[0] 0.16.215.129.in-addr.arpa.: domain name does not exist
[86400] 1.16.215.129.in-addr.arpa. domain name pointer backup.ed.ac.uk
[86400] 2.16.215.129.in-addr.arpa. domain name pointer nas-test-kb1.is.ed.ac.uk
[86400] 3.16.215.129.in-addr.arpa. domain name pointer nas-test-at1.is.ed.ac.uk
[600] 4.16.215.129.in-addr.arpa. domain name pointer nas-test-kb1-ctdb.is.ed.ac.uk
[600] 5.16.215.129.in-addr.arpa. domain name pointer nas-test-at1-ctdb.is.ed.ac.uk
[86400] 6.16.215.129.in-addr.arpa. domain name pointer moonshot-ssh.is.ed.ac.uk
[86400] 7.16.215.129.in-addr.arpa. domain name pointer lac-sdlc-sruc-test.is.ed.ac.uk
[86400] 8.16.215.129.in-addr.arpa. domain name pointer dec.ease.ed.ac.uk
[86400] 9.16.215.129.in-addr.arpa. domain name pointer def.ease.ed.ac.uk
[86400] 10.16.215.129.in-addr.arpa. domain name pointer loire.is.ed.ac.uk
[86400] 11.16.215.129.in-addr.arpa. domain name pointer tagus.is.ed.ac.uk
[86400] 12.16.215.129.in-addr.arpa. domain name pointer thames.is.ed.ac.uk
[86400] 13.16.215.129.in-addr.arpa. domain name pointer gordon-test-machine.is.ed.ac.uk
[86400] 14.16.215.129.in-addr.arpa. domain name pointer holyrood.ed.ac.uk
[86400] 15.16.215.129.in-addr.arpa. domain name pointer markdown.is.ed.ac.uk
[86400] 16.16.215.129.in-addr.arpa. domain name pointer cas.ease.ed.ac.uk
[86400] 17.16.215.129.in-addr.arpa. domain name pointer perm.ease.ed.ac.uk
[86400] 18.16.215.129.in-addr.arpa. domain name pointer mal.ease.ed.ac.uk
[86400] 19.16.215.129.in-addr.arpa. domain name pointer rel.ease.ed.ac.uk
[900] 20.16.215.129.in-addr.arpa. domain name pointer pilton.ucs.ed.ac.uk
[86400] 21.16.215.129.in-addr.arpa. domain name pointer nas-live-kb1.is.ed.ac.uk
[86400] 22.16.215.129.in-addr.arpa. domain name pointer nas-live-kb2.is.ed.ac.uk
[86400] 23.16.215.129.in-addr.arpa. domain name pointer nas-live-at1.is.ed.ac.uk
[86400] 24.16.215.129.in-addr.arpa. domain name pointer nas-live-at2.is.ed.ac.uk
[86400] 25.16.215.129.in-addr.arpa. domain name pointer nas-live-kb1-ctdb.is.ed.ac.uk
[86400] 26.16.215.129.in-addr.arpa. domain name pointer nas-live-at1-ctdb.is.ed.ac.uk
[86400] 27.16.215.129.in-addr.arpa. domain name pointer lac-ezproxy-dev4.is.ed.ac.uk
[86400] 28.16.215.129.in-addr.arpa. domain name pointer lac-ezproxy-dev5.is.ed.ac.uk
[86400] 29.16.215.129.in-addr.arpa. domain name pointer lac-ezproxy-dev6.is.ed.ac.uk
[86400] 30.16.215.129.in-addr.arpa. domain name pointer lac-ezproxy-live3.is.ed.ac.uk
[86400] 31.16.215.129.in-addr.arpa. domain name pointer lac-ezproxy-live4.is.ed.ac.uk
[0] 32.16.215.129.in-addr.arpa.: domain name does not exist
[86400] 33.16.215.129.in-addr.arpa. domain name pointer nas-sandbox-kb1.is.ed.ac.uk
[86400] 34.16.215.129.in-addr.arpa. domain name pointer nas-sandbox-at1.is.ed.ac.uk
[86400] 35.16.215.129.in-addr.arpa. domain name pointer nas-sandbox-kb1-ctdb.is.ed.ac.uk
[86400] 36.16.215.129.in-addr.arpa. domain name pointer nas-sandbox-at1-ctdb.is.ed.ac.uk
[86400] 37.16.215.129.in-addr.arpa. domain name pointer sympa-red.is.ed.ac.uk
[86400] 38.16.215.129.in-addr.arpa. domain name pointer nls-at1.is.ed.ac.uk
[86400] 39.16.215.129.in-addr.arpa. domain name pointer avocado.is.ed.ac.uk
[86400] 40.16.215.129.in-addr.arpa. domain name pointer nls-dev.is.ed.ac.uk
[86400] 41.16.215.129.in-addr.arpa. domain name pointer nls-test.is.ed.ac.uk
[86400] 42.16.215.129.in-addr.arpa. domain name pointer nls-bc.is.ed.ac.uk
[86400] 43.16.215.129.in-addr.arpa. domain name pointer ug-centos7.is.ed.ac.uk
[86400] 44.16.215.129.in-addr.arpa. domain name pointer zen.is.ed.ac.uk
[86400] 45.16.215.129.in-addr.arpa. domain name pointer zen-master.is.ed.ac.uk
[86400] 46.16.215.129.in-addr.arpa. domain name pointer zen-collector.is.ed.ac.uk
[86400] 47.16.215.129.in-addr.arpa. domain name pointer zen-analytics.is.ed.ac.uk
[86400] 48.16.215.129.in-addr.arpa. domain name pointer netscaler-vlan16-snip.is.ed.ac.uk
[86400] 49.16.215.129.in-addr.arpa. domain name pointer lac-luna-live4.is.ed.ac.uk
[86400] 50.16.215.129.in-addr.arpa. domain name pointer hecate.is.ed.ac.uk
[86400] 51.16.215.129.in-addr.arpa. domain name pointer orpheus.is.ed.ac.uk
[86400] 52.16.215.129.in-addr.arpa. domain name pointer spacewalk.is.ed.ac.uk
[86400] 53.16.215.129.in-addr.arpa. domain name pointer vpn.iti-unix.is.ed.ac.uk
[0] 54.16.215.129.in-addr.arpa.: domain name does not exist
[0] 55.16.215.129.in-addr.arpa.: domain name does not exist
[86400] 56.16.215.129.in-addr.arpa. domain name pointer lac-repo-test13.is.ed.ac.uk
[86400] 57.16.215.129.in-addr.arpa. domain name pointer lac-repo-live13.is.ed.ac.uk
[86400] 58.16.215.129.in-addr.arpa. domain name pointer lac-repo-test14.is.ed.ac.uk
[86400] 59.16.215.129.in-addr.arpa. domain name pointer lac-repo-live14.is.ed.ac.uk
[86400] 60.16.215.129.in-addr.arpa. domain name pointer aridhia01.ecdf.ed.ac.uk
[86400] 61.16.215.129.in-addr.arpa. domain name pointer nas-sandbox-at2.is.ed.ac.uk
[86400] 62.16.215.129.in-addr.arpa. domain name pointer ug-centos7-2.is.ed.ac.uk
[86400] 63.16.215.129.in-addr.arpa. domain name pointer lac-repo-test15.is.ed.ac.uk
[86400] 64.16.215.129.in-addr.arpa. domain name pointer lac-repo-live15.is.ed.ac.uk
[86400] 65.16.215.129.in-addr.arpa. domain name pointer www.multiporttest.is.ed.ac.uk
[86400] 66.16.215.129.in-addr.arpa. domain name pointer lac-luna-live5.is.ed.ac.uk
[86400] 67.16.215.129.in-addr.arpa. domain name pointer centos7-standard.is.ed.ac.uk
[0] 68.16.215.129.in-addr.arpa.: domain name does not exist
[0] 69.16.215.129.in-addr.arpa.: domain name does not exist
[86400] 70.16.215.129.in-addr.arpa. domain name pointer salt.is.ed.ac.uk
[86400] 71.16.215.129.in-addr.arpa. domain name pointer lac-repo-test16.is.ed.ac.uk
[86400] 72.16.215.129.in-addr.arpa. domain name pointer lac-repo-live16.is.ed.ac.uk
[86400] 73.16.215.129.in-addr.arpa. domain name pointer lac-repo-test17.is.ed.ac.uk
[86400] 74.16.215.129.in-addr.arpa. domain name pointer lac-repo-live17.is.ed.ac.uk
[86400] 75.16.215.129.in-addr.arpa. domain name pointer lac-repo-test18.is.ed.ac.uk
[86400] 76.16.215.129.in-addr.arpa. domain name pointer lac-repo-live18.is.ed.ac.uk
[86400] 77.16.215.129.in-addr.arpa. domain name pointer lac-repo-test19.is.ed.ac.uk
[0] 78.16.215.129.in-addr.arpa.: domain name does not exist
[86400] 79.16.215.129.in-addr.arpa. domain name pointer lac-almasftp.is.ed.ac.uk
[86400] 80.16.215.129.in-addr.arpa. domain name pointer profile1.is.ed.ac.uk
[86400] 81.16.215.129.in-addr.arpa. domain name pointer profile2.is.ed.ac.uk
[86400] 82.16.215.129.in-addr.arpa. domain name pointer profile3.is.ed.ac.uk
[86400] 83.16.215.129.in-addr.arpa. domain name pointer lac-repo-test20.is.ed.ac.uk
[86400] 84.16.215.129.in-addr.arpa. domain name pointer lac-repo-live20.is.ed.ac.uk
[86400] 85.16.215.129.in-addr.arpa. domain name pointer ug-rhel-7-1.is.ed.ac.uk
[86400] 86.16.215.129.in-addr.arpa. domain name pointer raygun.ucs.ed.ac.uk
[86400] 87.16.215.129.in-addr.arpa. domain name pointer iti-test-sp.is.ed.ac.uk
[86400] 88.16.215.129.in-addr.arpa. domain name pointer new-netscaler-vlan16-snip.is.ed.ac.uk
[86400] 89.16.215.129.in-addr.arpa. domain name pointer centos7-migration.is.ed.ac.uk
[86400] 90.16.215.129.in-addr.arpa. domain name pointer truffle.ucs.ed.ac.uk
[86400] 91.16.215.129.in-addr.arpa. domain name pointer idp3-test-1.is.ed.ac.uk
[86400] 92.16.215.129.in-addr.arpa. domain name pointer idp3-test-2.is.ed.ac.uk
[86400] 93.16.215.129.in-addr.arpa. domain name pointer kracken-use.is.ed.ac.uk
[86400] 94.16.215.129.in-addr.arpa. domain name pointer lac-repo-test21.is.ed.ac.uk
[86400] 95.16.215.129.in-addr.arpa. domain name pointer lac-repo-live21.is.ed.ac.uk
[86400] 96.16.215.129.in-addr.arpa. domain name pointer desktop-packaging.is.ed.ac.uk
[86400] 97.16.215.129.in-addr.arpa. domain name pointer git-iti.is.ed.ac.uk
[86400] 98.16.215.129.in-addr.arpa. domain name pointer test-001.is.ed.ac.uk
[86400] 99.16.215.129.in-addr.arpa. domain name pointer unix.is.ed.ac.uk
[86400] 100.16.215.129.in-addr.arpa. domain name pointer es-puppet.is.ed.ac.uk
[86400] 101.16.215.129.in-addr.arpa. domain name pointer es-puppet-db.is.ed.ac.uk
[86400] 102.16.215.129.in-addr.arpa. domain name pointer rhone.is.ed.ac.uk
[86400] 103.16.215.129.in-addr.arpa. domain name pointer praline.ucs.ed.ac.uk
[86400] 104.16.215.129.in-addr.arpa. domain name pointer spacewalk-client1.is.ed.ac.uk
[86400] 105.16.215.129.in-addr.arpa. domain name pointer spacewalk-client2.is.ed.ac.uk
[86400] 106.16.215.129.in-addr.arpa. domain name pointer marzipan.ucs.ed.ac.uk
[86400] 107.16.215.129.in-addr.arpa. domain name pointer sporadic-temp.is.ed.ac.uk
[86400] 108.16.215.129.in-addr.arpa. domain name pointer spacewalk-client3.is.ed.ac.uk
[86400] 109.16.215.129.in-addr.arpa. domain name pointer spacewalk-client4.is.ed.ac.uk
[86400] 110.16.215.129.in-addr.arpa. domain name pointer spacewalk-client5.is.ed.ac.uk
[86400] 111.16.215.129.in-addr.arpa. domain name pointer spacewalk-client6.is.ed.ac.uk
[86400] 112.16.215.129.in-addr.arpa. domain name pointer spacewalk-client7.is.ed.ac.uk
[86400] 113.16.215.129.in-addr.arpa. domain name pointer spacewalk-client8.is.ed.ac.uk
[86400] 114.16.215.129.in-addr.arpa. domain name pointer spacewalk-clone.is.ed.ac.uk
[86400] 115.16.215.129.in-addr.arpa. domain name pointer cauth01.authorise.is.ed.ac.uk
[86400] 116.16.215.129.in-addr.arpa. domain name pointer cauth02.authorise.is.ed.ac.uk
[86400] 117.16.215.129.in-addr.arpa. domain name pointer cauth03.authorise.is.ed.ac.uk
[86400] 118.16.215.129.in-addr.arpa. domain name pointer cauth04.authorise.is.ed.ac.uk
[86400] 119.16.215.129.in-addr.arpa. domain name pointer es-puppet-db-restored.is.ed.ac.uk
[86400] 120.16.215.129.in-addr.arpa. domain name pointer lac-lddt-test.is.ed.ac.uk
[86400] 121.16.215.129.in-addr.arpa. domain name pointer lac-sdlc-rgu-test.is.ed.ac.uk
[86400] 122.16.215.129.in-addr.arpa. domain name pointer lac-archivematica-live1.is.ed.ac.uk
[86400] 123.16.215.129.in-addr.arpa. domain name pointer athena.is.ed.ac.uk
[86400] 124.16.215.129.in-addr.arpa. domain name pointer hera.is.ed.ac.uk
[86400] 125.16.215.129.in-addr.arpa. domain name pointer netscaler-vpx-snip-vlan16.is.ed.ac.uk
[86400] 126.16.215.129.in-addr.arpa. domain name pointer lac-node-test1.is.ed.ac.uk
[86400] 127.16.215.129.in-addr.arpa. domain name pointer radius03.is.ed.ac.uk
[86400] 128.16.215.129.in-addr.arpa. domain name pointer radius04.is.ed.ac.uk
[86400] 129.16.215.129.in-addr.arpa. domain name pointer radius01.is.ed.ac.uk
[86400] 130.16.215.129.in-addr.arpa. domain name pointer radius02.is.ed.ac.uk
[86400] 131.16.215.129.in-addr.arpa. domain name pointer lac-node-live1.is.ed.ac.uk
[86400] 132.16.215.129.in-addr.arpa. domain name pointer lac-sdlc-rgu-live.is.ed.ac.uk
[86400] 133.16.215.129.in-addr.arpa. domain name pointer iti029.is.ed.ac.uk
[86400] 134.16.215.129.in-addr.arpa. domain name pointer gitlab-puppet-mirror.is.ed.ac.uk
[86400] 135.16.215.129.in-addr.arpa. domain name pointer lac-sdlc-sta-test.is.ed.ac.uk
[86400] 136.16.215.129.in-addr.arpa. domain name pointer lac-lockss-live1.is.ed.ac.uk
[86400] 137.16.215.129.in-addr.arpa. domain name pointer gitlab-runner-01.is.ed.ac.uk
[86400] 138.16.215.129.in-addr.arpa. domain name pointer mudir.is.ed.ac.uk
[86400] 139.16.215.129.in-addr.arpa. domain name pointer nadir.is.ed.ac.uk
[86400] 140.16.215.129.in-addr.arpa. domain name pointer lac-php-test3.is.ed.ac.uk
[86400] 141.16.215.129.in-addr.arpa. domain name pointer nodir.is.ed.ac.uk
[86400] 142.16.215.129.in-addr.arpa. domain name pointer nios-test.is.ed.ac.uk
[86400] 143.16.215.129.in-addr.arpa. domain name pointer magnet.is.ed.ac.uk
[0] 144.16.215.129.in-addr.arpa.: domain name does not exist
[0] 145.16.215.129.in-addr.arpa.: domain name does not exist
[0] 146.16.215.129.in-addr.arpa.: domain name does not exist
[86400] 147.16.215.129.in-addr.arpa. domain name pointer lac-sdlc-hwu-test.is.ed.ac.uk
[86400] 148.16.215.129.in-addr.arpa. domain name pointer lac-collman-test.is.ed.ac.uk
[86400] 149.16.215.129.in-addr.arpa. domain name pointer dec-vm.ease.ed.ac.uk
[86400] 150.16.215.129.in-addr.arpa. domain name pointer mal-vm.ease.ed.ac.uk
[86400] 151.16.215.129.in-addr.arpa. domain name pointer def-vm.ease.ed.ac.uk
[86400] 152.16.215.129.in-addr.arpa. domain name pointer rel-vm.ease.ed.ac.uk
[86400] 153.16.215.129.in-addr.arpa. domain name pointer lac-sdlc-qmu-test.is.ed.ac.uk
[86400] 154.16.215.129.in-addr.arpa. domain name pointer lac-sdlc-hwu-live.is.ed.ac.uk
[86400] 155.16.215.129.in-addr.arpa. domain name pointer maildir-test-1.is.ed.ac.uk
[86400] 156.16.215.129.in-addr.arpa. domain name pointer maildir-test-2.is.ed.ac.uk
[86400] 157.16.215.129.in-addr.arpa. domain name pointer lac-sdlc-qmu-live.is.ed.ac.uk
[86400] 158.16.215.129.in-addr.arpa. domain name pointer vcsa-backup.is.ed.ac.uk
[86400] 159.16.215.129.in-addr.arpa. domain name pointer mlist3.is.ed.ac.uk
[0] 160.16.215.129.in-addr.arpa.: domain name does not exist
[0] 161.16.215.129.in-addr.arpa.: domain name does not exist
[0] 162.16.215.129.in-addr.arpa.: domain name does not exist
[0] 163.16.215.129.in-addr.arpa.: domain name does not exist
[0] 164.16.215.129.in-addr.arpa.: domain name does not exist
[0] 165.16.215.129.in-addr.arpa.: domain name does not exist
[0] 166.16.215.129.in-addr.arpa.: domain name does not exist
[0] 167.16.215.129.in-addr.arpa.: domain name does not exist
[0] 168.16.215.129.in-addr.arpa.: domain name does not exist
[0] 169.16.215.129.in-addr.arpa.: domain name does not exist
[0] 170.16.215.129.in-addr.arpa.: domain name does not exist
[0] 171.16.215.129.in-addr.arpa.: domain name does not exist
[0] 172.16.215.129.in-addr.arpa.: domain name does not exist
[0] 173.16.215.129.in-addr.arpa.: domain name does not exist
[0] 174.16.215.129.in-addr.arpa.: domain name does not exist
[0] 175.16.215.129.in-addr.arpa.: domain name does not exist
[0] 176.16.215.129.in-addr.arpa.: domain name does not exist
[0] 177.16.215.129.in-addr.arpa.: domain name does not exist
[0] 178.16.215.129.in-addr.arpa.: domain name does not exist
[0] 179.16.215.129.in-addr.arpa.: domain name does not exist
[0] 180.16.215.129.in-addr.arpa.: domain name does not exist
[0] 181.16.215.129.in-addr.arpa.: domain name does not exist
[0] 182.16.215.129.in-addr.arpa.: domain name does not exist
[0] 183.16.215.129.in-addr.arpa.: domain name does not exist
[0] 184.16.215.129.in-addr.arpa.: domain name does not exist
[0] 185.16.215.129.in-addr.arpa.: domain name does not exist
[0] 186.16.215.129.in-addr.arpa.: domain name does not exist
[0] 187.16.215.129.in-addr.arpa.: domain name does not exist
[0] 188.16.215.129.in-addr.arpa.: domain name does not exist
[0] 189.16.215.129.in-addr.arpa.: domain name does not exist
[0] 190.16.215.129.in-addr.arpa.: domain name does not exist
[0] 191.16.215.129.in-addr.arpa.: domain name does not exist
[0] 192.16.215.129.in-addr.arpa.: domain name does not exist
[0] 193.16.215.129.in-addr.arpa.: domain name does not exist
[0] 194.16.215.129.in-addr.arpa.: domain name does not exist
[0] 195.16.215.129.in-addr.arpa.: domain name does not exist
[0] 196.16.215.129.in-addr.arpa.: domain name does not exist
[0] 197.16.215.129.in-addr.arpa.: domain name does not exist
[0] 198.16.215.129.in-addr.arpa.: domain name does not exist
[0] 199.16.215.129.in-addr.arpa.: domain name does not exist
[86400] 200.16.215.129.in-addr.arpa. domain name pointer centos-migration-lib6.is.ed.ac.uk
[86400] 201.16.215.129.in-addr.arpa. domain name pointer centos-migration-uws6.is.ed.ac.uk
[0] 202.16.215.129.in-addr.arpa.: domain name does not exist
[86400] 203.16.215.129.in-addr.arpa. domain name pointer centos-migration-5-32.is.ed.ac.uk
[86400] 204.16.215.129.in-addr.arpa. domain name pointer centos-migration-6-32.is.ed.ac.uk
[86400] 205.16.215.129.in-addr.arpa. domain name pointer centos-migration-5.is.ed.ac.uk
[86400] 206.16.215.129.in-addr.arpa. domain name pointer centos-migration-6.is.ed.ac.uk
[86400] 207.16.215.129.in-addr.arpa. domain name pointer centos-migration-7.is.ed.ac.uk
[0] 208.16.215.129.in-addr.arpa.: domain name does not exist
[0] 209.16.215.129.in-addr.arpa.: domain name does not exist
[0] 210.16.215.129.in-addr.arpa.: domain name does not exist
[0] 211.16.215.129.in-addr.arpa.: domain name does not exist
[0] 212.16.215.129.in-addr.arpa.: domain name does not exist
[0] 213.16.215.129.in-addr.arpa.: domain name does not exist
[0] 214.16.215.129.in-addr.arpa.: domain name does not exist
[0] 215.16.215.129.in-addr.arpa.: domain name does not exist
[0] 216.16.215.129.in-addr.arpa.: domain name does not exist
[0] 217.16.215.129.in-addr.arpa.: domain name does not exist
[0] 218.16.215.129.in-addr.arpa.: domain name does not exist
[0] 219.16.215.129.in-addr.arpa.: domain name does not exist
[0] 220.16.215.129.in-addr.arpa.: domain name does not exist
[0] 221.16.215.129.in-addr.arpa.: domain name does not exist
[0] 222.16.215.129.in-addr.arpa.: domain name does not exist
[0] 223.16.215.129.in-addr.arpa.: domain name does not exist
[0] 224.16.215.129.in-addr.arpa.: domain name does not exist
[0] 225.16.215.129.in-addr.arpa.: domain name does not exist
[0] 226.16.215.129.in-addr.arpa.: domain name does not exist
[0] 227.16.215.129.in-addr.arpa.: domain name does not exist
[0] 228.16.215.129.in-addr.arpa.: domain name does not exist
[0] 229.16.215.129.in-addr.arpa.: domain name does not exist
[0] 230.16.215.129.in-addr.arpa.: domain name does not exist
[0] 231.16.215.129.in-addr.arpa.: domain name does not exist
[0] 232.16.215.129.in-addr.arpa.: domain name does not exist
[0] 233.16.215.129.in-addr.arpa.: domain name does not exist
[0] 234.16.215.129.in-addr.arpa.: domain name does not exist
[0] 235.16.215.129.in-addr.arpa.: domain name does not exist
[0] 236.16.215.129.in-addr.arpa.: domain name does not exist
[0] 237.16.215.129.in-addr.arpa.: domain name does not exist
[0] 238.16.215.129.in-addr.arpa.: domain name does not exist
[0] 239.16.215.129.in-addr.arpa.: domain name does not exist
[0] 240.16.215.129.in-addr.arpa.: domain name does not exist
[0] 241.16.215.129.in-addr.arpa.: domain name does not exist
[0] 242.16.215.129.in-addr.arpa.: domain name does not exist
[0] 243.16.215.129.in-addr.arpa.: domain name does not exist
[0] 244.16.215.129.in-addr.arpa.: domain name does not exist
[0] 245.16.215.129.in-addr.arpa.: domain name does not exist
[86400] 246.16.215.129.in-addr.arpa. domain name pointer flr-vlan16.is.ed.ac.uk
[86400] 247.16.215.129.in-addr.arpa. domain name pointer kickstart-vlan17.is.ed.ac.uk
[0] 248.16.215.129.in-addr.arpa.: domain name does not exist
[0] 249.16.215.129.in-addr.arpa.: domain name does not exist
[0] 250.16.215.129.in-addr.arpa.: domain name does not exist
[0] 251.16.215.129.in-addr.arpa.: domain name does not exist
[0] 252.16.215.129.in-addr.arpa.: domain name does not exist
[0] 253.16.215.129.in-addr.arpa.: domain name does not exist
[86400] 254.16.215.129.in-addr.arpa. domain name pointer vlan16.kb9.net.ed.ac.uk
[0] 255.16.215.129.in-addr.arpa.: domain name does not exist