ci174-15.netnam.vn
[86400] 16.174.151.202.in-addr.arpa. domain name pointer ci174-16.netnam.vn
[86400] 17.174.151.202.in-addr.arpa. domain name pointer ci174-17.netnam.vn
[86400] 18.174.151.202.in-addr.arpa. domain name pointer ci174-18.netnam.vn
[86400] 19.174.151.202.in-addr.arpa. domain name pointer ci174-19.netnam.vn
[86400] 20.174.151.202.in-addr.arpa. domain name pointer ci174-20.netnam.vn
[86400] 21.174.151.202.in-addr.arpa. domain name pointer ci174-21.netnam.vn
[86400] 22.174.151.202.in-addr.arpa. domain name pointer ci174-22.netnam.vn
[86400] 23.174.151.202.in-addr.arpa. domain name pointer ci174-23.netnam.vn
[86400] 24.174.151.202.in-addr.arpa. domain name pointer ci174-24.netnam.vn
[86400] 25.174.151.202.in-addr.arpa. domain name pointer ci174-25.netnam.vn
[86400] 26.174.151.202.in-addr.arpa. domain name pointer ci174-26.netnam.vn
[86400] 27.174.151.202.in-addr.arpa. domain name pointer ci174-27.netnam.vn
[86400] 28.174.151.202.in-addr.arpa. domain name pointer ci174-28.netnam.vn
[86400] 29.174.151.202.in-addr.arpa. domain name pointer ci174-29.netnam.vn
[86400] 30.174.151.202.in-addr.arpa. domain name pointer ci174-30.netnam.vn
[86400] 31.174.151.202.in-addr.arpa. domain name pointer ci174-31.netnam.vn
[86400] 32.174.151.202.in-addr.arpa. domain name pointer ci174-32.netnam.vn
[86400] 33.174.151.202.in-addr.arpa. domain name pointer ci174-33.netnam.vn
[86400] 34.174.151.202.in-addr.arpa. domain name pointer ci174-34.netnam.vn
[86400] 35.174.151.202.in-addr.arpa. domain name pointer ci174-35.netnam.vn
[86400] 36.174.151.202.in-addr.arpa. domain name pointer ci174-36.netnam.vn
[86400] 37.174.151.202.in-addr.arpa. domain name pointer ci174-37.netnam.vn
[86400] 38.174.151.202.in-addr.arpa. domain name pointer ci174-38.netnam.vn
[86400] 39.174.151.202.in-addr.arpa. domain name pointer ci174-39.netnam.vn
[86400] 40.174.151.202.in-addr.arpa. domain name pointer ci174-40.netnam.vn
[86400] 41.174.151.202.in-addr.arpa. domain name pointer ci174-41.netnam.vn
[86400] 42.174.151.202.in-addr.arpa. domain name pointer ci174-42.netnam.vn
[86400] 43.174.151.202.in-addr.arpa. domain name pointer ci174-43.netnam.vn
[86400] 44.174.151.202.in-addr.arpa. domain name pointer ci174-44.netnam.vn
[86400] 45.174.151.202.in-addr.arpa. domain name pointer ci174-45.netnam.vn
[86400] 46.174.151.202.in-addr.arpa. domain name pointer ci174-46.netnam.vn
[86400] 47.174.151.202.in-addr.arpa. domain name pointer ci174-47.netnam.vn
[86400] 48.174.151.202.in-addr.arpa. domain name pointer ci174-48.netnam.vn
[86400] 49.174.151.202.in-addr.arpa. domain name pointer ci174-49.netnam.vn
[86400] 50.174.151.202.in-addr.arpa. domain name pointer ci174-50.netnam.vn
[86400] 51.174.151.202.in-addr.arpa. domain name pointer ci174-51.netnam.vn
[86400] 52.174.151.202.in-addr.arpa. domain name pointer ci174-52.netnam.vn
[86400] 53.174.151.202.in-addr.arpa. domain name pointer ci174-53.netnam.vn
[86400] 54.174.151.202.in-addr.arpa. domain name pointer ci174-54.netnam.vn
[86400] 55.174.151.202.in-addr.arpa. domain name pointer ci174-55.netnam.vn
[86400] 56.174.151.202.in-addr.arpa. domain name pointer ci174-56.netnam.vn
[86400] 57.174.151.202.in-addr.arpa. domain name pointer ci174-57.netnam.vn
[86400] 58.174.151.202.in-addr.arpa. domain name pointer ci174-58.netnam.vn
[86400] 59.174.151.202.in-addr.arpa. domain name pointer ci174-59.netnam.vn
[86400] 60.174.151.202.in-addr.arpa. domain name pointer ci174-60.netnam.vn
[86400] 61.174.151.202.in-addr.arpa. domain name pointer ci174-61.netnam.vn
[86400] 62.174.151.202.in-addr.arpa. domain name pointer ci174-62.netnam.vn
[86400] 63.174.151.202.in-addr.arpa. domain name pointer ci174-63.netnam.vn
[86400] 64.174.151.202.in-addr.arpa. domain name pointer ci174-64.netnam.vn
[86400] 65.174.151.202.in-addr.arpa. domain name pointer ci174-65.netnam.vn
[86400] 66.174.151.202.in-addr.arpa. domain name pointer ci174-66.netnam.vn
[86400] 67.174.151.202.in-addr.arpa. domain name pointer ci174-67.netnam.vn
[86400] 68.174.151.202.in-addr.arpa. domain name pointer ci174-68.netnam.vn
[86400] 69.174.151.202.in-addr.arpa. domain name pointer ci174-69.netnam.vn
[86400] 70.174.151.202.in-addr.arpa. domain name pointer mail.phuquypoc.vn
[86400] 71.174.151.202.in-addr.arpa. domain name pointer mail.phuquypoc.vn
[86400] 72.174.151.202.in-addr.arpa. domain name pointer ci174-72.netnam.vn
[86400] 73.174.151.202.in-addr.arpa. domain name pointer ci174-73.netnam.vn
[86400] 74.174.151.202.in-addr.arpa. domain name pointer ci174-74.netnam.vn
[86400] 75.174.151.202.in-addr.arpa. domain name pointer ci174-75.netnam.vn
[86400] 76.174.151.202.in-addr.arpa. domain name pointer ci174-76.netnam.vn
[86400] 77.174.151.202.in-addr.arpa. domain name pointer mail.pvep-poc.com.vn
[86400] 78.174.151.202.in-addr.arpa. domain name pointer ci174-78.netnam.vn
[86400] 79.174.151.202.in-addr.arpa. domain name pointer ci174-79.netnam.vn
[86400] 80.174.151.202.in-addr.arpa. domain name pointer ci174-80.netnam.vn
[86400] 81.174.151.202.in-addr.arpa. domain name pointer ci174-81.netnam.vn
[86400] 82.174.151.202.in-addr.arpa. domain name pointer ci174-82.netnam.vn
[86400] 83.174.151.202.in-addr.arpa. domain name pointer ci174-83.netnam.vn
[86400] 84.174.151.202.in-addr.arpa. domain name pointer ci174-84.netnam.vn
[86400] 85.174.151.202.in-addr.arpa. domain name pointer ci174-85.netnam.vn
[86400] 86.174.151.202.in-addr.arpa. domain name pointer ci174-86.netnam.vn
[86400] 87.174.151.202.in-addr.arpa. domain name pointer ci174-87.netnam.vn
[86400] 88.174.151.202.in-addr.arpa. domain name pointer ci174-88.netnam.vn
[86400] 89.174.151.202.in-addr.arpa. domain name pointer ci174-89.netnam.vn
[86400] 90.174.151.202.in-addr.arpa. domain name pointer ci174-90.netnam.vn
[86400] 91.174.151.202.in-addr.arpa. domain name pointer ci174-91.netnam.vn
[86400] 92.174.151.202.in-addr.arpa. domain name pointer ci174-92.netnam.vn
[86400] 93.174.151.202.in-addr.arpa. domain name pointer ci174-93.netnam.vn
[86400] 94.174.151.202.in-addr.arpa. domain name pointer ci174-94.netnam.vn
[86400] 95.174.151.202.in-addr.arpa. domain name pointer ci174-95.netnam.vn
[86400] 96.174.151.202.in-addr.arpa. domain name pointer ci174-96.netnam.vn
[0] 97.174.151.202.in-addr.arpa.: valid domain but no data of requested type
[0] 98.174.151.202.in-addr.arpa.: valid domain but no data of requested type
[0] 99.174.151.202.in-addr.arpa.: valid domain but no data of requested type
[0] 100.174.151.202.in-addr.arpa.: valid domain but no data of requested type
[0] 101.174.151.202.in-addr.arpa.: valid domain but no data of requested type
[0] 102.174.151.202.in-addr.arpa.: valid domain but no data of requested type
[0] 103.174.151.202.in-addr.arpa.: valid domain but no data of requested type
[0] 104.174.151.202.in-addr.arpa.: valid domain but no data of requested type
[0] 105.174.151.202.in-addr.arpa.: valid domain but no data of requested type
[86400] 106.174.151.202.in-addr.arpa. domain name pointer webmail.hanhphuchospital.com
[86400] 107.174.151.202.in-addr.arpa. domain name pointer webmail.hanhphuchospital.com
[86400] 108.174.151.202.in-addr.arpa. domain name pointer mail.tuvansannhi.com
[0] 109.174.151.202.in-addr.arpa.: valid domain but no data of requested type
[0] 110.174.151.202.in-addr.arpa.: valid domain but no data of requested type
[0] 111.174.151.202.in-addr.arpa.: valid domain but no data of requested type
[0] 112.174.151.202.in-addr.arpa.: valid domain but no data of requested type
[0] 113.174.151.202.in-addr.arpa.: valid domain but no data of requested type
[0] 114.174.151.202.in-addr.arpa.: valid domain but no data of requested type
[0] 115.174.151.202.in-addr.arpa.: valid domain but no data of requested type
[0] 116.174.151.202.in-addr.arpa.: valid domain but no data of requested type
[0] 117.174.151.202.in-addr.arpa.: valid domain but no data of requested type
[0] 118.174.151.202.in-addr.arpa.: valid domain but no data of requested type
[0] 119.174.151.202.in-addr.arpa.: valid domain but no data of requested type
[0] 120.174.151.202.in-addr.arpa.: valid domain but no data of requested type
[0] 121.174.151.202.in-addr.arpa.: valid domain but no data of requested type
[0] 122.174.151.202.in-addr.arpa.: valid domain but no data of requested type
[0] 123.174.151.202.in-addr.arpa.: valid domain but no data of requested type
[0] 124.174.151.202.in-addr.arpa.: valid domain but no data of requested type
[0] 125.174.151.202.in-addr.arpa.: valid domain but no data of requested type
[0] 126.174.151.202.in-addr.arpa.: valid domain but no data of requested type
[0] 127.174.151.202.in-addr.arpa.: valid domain but no data of requested type
[86400] 128.174.151.202.in-addr.arpa. domain name pointer ci174-128.netnam.vn
[86400] 129.174.151.202.in-addr.arpa. domain name pointer ci174-129.netnam.vn
[86400] 130.174.151.202.in-addr.arpa. domain name pointer ci174-130.netnam.vn
[86400] 131.174.151.202.in-addr.arpa. domain name pointer ci174-131.netnam.vn
[86400] 132.174.151.202.in-addr.arpa. domain name pointer ci174-132.netnam.vn
[86400] 133.174.151.202.in-addr.arpa. domain name pointer ci174-133.netnam.vn
[86400] 134.174.151.202.in-addr.arpa. domain name pointer ci174-134.netnam.vn
[86400] 135.174.151.202.in-addr.arpa. domain name pointer ci174-135.netnam.vn
[86400] 136.174.151.202.in-addr.arpa. domain name pointer ci174-136.netnam.vn
[86400] 137.174.151.202.in-addr.arpa. domain name pointer ci174-137.netnam.vn
[86400] 138.174.151.202.in-addr.arpa. domain name pointer ci174-138.netnam.vn
[86400] 139.174.151.202.in-addr.arpa. domain name pointer ci174-139.netnam.vn
[86400] 140.174.151.202.in-addr.arpa. domain name pointer ci174-140.netnam.vn
[86400] 141.174.151.202.in-addr.arpa. domain name pointer ci174-141.netnam.vn
[86400] 142.174.151.202.in-addr.arpa. domain name pointer ci174-142.netnam.vn
[86400] 143.174.151.202.in-addr.arpa. domain name pointer ci174-143.netnam.vn
[86400] 144.174.151.202.in-addr.arpa. domain name pointer ci174-144.netnam.vn
[86400] 145.174.151.202.in-addr.arpa. domain name pointer ci174-145.netnam.vn
[86400] 146.174.151.202.in-addr.arpa. domain name pointer ci174-146.netnam.vn
[86400] 147.174.151.202.in-addr.arpa. domain name pointer ci174-147.netnam.vn
[86400] 148.174.151.202.in-addr.arpa. domain name pointer ci174-148.netnam.vn
[86400] 149.174.151.202.in-addr.arpa. domain name pointer ci174-149.netnam.vn
[86400] 150.174.151.202.in-addr.arpa. domain name pointer ci174-150.netnam.vn
[86400] 151.174.151.202.in-addr.arpa. domain name pointer ci174-151.netnam.vn
[86400] 152.174.151.202.in-addr.arpa. domain name pointer ci174-152.netnam.vn
[86400] 153.174.151.202.in-addr.arpa. domain name pointer ci174-153.netnam.vn
[86400] 154.174.151.202.in-addr.arpa. domain name pointer ci174-154.netnam.vn
[86400] 155.174.151.202.in-addr.arpa. domain name pointer ci174-155.netnam.vn
[86400] 156.174.151.202.in-addr.arpa. domain name pointer ci174-156.netnam.vn
[86400] 157.174.151.202.in-addr.arpa. domain name pointer ci174-157.netnam.vn
[86400] 158.174.151.202.in-addr.arpa. domain name pointer ci174-158.netnam.vn
[86400] 159.174.151.202.in-addr.arpa. domain name pointer ci174-159.netnam.vn
[86400] 160.174.151.202.in-addr.arpa. domain name pointer ci174-160.netnam.vn
[86400] 161.174.151.202.in-addr.arpa. domain name pointer ci174-161.netnam.vn
[86400] 162.174.151.202.in-addr.arpa. domain name pointer ci174-162.netnam.vn
[86400] 163.174.151.202.in-addr.arpa. domain name pointer ci174-163.netnam.vn
[86400] 164.174.151.202.in-addr.arpa. domain name pointer ci174-164.netnam.vn
[86400] 165.174.151.202.in-addr.arpa. domain name pointer ci174-165.netnam.vn
[86400] 166.174.151.202.in-addr.arpa. domain name pointer ci174-166.netnam.vn
[86400] 167.174.151.202.in-addr.arpa. domain name pointer ci174-167.netnam.vn
[86400] 168.174.151.202.in-addr.arpa. domain name pointer ci174-168.netnam.vn
[86400] 169.174.151.202.in-addr.arpa. domain name pointer ci174-169.netnam.vn
[86400] 170.174.151.202.in-addr.arpa. domain name pointer ci174-170.netnam.vn
[86400] 171.174.151.202.in-addr.arpa. domain name pointer ci174-171.netnam.vn
[86400] 172.174.151.202.in-addr.arpa. domain name pointer ci174-172.netnam.vn
[86400] 173.174.151.202.in-addr.arpa. domain name pointer ci174-173.netnam.vn
[86400] 174.174.151.202.in-addr.arpa. domain name pointer ci174-174.netnam.vn
[86400] 175.174.151.202.in-addr.arpa. domain name pointer ci174-175.netnam.vn
[86400] 176.174.151.202.in-addr.arpa. domain name pointer ci174-176.netnam.vn
[86400] 177.174.151.202.in-addr.arpa. domain name pointer ci174-177.netnam.vn
[86400] 178.174.151.202.in-addr.arpa. domain name pointer ci174-178.netnam.vn
[86400] 179.174.151.202.in-addr.arpa. domain name pointer ci174-179.netnam.vn
[86400] 180.174.151.202.in-addr.arpa. domain name pointer ci174-180.netnam.vn
[86400] 181.174.151.202.in-addr.arpa. domain name pointer ci174-181.netnam.vn
[86400] 182.174.151.202.in-addr.arpa. domain name pointer ci174-182.netnam.vn
[86400] 183.174.151.202.in-addr.arpa. domain name pointer ci174-183.netnam.vn
[86400] 184.174.151.202.in-addr.arpa. domain name pointer ci174-184.netnam.vn
[86400] 185.174.151.202.in-addr.arpa. domain name pointer ci174-185.netnam.vn
[86400] 186.174.151.202.in-addr.arpa. domain name pointer ci174-186.netnam.vn
[86400] 187.174.151.202.in-addr.arpa. domain name pointer ci174-187.netnam.vn
[86400] 188.174.151.202.in-addr.arpa. domain name pointer ci174-188.netnam.vn
[86400] 189.174.151.202.in-addr.arpa. domain name pointer ci174-189.netnam.vn
[86400] 190.174.151.202.in-addr.arpa. domain name pointer ci174-190.netnam.vn
[86400] 191.174.151.202.in-addr.arpa. domain name pointer ci174-191.netnam.vn
[86400] 192.174.151.202.in-addr.arpa. domain name pointer ci174-192.netnam.vn
[86400] 193.174.151.202.in-addr.arpa. domain name pointer ci174-193.netnam.vn
[86400] 194.174.151.202.in-addr.arpa. domain name pointer mailbk.cybersoft-vn.com
[86400] 195.174.151.202.in-addr.arpa. domain name pointer ci174-195.netnam.vn
[86400] 196.174.151.202.in-addr.arpa. domain name pointer ci174-196.netnam.vn
[86400] 197.174.151.202.in-addr.arpa. domain name pointer ci174-197.netnam.vn
[86400] 198.174.151.202.in-addr.arpa. domain name pointer ci174-198.netnam.vn
[86400] 199.174.151.202.in-addr.arpa. domain name pointer ci174-199.netnam.vn
[86400] 200.174.151.202.in-addr.arpa. domain name pointer ci174-200.netnam.vn
[86400] 201.174.151.202.in-addr.arpa. domain name pointer ci174-201.netnam.vn
[86400] 202.174.151.202.in-addr.arpa. domain name pointer ci174-202.netnam.vn
[86400] 203.174.151.202.in-addr.arpa. domain name pointer ci174-203.netnam.vn
[86400] 204.174.151.202.in-addr.arpa. domain name pointer ci174-204.netnam.vn
[86400] 205.174.151.202.in-addr.arpa. domain name pointer ci174-205.netnam.vn
[86400] 206.174.151.202.in-addr.arpa. domain name pointer ci174-206.netnam.vn
[86400] 207.174.151.202.in-addr.arpa. domain name pointer ci174-207.netnam.vn
[86400] 208.174.151.202.in-addr.arpa. domain name pointer ci174-208.netnam.vn
[86400] 209.174.151.202.in-addr.arpa. domain name pointer ci174-209.netnam.vn
[86400] 210.174.151.202.in-addr.arpa. domain name pointer ci174-210.netnam.vn
[86400] 211.174.151.202.in-addr.arpa. domain name pointer ci174-211.netnam.vn
[86400] 212.174.151.202.in-addr.arpa. domain name pointer ci174-212.netnam.vn
[86400] 213.174.151.202.in-addr.arpa. domain name pointer ci174-213.netnam.vn
[86400] 214.174.151.202.in-addr.arpa. domain name pointer ci174-214.netnam.vn
[86400] 215.174.151.202.in-addr.arpa. domain name pointer ci174-215.netnam.vn
[86400] 216.174.151.202.in-addr.arpa. domain name pointer ci174-216.netnam.vn
[86400] 217.174.151.202.in-addr.arpa. domain name pointer ci174-217.netnam.vn
[86400] 218.174.151.202.in-addr.arpa. domain name pointer ci174-218.netnam.vn
[86400] 219.174.151.202.in-addr.arpa. domain name pointer ci174-219.netnam.vn
[86400] 220.174.151.202.in-addr.arpa. domain name pointer ci174-220.netnam.vn
[86400] 221.174.151.202.in-addr.arpa. domain name pointer ci174-221.netnam.vn
[86400] 222.174.151.202.in-addr.arpa. domain name pointer ci174-222.netnam.vn
[86400] 223.174.151.202.in-addr.arpa. domain name pointer ci174-223.netnam.vn
[86400] 224.174.151.202.in-addr.arpa. domain name pointer ci174-224.netnam.vn
[86400] 225.174.151.202.in-addr.arpa. domain name pointer ci174-225.netnam.vn
[86400] 226.174.151.202.in-addr.arpa. domain name pointer ci174-226.netnam.vn
[86400] 227.174.151.202.in-addr.arpa. domain name pointer mail.cybersoft-vn.com
[86400] 228.174.151.202.in-addr.arpa. domain name pointer ci174-228.netnam.vn
[86400] 229.174.151.202.in-addr.arpa. domain name pointer ci174-229.netnam.vn
[86400] 230.174.151.202.in-addr.arpa. domain name pointer ci174-230.netnam.vn
[86400] 231.174.151.202.in-addr.arpa. domain name pointer ci174-231.netnam.vn
[86400] 232.174.151.202.in-addr.arpa. domain name pointer ci174-232.netnam.vn
[86400] 233.174.151.202.in-addr.arpa. domain name pointer ci174-233.netnam.vn
[86400] 234.174.151.202.in-addr.arpa. domain name pointer ci174-234.netnam.vn
[86400] 235.174.151.202.in-addr.arpa. domain name pointer ci174-235.netnam.vn
[86400] 236.174.151.202.in-addr.arpa. domain name pointer ci174-236.netnam.vn
[86400] 237.174.151.202.in-addr.arpa. domain name pointer ci174-237.netnam.vn
[86400] 238.174.151.202.in-addr.arpa. domain name pointer ci174-238.netnam.vn
[86400] 239.174.151.202.in-addr.arpa. domain name pointer ci174-239.netnam.vn
[86400] 240.174.151.202.in-addr.arpa. domain name pointer ci174-240.netnam.vn
[86400] 241.174.151.202.in-addr.arpa. domain name pointer ci174-241.netnam.vn
[86400] 242.174.151.202.in-addr.arpa. domain name pointer ci174-242.netnam.vn
[86400] 243.174.151.202.in-addr.arpa. domain name pointer ci174-243.netnam.vn
[86400] 244.174.151.202.in-addr.arpa. domain name pointer ci174-244.netnam.vn
[86400] 245.174.151.202.in-addr.arpa. domain name pointer ci174-245.netnam.vn
[86400] 246.174.151.202.in-addr.arpa. domain name pointer ci174-246.netnam.vn
[86400] 247.174.151.202.in-addr.arpa. domain name pointer ci174-247.netnam.vn
[86400] 248.174.151.202.in-addr.arpa. domain name pointer ci174-248.netnam.vn
[86400] 249.174.151.202.in-addr.arpa. domain name pointer ci174-249.netnam.vn
[86400] 250.174.151.202.in-addr.arpa. domain name pointer ci174-250.netnam.vn
[86400] 251.174.151.202.in-addr.arpa. domain name pointer ci174-251.netnam.vn
[86400] 252.174.151.202.in-addr.arpa. domain name pointer ci174-252.netnam.vn
[86400] 253.174.151.202.in-addr.arpa. domain name pointer ci174-253.netnam.vn
[86400] 254.174.151.202.in-addr.arpa. domain name pointer ci174-254.netnam.vn
[0] 255.174.151.202.in-addr.arpa.: domain name does not exist