[0] 0.231.86.210.in-addr.arpa.: domain name does not exist
[86400] 1.231.86.210.in-addr.arpa. domain name pointer ci231-1.netnam.vn
[86400] 2.231.86.210.in-addr.arpa. domain name pointer ci231-2.netnam.vn
[86400] 3.231.86.210.in-addr.arpa. domain name pointer cskh.bidv.com.vn
[86400] 4.231.86.210.in-addr.arpa. domain name pointer hosting.netnam.com
[86400] 5.231.86.210.in-addr.arpa. domain name pointer ci231-5.netnam.vn
[86400] 6.231.86.210.in-addr.arpa. domain name pointer ci231-6.netnam.vn
[86400] 7.231.86.210.in-addr.arpa. domain name pointer ci231-7.netnam.vn
[86400] 8.231.86.210.in-addr.arpa. domain name pointer ci231-8.netnam.vn
[86400] 9.231.86.210.in-addr.arpa. domain name pointer receive.netnam.com
[86400] 10.231.86.210.in-addr.arpa. domain name pointer ci231-10.netnam.vn
[86400] 11.231.86.210.in-addr.arpa. domain name pointer ci231-11.netnam.vn
[86400] 12.231.86.210.in-addr.arpa. domain name pointer ci231-12.netnam.vn
[86400] 13.231.86.210.in-addr.arpa. domain name pointer ci231-13.netnam.vn
[86400] 14.231.86.210.in-addr.arpa. domain name pointer ci231-14.netnam.vn
[86400] 15.231.86.210.in-addr.arpa. domain name pointer ci231-15.netnam.vn
[86400] 16.231.86.210.in-addr.arpa. domain name pointer ci231-16.netnam.vn
[86400] 17.231.86.210.in-addr.arpa. domain name pointer mail.inoxhoabinh.vn
[86400] 18.231.86.210.in-addr.arpa. domain name pointer ci231-18.netnam.vn
[86400] 19.231.86.210.in-addr.arpa. domain name pointer ci231-19.netnam.vn
[86400] 20.231.86.210.in-addr.arpa. domain name pointer ci231-20.netnam.vn
[86400] 21.231.86.210.in-addr.arpa. domain name pointer ci231-21.netnam.vn
[86400] 22.231.86.210.in-addr.arpa. domain name pointer mail.furamavietnam.com
[86400] 23.231.86.210.in-addr.arpa. domain name pointer ci231-23.netnam.vn
[86400] 24.231.86.210.in-addr.arpa. domain name pointer ci231-24.netnam.vn
[86400] 25.231.86.210.in-addr.arpa. domain name pointer ci231-25.netnam.vn
[86400] 26.231.86.210.in-addr.arpa. domain name pointer ci231-26.netnam.vn
[86400] 27.231.86.210.in-addr.arpa. domain name pointer ci231-27.netnam.vn
[86400] 28.231.86.210.in-addr.arpa. domain name pointer ci231-28.netnam.vn
[86400] 29.231.86.210.in-addr.arpa. domain name pointer ci231-29.netnam.vn
[86400] 30.231.86.210.in-addr.arpa. domain name pointer receive.khcn.vpbank.com.vn
[86400] 31.231.86.210.in-addr.arpa. domain name pointer ci231-31.netnam.vn
[86400] 32.231.86.210.in-addr.arpa. domain name pointer ci231-32.netnam.vn
[86400] 33.231.86.210.in-addr.arpa. domain name pointer ci231-33.netnam.vn
[86400] 34.231.86.210.in-addr.arpa. domain name pointer newsletter.netnam.com
[86400] 35.231.86.210.in-addr.arpa. domain name pointer mx02.netnam.com
[86400] 36.231.86.210.in-addr.arpa. domain name pointer ci231-36.netnam.vn
[86400] 37.231.86.210.in-addr.arpa. domain name pointer ci231-37.netnam.vn
[86400] 38.231.86.210.in-addr.arpa. domain name pointer ci231-38.netnam.vn
[86400] 39.231.86.210.in-addr.arpa. domain name pointer mail.1vietnam.com
[86400] 40.231.86.210.in-addr.arpa. domain name pointer eds-postfix.elpis.vn
[86400] 41.231.86.210.in-addr.arpa. domain name pointer ci231-41.netnam.vn
[86400] 42.231.86.210.in-addr.arpa. domain name pointer ci231-42.netnam.vn
[86400] 43.231.86.210.in-addr.arpa. domain name pointer ci231-43.netnam.vn
[86400] 44.231.86.210.in-addr.arpa. domain name pointer ci231-44.netnam.vn
[86400] 45.231.86.210.in-addr.arpa. domain name pointer ci231-45.netnam.vn
[86400] 46.231.86.210.in-addr.arpa. domain name pointer ci231-46.netnam.vn
[86400] 47.231.86.210.in-addr.arpa. domain name pointer ci231-47.netnam.vn
[86400] 48.231.86.210.in-addr.arpa. domain name pointer ci231-48.netnam.vn
[86400] 49.231.86.210.in-addr.arpa. domain name pointer ci231-49.netnam.vn
[86400] 50.231.86.210.in-addr.arpa. domain name pointer khcn.vpbank.com.vn
[86400] 51.231.86.210.in-addr.arpa. domain name pointer mail.mym.vn
[0] 52.231.86.210.in-addr.arpa.: domain name does not exist
[86400] 53.231.86.210.in-addr.arpa. domain name pointer monitor-noc-slave.netnam.vn
[86400] 54.231.86.210.in-addr.arpa. domain name pointer ci231-54.netnam.vn
[86400] 55.231.86.210.in-addr.arpa. domain name pointer ci231-55.netnam.vn
[86400] 56.231.86.210.in-addr.arpa. domain name pointer ci231-56.netnam.vn
[86400] 57.231.86.210.in-addr.arpa. domain name pointer ci231-57.netnam.vn
[86400] 58.231.86.210.in-addr.arpa. domain name pointer webmail.vast.ac.vn
[86400] 59.231.86.210.in-addr.arpa. domain name pointer ci231-59.netnam.vn
[86400] 60.231.86.210.in-addr.arpa. domain name pointer ci231-60.netnam.vn
[86400] 61.231.86.210.in-addr.arpa. domain name pointer ci231-61.netnam.vn
[86400] 62.231.86.210.in-addr.arpa. domain name pointer ci231-62.netnam.vn
[86400] 63.231.86.210.in-addr.arpa. domain name pointer ci231-63.netnam.vn
[86400] 64.231.86.210.in-addr.arpa. domain name pointer ci231-64.netnam.vn
[86400] 65.231.86.210.in-addr.arpa. domain name pointer ci231-65.netnam.vn
[86400] 66.231.86.210.in-addr.arpa. domain name pointer ci231-66.netnam.vn
[86400] 67.231.86.210.in-addr.arpa. domain name pointer ci231-67.netnam.vn
[86400] 68.231.86.210.in-addr.arpa. domain name pointer ci231-68.netnam.vn
[86400] 69.231.86.210.in-addr.arpa. domain name pointer ci231-69.netnam.vn
[86400] 70.231.86.210.in-addr.arpa. domain name pointer ci231-70.netnam.vn
[86400] 71.231.86.210.in-addr.arpa. domain name pointer ci231-71.netnam.vn
[86400] 72.231.86.210.in-addr.arpa. domain name pointer ci231-72.netnam.vn
[86400] 73.231.86.210.in-addr.arpa. domain name pointer monitor.cnttvietnam.vn
[86400] 74.231.86.210.in-addr.arpa. domain name pointer ci231-74.netnam.vn
[86400] 75.231.86.210.in-addr.arpa. domain name pointer ci231-75.netnam.vn
[86400] 76.231.86.210.in-addr.arpa. domain name pointer ci231-76.netnam.vn
[86400] 77.231.86.210.in-addr.arpa. domain name pointer ci231-77.netnam.vn
[86400] 78.231.86.210.in-addr.arpa. domain name pointer mail.risemountresort.com
[86400] 79.231.86.210.in-addr.arpa. domain name pointer ci231-79.netnam.vn
[86400] 80.231.86.210.in-addr.arpa. domain name pointer ci231-80.netnam.vn
[86400] 81.231.86.210.in-addr.arpa. domain name pointer mail.discovereast.vn
[86400] 82.231.86.210.in-addr.arpa. domain name pointer mail.goldsun.vn
[86400] 83.231.86.210.in-addr.arpa. domain name pointer ci231-83.netnam.vn
[86400] 84.231.86.210.in-addr.arpa. domain name pointer ci231-84.netnam.vn
[86400] 85.231.86.210.in-addr.arpa. domain name pointer www.bayo.vn
[86400] 86.231.86.210.in-addr.arpa. domain name pointer hostinggw01.netnam.vn
[86400] 87.231.86.210.in-addr.arpa. domain name pointer ci231-87.netnam.vn
[86400] 88.231.86.210.in-addr.arpa. domain name pointer mx01.netnam.com
[86400] 89.231.86.210.in-addr.arpa. domain name pointer active.pullman-danang.com
[86400] 90.231.86.210.in-addr.arpa. domain name pointer passive.pullman-danang.com
[86400] 91.231.86.210.in-addr.arpa. domain name pointer ci231-91.netnam.vn
[86400] 92.231.86.210.in-addr.arpa. domain name pointer ci231-92.netnam.vn
[86400] 93.231.86.210.in-addr.arpa. domain name pointer mail.mbbank.vn
[86400] 94.231.86.210.in-addr.arpa. domain name pointer receive1.netnam.com
[86400] 95.231.86.210.in-addr.arpa. domain name pointer ci231-95.netnam.vn
[86400] 96.231.86.210.in-addr.arpa. domain name pointer ci231-96.netnam.vn
[86400] 97.231.86.210.in-addr.arpa. domain name pointer ci231-97.netnam.vn
[86400] 98.231.86.210.in-addr.arpa. domain name pointer smtp.mart4viet.com
[86400] 99.231.86.210.in-addr.arpa. domain name pointer mail.hoithaoquocgiacntt.ac.vn cpanel.netnam.vn mail.caobang.gov.vn
[0] 100.231.86.210.in-addr.arpa.: domain name does not exist
[86400] 101.231.86.210.in-addr.arpa. domain name pointer mail.hoithaoquocgiacntt.ac.vn
[0] 102.231.86.210.in-addr.arpa.: domain name does not exist
[86400] 103.231.86.210.in-addr.arpa. domain name pointer mail.isponre.gov.vn
[86400] 104.231.86.210.in-addr.arpa. domain name pointer ci231-104.netnam.vn
[86400] 105.231.86.210.in-addr.arpa. domain name pointer ci231-105.netnam.vn
[86400] 106.231.86.210.in-addr.arpa. domain name pointer mail.vietsoftware.com
[86400] 107.231.86.210.in-addr.arpa. domain name pointer ci231-107.netnam.vn
[86400] 108.231.86.210.in-addr.arpa. domain name pointer sendGW1.khcn.vpbank.com.vn
[86400] 109.231.86.210.in-addr.arpa. domain name pointer sendGW2.khcn.vpbank.com.vn
[86400] 110.231.86.210.in-addr.arpa. domain name pointer ci231-110.netnam.vn
[86400] 111.231.86.210.in-addr.arpa. domain name pointer ci231-111.netnam.vn
[86400] 112.231.86.210.in-addr.arpa. domain name pointer ci231-112.netnam.vn
[86400] 113.231.86.210.in-addr.arpa. domain name pointer sendGW3.khcn.vpbank.com.vn
[86400] 114.231.86.210.in-addr.arpa. domain name pointer sendGW4.khcn.vpbank.com.vn
[86400] 115.231.86.210.in-addr.arpa. domain name pointer ci231-115.netnam.vn
[86400] 116.231.86.210.in-addr.arpa. domain name pointer ci231-116.netnam.vn
[86400] 117.231.86.210.in-addr.arpa. domain name pointer ci231-117.netnam.vn
[86400] 118.231.86.210.in-addr.arpa. domain name pointer ci231-118.netnam.vn
[86400] 119.231.86.210.in-addr.arpa. domain name pointer ci231-119.netnam.vn
[86400] 120.231.86.210.in-addr.arpa. domain name pointer ci231-120.netnam.vn
[86400] 121.231.86.210.in-addr.arpa. domain name pointer ci231-121.netnam.vn
[86400] 122.231.86.210.in-addr.arpa. domain name pointer ci231-122.netnam.vn
[86400] 123.231.86.210.in-addr.arpa. domain name pointer vesta.netnam.com
[86400] 124.231.86.210.in-addr.arpa. domain name pointer ci231-124.netnam.vn
[86400] 125.231.86.210.in-addr.arpa. domain name pointer ci231-125.netnam.vn
[86400] 126.231.86.210.in-addr.arpa. domain name pointer emsys.netnam.com
[86400] 127.231.86.210.in-addr.arpa. domain name pointer ci231-127.netnam.vn
[86400] 128.231.86.210.in-addr.arpa. domain name pointer ci231-128.netnam.vn
[86400] 129.231.86.210.in-addr.arpa. domain name pointer ci231-129.netnam.vn
[86400] 130.231.86.210.in-addr.arpa. domain name pointer ci231-130.netnam.vn
[86400] 131.231.86.210.in-addr.arpa. domain name pointer ci231-131.netnam.vn
[86400] 132.231.86.210.in-addr.arpa. domain name pointer ci231-132.netnam.vn
[86400] 133.231.86.210.in-addr.arpa. domain name pointer ci231-133.netnam.vn
[86400] 134.231.86.210.in-addr.arpa. domain name pointer ci231-134.netnam.vn
[86400] 135.231.86.210.in-addr.arpa. domain name pointer ci231-135.netnam.vn
[86400] 136.231.86.210.in-addr.arpa. domain name pointer ci231-136.netnam.vn
[86400] 137.231.86.210.in-addr.arpa. domain name pointer ci231-137.netnam.vn
[86400] 138.231.86.210.in-addr.arpa. domain name pointer mail.vast.vn
[86400] 139.231.86.210.in-addr.arpa. domain name pointer ci231-139.netnam.vn
[86400] 140.231.86.210.in-addr.arpa. domain name pointer ci231-140.netnam.vn
[86400] 141.231.86.210.in-addr.arpa. domain name pointer ci231-141.netnam.vn
[86400] 142.231.86.210.in-addr.arpa. domain name pointer ci231-142.netnam.vn
[86400] 143.231.86.210.in-addr.arpa. domain name pointer ci231-143.netnam.vn
[86400] 144.231.86.210.in-addr.arpa. domain name pointer ci231-144.netnam.vn
[86400] 145.231.86.210.in-addr.arpa. domain name pointer ci231-145.netnam.vn
[86400] 146.231.86.210.in-addr.arpa. domain name pointer ci231-146.netnam.vn
[86400] 147.231.86.210.in-addr.arpa. domain name pointer ci231-147.netnam.vn
[86400] 148.231.86.210.in-addr.arpa. domain name pointer ci231-148.netnam.vn
[86400] 149.231.86.210.in-addr.arpa. domain name pointer ci231-149.netnam.vn
[86400] 150.231.86.210.in-addr.arpa. domain name pointer ci231-150.netnam.vn
[86400] 151.231.86.210.in-addr.arpa. domain name pointer ci231-151.netnam.vn
[86400] 152.231.86.210.in-addr.arpa. domain name pointer ci231-152.netnam.vn
[86400] 153.231.86.210.in-addr.arpa. domain name pointer mail.vnsc.org.vn
[86400] 154.231.86.210.in-addr.arpa. domain name pointer ci231-154.netnam.vn
[86400] 155.231.86.210.in-addr.arpa. domain name pointer ci231-155.netnam.vn
[86400] 156.231.86.210.in-addr.arpa. domain name pointer ci231-156.netnam.vn
[86400] 157.231.86.210.in-addr.arpa. domain name pointer ci231-157.netnam.vn
[86400] 158.231.86.210.in-addr.arpa. domain name pointer ci231-158.netnam.vn
[86400] 159.231.86.210.in-addr.arpa. domain name pointer ci231-159.netnam.vn
[86400] 160.231.86.210.in-addr.arpa. domain name pointer ci231-160.netnam.vn
[86400] 161.231.86.210.in-addr.arpa. domain name pointer ci231-161.netnam.vn
[86400] 162.231.86.210.in-addr.arpa. domain name pointer ci231-162.netnam.vn
[86400] 163.231.86.210.in-addr.arpa. domain name pointer ci231-163.netnam.vn
[86400] 164.231.86.210.in-addr.arpa. domain name pointer ci231-164.netnam.vn
[86400] 165.231.86.210.in-addr.arpa. domain name pointer ci231-165.netnam.vn
[86400] 166.231.86.210.in-addr.arpa. domain name pointer ci231-166.netnam.vn
[86400] 167.231.86.210.in-addr.arpa. domain name pointer ci231-167.netnam.vn
[86400] 168.231.86.210.in-addr.arpa. domain name pointer ci231-168.netnam.vn
[86400] 169.231.86.210.in-addr.arpa. domain name pointer ci231-169.netnam.vn
[86400] 170.231.86.210.in-addr.arpa. domain name pointer ci231-170.netnam.vn
[86400] 171.231.86.210.in-addr.arpa. domain name pointer ci231-171.netnam.vn
[86400] 172.231.86.210.in-addr.arpa. domain name pointer ci231-172.netnam.vn
[86400] 173.231.86.210.in-addr.arpa. domain name pointer ci231-173.netnam.vn
[86400] 174.231.86.210.in-addr.arpa. domain name pointer ci231-174.netnam.vn
[86400] 175.231.86.210.in-addr.arpa. domain name pointer ci231-175.netnam.vn
[86400] 176.231.86.210.in-addr.arpa. domain name pointer ci231-176.netnam.vn
[86400] 177.231.86.210.in-addr.arpa. domain name pointer ci231-177.netnam.vn
[86400] 178.231.86.210.in-addr.arpa. domain name pointer ci231-178.netnam.vn
[86400] 179.231.86.210.in-addr.arpa. domain name pointer ci231-179.netnam.vn
[86400] 180.231.86.210.in-addr.arpa. domain name pointer ci231-180.netnam.vn
[86400] 181.231.86.210.in-addr.arpa. domain name pointer ci231-181.netnam.vn
[86400] 182.231.86.210.in-addr.arpa. domain name pointer ci231-182.netnam.vn
[86400] 183.231.86.210.in-addr.arpa. domain name pointer ci231-183.netnam.vn
[86400] 184.231.86.210.in-addr.arpa. domain name pointer ci231-184.netnam.vn
[86400] 185.231.86.210.in-addr.arpa. domain name pointer ci231-185.netnam.vn
[86400] 186.231.86.210.in-addr.arpa. domain name pointer ci231-186.netnam.vn
[86400] 187.231.86.210.in-addr.arpa. domain name pointer ci231-187.netnam.vn
[86400] 188.231.86.210.in-addr.arpa. domain name pointer ci231-188.netnam.vn
[86400] 189.231.86.210.in-addr.arpa. domain name pointer ci231-189.netnam.vn
[86400] 190.231.86.210.in-addr.arpa. domain name pointer ci231-190.netnam.vn
[86400] 191.231.86.210.in-addr.arpa. domain name pointer ci231-191.netnam.vn
[86400] 192.231.86.210.in-addr.arpa. domain name pointer ci231-192.netnam.vn
[86400] 193.231.86.210.in-addr.arpa. domain name pointer ci231-193.netnam.vn
[86400] 194.231.86.210.in-addr.arpa. domain name pointer ci231-194.netnam.vn
[86400] 195.231.86.210.in-addr.arpa. domain name pointer ci231-195.netnam.vn
[86400] 196.231.86.210.in-addr.arpa. domain name pointer ci231-196.netnam.vn
[86400] 197.231.86.210.in-addr.arpa. domain name pointer ci231-197.netnam.vn
[86400] 198.231.86.210.in-addr.arpa. domain name pointer ci231-198.netnam.vn
[86400] 199.231.86.210.in-addr.arpa. domain name pointer ci231-199.netnam.vn
[86400] 200.231.86.210.in-addr.arpa. domain name pointer ci231-200.netnam.vn
[86400] 201.231.86.210.in-addr.arpa. domain name pointer ci231-201.netnam.vn
[86400] 202.231.86.210.in-addr.arpa. domain name pointer ci231-202.netnam.vn
[86400] 203.231.86.210.in-addr.arpa. domain name pointer ci231-203.netnam.vn
[86400] 204.231.86.210.in-addr.arpa. domain name pointer ci231-204.netnam.vn
[86400] 205.231.86.210.in-addr.arpa. domain name pointer ci231-205.netnam.vn
[86400] 206.231.86.210.in-addr.arpa. domain name pointer ci231-206.netnam.vn
[86400] 207.231.86.210.in-addr.arpa. domain name pointer ci231-207.netnam.vn
[86400] 208.231.86.210.in-addr.arpa. domain name pointer ci231-208.netnam.vn
[86400] 209.231.86.210.in-addr.arpa. domain name pointer ci231-209.netnam.vn
[86400] 210.231.86.210.in-addr.arpa. domain name pointer ci231-210.netnam.vn
[86400] 211.231.86.210.in-addr.arpa. domain name pointer ci231-211.netnam.vn
[86400] 212.231.86.210.in-addr.arpa. domain name pointer ci231-212.netnam.vn
[86400] 213.231.86.210.in-addr.arpa. domain name pointer ci231-213.netnam.vn
[86400] 214.231.86.210.in-addr.arpa. domain name pointer ci231-214.netnam.vn
[86400] 215.231.86.210.in-addr.arpa. domain name pointer ci231-215.netnam.vn
[86400] 216.231.86.210.in-addr.arpa. domain name pointer ci231-216.netnam.vn
[86400] 217.231.86.210.in-addr.arpa. domain name pointer ci231-217.netnam.vn
[86400] 218.231.86.210.in-addr.arpa. domain name pointer ci231-218.netnam.vn
[86400] 219.231.86.210.in-addr.arpa. domain name pointer ci231-219.netnam.vn
[86400] 220.231.86.210.in-addr.arpa. domain name pointer ci231-220.netnam.vn
[86400] 221.231.86.210.in-addr.arpa. domain name pointer ci231-221.netnam.vn
[86400] 222.231.86.210.in-addr.arpa. domain name pointer ci231-222.netnam.vn
[86400] 223.231.86.210.in-addr.arpa. domain name pointer ci231-223.netnam.vn
[86400] 224.231.86.210.in-addr.arpa. domain name pointer ci231-224.netnam.vn
[86400] 225.231.86.210.in-addr.arpa. domain name pointer ci231-225.netnam.vn
[86400] 226.231.86.210.in-addr.arpa. domain name pointer ci231-226.netnam.vn
[86400] 227.231.86.210.in-addr.arpa. domain name pointer ci231-227.netnam.vn
[86400] 228.231.86.210.in-addr.arpa. domain name pointer ci231-228.netnam.vn
[86400] 229.231.86.210.in-addr.arpa. domain name pointer ci231-229.netnam.vn
[86400] 230.231.86.210.in-addr.arpa. domain name pointer ci231-230.netnam.vn
[86400] 231.231.86.210.in-addr.arpa. domain name pointer ci231-231.netnam.vn
[86400] 232.231.86.210.in-addr.arpa. domain name pointer ci231-232.netnam.vn
[86400] 233.231.86.210.in-addr.arpa. domain name pointer ci231-233.netnam.vn
[86400] 234.231.86.210.in-addr.arpa. domain name pointer ci231-234.netnam.vn
[86400] 235.231.86.210.in-addr.arpa. domain name pointer ci231-235.netnam.vn
[86400] 236.231.86.210.in-addr.arpa. domain name pointer ci231-236.netnam.vn
[86400] 237.231.86.210.in-addr.arpa. domain name pointer ci231-237.netnam.vn
[86400] 238.231.86.210.in-addr.arpa. domain name pointer ci231-238.netnam.vn
[86400] 239.231.86.210.in-addr.arpa. domain name pointer ci231-239.netnam.vn
[86400] 240.231.86.210.in-addr.arpa. domain name pointer ci231-240.netnam.vn
[86400] 241.231.86.210.in-addr.arpa. domain name pointer ci231-241.netnam.vn
[86400] 242.231.86.210.in-addr.arpa. domain name pointer ci231-242.netnam.vn
[86400] 243.231.86.210.in-addr.arpa. domain name pointer ci231-243.netnam.vn
[86400] 244.231.86.210.in-addr.arpa. domain name pointer ci231-244.netnam.vn
[86400] 245.231.86.210.in-addr.arpa. domain name pointer ci231-245.netnam.vn
[86400] 246.231.86.210.in-addr.arpa. domain name pointer ci231-246.netnam.vn
[86400] 247.231.86.210.in-addr.arpa. domain name pointer ci231-247.netnam.vn
[86400] 248.231.86.210.in-addr.arpa. domain name pointer ci231-248.netnam.vn
[86400] 249.231.86.210.in-addr.arpa. domain name pointer ci231-249.netnam.vn
[86400] 250.231.86.210.in-addr.arpa. domain name pointer ci231-250.netnam.vn
[86400] 251.231.86.210.in-addr.arpa. domain name pointer ci231-251.netnam.vn
[86400] 252.231.86.210.in-addr.arpa. domain name pointer ci231-252.netnam.vn
[86400] 253.231.86.210.in-addr.arpa. domain name pointer ci231-253.netnam.vn
[86400] 254.231.86.210.in-addr.arpa. domain name pointer ci231-254.netnam.vn
[0] 255.231.86.210.in-addr.arpa.: domain name does not exist