[0] 0.24.112.203.in-addr.arpa.: domain name does not exist
[86400] 1.24.112.203.in-addr.arpa. domain name pointer r024001.203112.miinet.jp
[86400] 2.24.112.203.in-addr.arpa. domain name pointer r024002.203112.miinet.jp
[86400] 3.24.112.203.in-addr.arpa. domain name pointer r024003.203112.miinet.jp
[86400] 4.24.112.203.in-addr.arpa. domain name pointer r024004.203112.miinet.jp
[86400] 5.24.112.203.in-addr.arpa. domain name pointer r024005.203112.miinet.jp
[86400] 6.24.112.203.in-addr.arpa. domain name pointer r024006.203112.miinet.jp
[86400] 7.24.112.203.in-addr.arpa. domain name pointer r024007.203112.miinet.jp
[86400] 8.24.112.203.in-addr.arpa. domain name pointer r024008.203112.miinet.jp
[86400] 9.24.112.203.in-addr.arpa. domain name pointer r024009.203112.miinet.jp
[86400] 10.24.112.203.in-addr.arpa. domain name pointer r024010.203112.miinet.jp
[86400] 11.24.112.203.in-addr.arpa. domain name pointer r024011.203112.miinet.jp
[86400] 12.24.112.203.in-addr.arpa. domain name pointer r024012.203112.miinet.jp
[86400] 13.24.112.203.in-addr.arpa. domain name pointer r024013.203112.miinet.jp
[86400] 14.24.112.203.in-addr.arpa. domain name pointer r024014.203112.miinet.jp
[86400] 15.24.112.203.in-addr.arpa. domain name pointer r024015.203112.miinet.jp
[86400] 16.24.112.203.in-addr.arpa. domain name pointer r024016.203112.miinet.jp
[86400] 17.24.112.203.in-addr.arpa. domain name pointer r024017.203112.miinet.jp
[86400] 18.24.112.203.in-addr.arpa. domain name pointer r024018.203112.miinet.jp
[86400] 19.24.112.203.in-addr.arpa. domain name pointer r024019.203112.miinet.jp
[86400] 20.24.112.203.in-addr.arpa. domain name pointer r024020.203112.miinet.jp
[86400] 21.24.112.203.in-addr.arpa. domain name pointer r024021.203112.miinet.jp
[86400] 22.24.112.203.in-addr.arpa. domain name pointer r024022.203112.miinet.jp
[86400] 23.24.112.203.in-addr.arpa. domain name pointer r024023.203112.miinet.jp
[86400] 24.24.112.203.in-addr.arpa. domain name pointer r024024.203112.miinet.jp
[86400] 25.24.112.203.in-addr.arpa. domain name pointer r024025.203112.miinet.jp
[86400] 26.24.112.203.in-addr.arpa. domain name pointer r024026.203112.miinet.jp
[86400] 27.24.112.203.in-addr.arpa. domain name pointer r024027.203112.miinet.jp
[86400] 28.24.112.203.in-addr.arpa. domain name pointer r024028.203112.miinet.jp
[86400] 29.24.112.203.in-addr.arpa. domain name pointer r024029.203112.miinet.jp
[86400] 30.24.112.203.in-addr.arpa. domain name pointer r024030.203112.miinet.jp
[86400] 31.24.112.203.in-addr.arpa. domain name pointer r024031.203112.miinet.jp
[0] 32.24.112.203.in-addr.arpa.: domain name does not exist
[0] 33.24.112.203.in-addr.arpa.: domain name does not exist
[0] 34.24.112.203.in-addr.arpa.: domain name does not exist
[0] 35.24.112.203.in-addr.arpa.: domain name does not exist
[0] 36.24.112.203.in-addr.arpa.: domain name does not exist
[0] 37.24.112.203.in-addr.arpa.: domain name does not exist
[0] 38.24.112.203.in-addr.arpa.: domain name does not exist
[0] 39.24.112.203.in-addr.arpa.: domain name does not exist
[86400] 40.24.112.203.in-addr.arpa. domain name pointer r024040.203112.miinet.jp
[86400] 41.24.112.203.in-addr.arpa. domain name pointer r024041.203112.miinet.jp
[86400] 42.24.112.203.in-addr.arpa. domain name pointer r024042.203112.miinet.jp
[86400] 43.24.112.203.in-addr.arpa. domain name pointer r024043.203112.miinet.jp
[86400] 44.24.112.203.in-addr.arpa. domain name pointer r024044.203112.miinet.jp
[86400] 45.24.112.203.in-addr.arpa. domain name pointer r024045.203112.miinet.jp
[86400] 46.24.112.203.in-addr.arpa. domain name pointer r024046.203112.miinet.jp
[86400] 47.24.112.203.in-addr.arpa. domain name pointer r024047.203112.miinet.jp
[86400] 48.24.112.203.in-addr.arpa. domain name pointer r024048.203112.miinet.jp
[86400] 49.24.112.203.in-addr.arpa. domain name pointer r024049.203112.miinet.jp
[86400] 50.24.112.203.in-addr.arpa. domain name pointer r024050.203112.miinet.jp
[86400] 51.24.112.203.in-addr.arpa. domain name pointer r024051.203112.miinet.jp
[86400] 52.24.112.203.in-addr.arpa. domain name pointer r024052.203112.miinet.jp
[86400] 53.24.112.203.in-addr.arpa. domain name pointer r024053.203112.miinet.jp
[86400] 54.24.112.203.in-addr.arpa. domain name pointer r024054.203112.miinet.jp
[86400] 55.24.112.203.in-addr.arpa. domain name pointer r024055.203112.miinet.jp
[0] 56.24.112.203.in-addr.arpa.: domain name does not exist
[0] 57.24.112.203.in-addr.arpa.: domain name does not exist
[0] 58.24.112.203.in-addr.arpa.: domain name does not exist
[0] 59.24.112.203.in-addr.arpa.: domain name does not exist
[0] 60.24.112.203.in-addr.arpa.: domain name does not exist
[0] 61.24.112.203.in-addr.arpa.: domain name does not exist
[0] 62.24.112.203.in-addr.arpa.: domain name does not exist
[0] 63.24.112.203.in-addr.arpa.: domain name does not exist
[86400] 64.24.112.203.in-addr.arpa. domain name pointer r024064.203112.miinet.jp
[86400] 65.24.112.203.in-addr.arpa. domain name pointer r024065.203112.miinet.jp
[86400] 66.24.112.203.in-addr.arpa. domain name pointer r024066.203112.miinet.jp
[86400] 67.24.112.203.in-addr.arpa. domain name pointer r024067.203112.miinet.jp
[86400] 68.24.112.203.in-addr.arpa. domain name pointer r024068.203112.miinet.jp
[86400] 69.24.112.203.in-addr.arpa. domain name pointer r024069.203112.miinet.jp
[86400] 70.24.112.203.in-addr.arpa. domain name pointer r024070.203112.miinet.jp
[86400] 71.24.112.203.in-addr.arpa. domain name pointer r024071.203112.miinet.jp
[86400] 72.24.112.203.in-addr.arpa. domain name pointer r024072.203112.miinet.jp
[86400] 73.24.112.203.in-addr.arpa. domain name pointer r024073.203112.miinet.jp
[86400] 74.24.112.203.in-addr.arpa. domain name pointer r024074.203112.miinet.jp
[86400] 75.24.112.203.in-addr.arpa. domain name pointer r024075.203112.miinet.jp
[86400] 76.24.112.203.in-addr.arpa. domain name pointer r024076.203112.miinet.jp
[86400] 77.24.112.203.in-addr.arpa. domain name pointer r024077.203112.miinet.jp
[86400] 78.24.112.203.in-addr.arpa. domain name pointer r024078.203112.miinet.jp
[86400] 79.24.112.203.in-addr.arpa. domain name pointer r024079.203112.miinet.jp
[86400] 80.24.112.203.in-addr.arpa. domain name pointer r024080.203112.miinet.jp
[86400] 81.24.112.203.in-addr.arpa. domain name pointer r024081.203112.miinet.jp
[86400] 82.24.112.203.in-addr.arpa. domain name pointer r024082.203112.miinet.jp
[86400] 83.24.112.203.in-addr.arpa. domain name pointer r024083.203112.miinet.jp
[86400] 84.24.112.203.in-addr.arpa. domain name pointer r024084.203112.miinet.jp
[86400] 85.24.112.203.in-addr.arpa. domain name pointer r024085.203112.miinet.jp
[86400] 86.24.112.203.in-addr.arpa. domain name pointer r024086.203112.miinet.jp
[86400] 87.24.112.203.in-addr.arpa. domain name pointer r024087.203112.miinet.jp
[86400] 88.24.112.203.in-addr.arpa. domain name pointer r024088.203112.miinet.jp
[86400] 89.24.112.203.in-addr.arpa. domain name pointer r024089.203112.miinet.jp
[86400] 90.24.112.203.in-addr.arpa. domain name pointer r024090.203112.miinet.jp
[86400] 91.24.112.203.in-addr.arpa. domain name pointer r024091.203112.miinet.jp
[86400] 92.24.112.203.in-addr.arpa. domain name pointer r024092.203112.miinet.jp
[86400] 93.24.112.203.in-addr.arpa. domain name pointer r024093.203112.miinet.jp
[86400] 94.24.112.203.in-addr.arpa. domain name pointer r024094.203112.miinet.jp
[86400] 95.24.112.203.in-addr.arpa. domain name pointer r024095.203112.miinet.jp
[86400] 96.24.112.203.in-addr.arpa. domain name pointer r024096.203112.miinet.jp
[86400] 97.24.112.203.in-addr.arpa. domain name pointer r024097.203112.miinet.jp
[86400] 98.24.112.203.in-addr.arpa. domain name pointer r024098.203112.miinet.jp
[86400] 99.24.112.203.in-addr.arpa. domain name pointer r024099.203112.miinet.jp
[86400] 100.24.112.203.in-addr.arpa. domain name pointer r024100.203112.miinet.jp
[86400] 101.24.112.203.in-addr.arpa. domain name pointer r024101.203112.miinet.jp
[86400] 102.24.112.203.in-addr.arpa. domain name pointer r024102.203112.miinet.jp
[86400] 103.24.112.203.in-addr.arpa. domain name pointer r024103.203112.miinet.jp
[86400] 104.24.112.203.in-addr.arpa. domain name pointer r024104.203112.miinet.jp
[86400] 105.24.112.203.in-addr.arpa. domain name pointer r024105.203112.miinet.jp
[86400] 106.24.112.203.in-addr.arpa. domain name pointer r024106.203112.miinet.jp
[86400] 107.24.112.203.in-addr.arpa. domain name pointer r024107.203112.miinet.jp
[86400] 108.24.112.203.in-addr.arpa. domain name pointer r024108.203112.miinet.jp
[86400] 109.24.112.203.in-addr.arpa. domain name pointer r024109.203112.miinet.jp
[86400] 110.24.112.203.in-addr.arpa. domain name pointer r024110.203112.miinet.jp
[86400] 111.24.112.203.in-addr.arpa. domain name pointer r024111.203112.miinet.jp
[86400] 112.24.112.203.in-addr.arpa. domain name pointer r024112.203112.miinet.jp
[86400] 113.24.112.203.in-addr.arpa. domain name pointer r024113.203112.miinet.jp
[86400] 114.24.112.203.in-addr.arpa. domain name pointer r024114.203112.miinet.jp
[86400] 115.24.112.203.in-addr.arpa. domain name pointer r024115.203112.miinet.jp
[86400] 116.24.112.203.in-addr.arpa. domain name pointer r024116.203112.miinet.jp
[86400] 117.24.112.203.in-addr.arpa. domain name pointer r024117.203112.miinet.jp
[86400] 118.24.112.203.in-addr.arpa. domain name pointer r024118.203112.miinet.jp
[86400] 119.24.112.203.in-addr.arpa. domain name pointer r024119.203112.miinet.jp
[86400] 120.24.112.203.in-addr.arpa. domain name pointer r024120.203112.miinet.jp
[86400] 121.24.112.203.in-addr.arpa. domain name pointer r024121.203112.miinet.jp
[86400] 122.24.112.203.in-addr.arpa. domain name pointer r024122.203112.miinet.jp
[86400] 123.24.112.203.in-addr.arpa. domain name pointer r024123.203112.miinet.jp
[86400] 124.24.112.203.in-addr.arpa. domain name pointer r024124.203112.miinet.jp
[86400] 125.24.112.203.in-addr.arpa. domain name pointer r024125.203112.miinet.jp
[86400] 126.24.112.203.in-addr.arpa. domain name pointer r024126.203112.miinet.jp
[86400] 127.24.112.203.in-addr.arpa. domain name pointer r024127.203112.miinet.jp
[0] 128.24.112.203.in-addr.arpa.: temporary failure in name resolution
[0] 129.24.112.203.in-addr.arpa.: valid domain but no data of requested type
[0] 130.24.112.203.in-addr.arpa.: valid domain but no data of requested type
[0] 131.24.112.203.in-addr.arpa.: valid domain but no data of requested type
[0] 132.24.112.203.in-addr.arpa.: valid domain but no data of requested type
[0] 133.24.112.203.in-addr.arpa.: valid domain but no data of requested type
[0] 134.24.112.203.in-addr.arpa.: valid domain but no data of requested type
[0] 135.24.112.203.in-addr.arpa.: valid domain but no data of requested type
[0] 136.24.112.203.in-addr.arpa.: valid domain but no data of requested type
[0] 137.24.112.203.in-addr.arpa.: valid domain but no data of requested type
[0] 138.24.112.203.in-addr.arpa.: valid domain but no data of requested type
[0] 139.24.112.203.in-addr.arpa.: valid domain but no data of requested type
[0] 140.24.112.203.in-addr.arpa.: valid domain but no data of requested type
[0] 141.24.112.203.in-addr.arpa.: valid domain but no data of requested type
[0] 142.24.112.203.in-addr.arpa.: valid domain but no data of requested type
[0] 143.24.112.203.in-addr.arpa.: domain name does not exist
[86400] 144.24.112.203.in-addr.arpa. domain name pointer r024144.203112.miinet.jp
[86400] 145.24.112.203.in-addr.arpa. domain name pointer r024145.203112.miinet.jp
[86400] 146.24.112.203.in-addr.arpa. domain name pointer r024146.203112.miinet.jp
[86400] 147.24.112.203.in-addr.arpa. domain name pointer r024147.203112.miinet.jp
[86400] 148.24.112.203.in-addr.arpa. domain name pointer r024148.203112.miinet.jp
[86400] 149.24.112.203.in-addr.arpa. domain name pointer r024149.203112.miinet.jp
[86400] 150.24.112.203.in-addr.arpa. domain name pointer r024150.203112.miinet.jp
[86400] 151.24.112.203.in-addr.arpa. domain name pointer r024151.203112.miinet.jp
[86400] 152.24.112.203.in-addr.arpa. domain name pointer r024152.203112.miinet.jp
[86400] 153.24.112.203.in-addr.arpa. domain name pointer r024153.203112.miinet.jp
[86400] 154.24.112.203.in-addr.arpa. domain name pointer r024154.203112.miinet.jp
[86400] 155.24.112.203.in-addr.arpa. domain name pointer r024155.203112.miinet.jp
[86400] 156.24.112.203.in-addr.arpa. domain name pointer r024156.203112.miinet.jp
[86400] 157.24.112.203.in-addr.arpa. domain name pointer r024157.203112.miinet.jp
[86400] 158.24.112.203.in-addr.arpa. domain name pointer r024158.203112.miinet.jp
[86400] 159.24.112.203.in-addr.arpa. domain name pointer r024159.203112.miinet.jp
[86400] 160.24.112.203.in-addr.arpa. domain name pointer r024160.203112.miinet.jp
[86400] 161.24.112.203.in-addr.arpa. domain name pointer r024161.203112.miinet.jp
[86400] 162.24.112.203.in-addr.arpa. domain name pointer r024162.203112.miinet.jp
[86400] 163.24.112.203.in-addr.arpa. domain name pointer r024163.203112.miinet.jp
[86400] 164.24.112.203.in-addr.arpa. domain name pointer r024164.203112.miinet.jp
[86400] 165.24.112.203.in-addr.arpa. domain name pointer r024165.203112.miinet.jp
[86400] 166.24.112.203.in-addr.arpa. domain name pointer r024166.203112.miinet.jp
[86400] 167.24.112.203.in-addr.arpa. domain name pointer r024167.203112.miinet.jp
[86400] 168.24.112.203.in-addr.arpa. domain name pointer r024168.203112.miinet.jp
[86400] 169.24.112.203.in-addr.arpa. domain name pointer r024169.203112.miinet.jp
[86400] 170.24.112.203.in-addr.arpa. domain name pointer r024170.203112.miinet.jp
[86400] 171.24.112.203.in-addr.arpa. domain name pointer r024171.203112.miinet.jp
[86400] 172.24.112.203.in-addr.arpa. domain name pointer r024172.203112.miinet.jp
[86400] 173.24.112.203.in-addr.arpa. domain name pointer r024173.203112.miinet.jp
[86400] 174.24.112.203.in-addr.arpa. domain name pointer r024174.203112.miinet.jp
[86400] 175.24.112.203.in-addr.arpa. domain name pointer r024175.203112.miinet.jp
[86400] 176.24.112.203.in-addr.arpa. domain name pointer r024176.203112.miinet.jp
[86400] 177.24.112.203.in-addr.arpa. domain name pointer r024177.203112.miinet.jp
[86400] 178.24.112.203.in-addr.arpa. domain name pointer r024178.203112.miinet.jp
[86400] 179.24.112.203.in-addr.arpa. domain name pointer r024179.203112.miinet.jp
[86400] 180.24.112.203.in-addr.arpa. domain name pointer r024180.203112.miinet.jp
[86400] 181.24.112.203.in-addr.arpa. domain name pointer r024181.203112.miinet.jp
[86400] 182.24.112.203.in-addr.arpa. domain name pointer r024182.203112.miinet.jp
[86400] 183.24.112.203.in-addr.arpa. domain name pointer r024183.203112.miinet.jp
[86400] 184.24.112.203.in-addr.arpa. domain name pointer r024184.203112.miinet.jp
[86400] 185.24.112.203.in-addr.arpa. domain name pointer r024185.203112.miinet.jp
[86400] 186.24.112.203.in-addr.arpa. domain name pointer r024186.203112.miinet.jp
[86400] 187.24.112.203.in-addr.arpa. domain name pointer r024187.203112.miinet.jp
[86400] 188.24.112.203.in-addr.arpa. domain name pointer r024188.203112.miinet.jp
[86400] 189.24.112.203.in-addr.arpa. domain name pointer r024189.203112.miinet.jp
[86400] 190.24.112.203.in-addr.arpa. domain name pointer r024190.203112.miinet.jp
[0] 191.24.112.203.in-addr.arpa.: domain name does not exist
[0] 192.24.112.203.in-addr.arpa.: valid domain but no data of requested type
[0] 193.24.112.203.in-addr.arpa.: valid domain but no data of requested type
[86400] 194.24.112.203.in-addr.arpa. domain name pointer firewall.seiwapat.co.jp
[86400] 195.24.112.203.in-addr.arpa. domain name pointer ms.seiwapat.co.jp
[0] 196.24.112.203.in-addr.arpa.: valid domain but no data of requested type
[86400] 197.24.112.203.in-addr.arpa. domain name pointer ns1.seiwapat.co.jp
[86400] 198.24.112.203.in-addr.arpa. domain name pointer ns2.seiwapat.co.jp
[0] 199.24.112.203.in-addr.arpa.: valid domain but no data of requested type
[86400] 200.24.112.203.in-addr.arpa. domain name pointer r024200.203112.miinet.jp
[86400] 201.24.112.203.in-addr.arpa. domain name pointer r024201.203112.miinet.jp
[86400] 202.24.112.203.in-addr.arpa. domain name pointer r024202.203112.miinet.jp
[86400] 203.24.112.203.in-addr.arpa. domain name pointer r024203.203112.miinet.jp
[86400] 204.24.112.203.in-addr.arpa. domain name pointer r024204.203112.miinet.jp
[86400] 205.24.112.203.in-addr.arpa. domain name pointer r024205.203112.miinet.jp
[86400] 206.24.112.203.in-addr.arpa. domain name pointer r024206.203112.miinet.jp
[86400] 207.24.112.203.in-addr.arpa. domain name pointer r024207.203112.miinet.jp
[86400] 208.24.112.203.in-addr.arpa. domain name pointer r024208.203112.miinet.jp
[86400] 209.24.112.203.in-addr.arpa. domain name pointer r024209.203112.miinet.jp
[86400] 210.24.112.203.in-addr.arpa. domain name pointer r024210.203112.miinet.jp
[86400] 211.24.112.203.in-addr.arpa. domain name pointer r024211.203112.miinet.jp
[86400] 212.24.112.203.in-addr.arpa. domain name pointer r024212.203112.miinet.jp
[86400] 213.24.112.203.in-addr.arpa. domain name pointer r024213.203112.miinet.jp
[86400] 214.24.112.203.in-addr.arpa. domain name pointer r024214.203112.miinet.jp
[86400] 215.24.112.203.in-addr.arpa. domain name pointer r024215.203112.miinet.jp
[0] 216.24.112.203.in-addr.arpa.: domain name does not exist
[0] 217.24.112.203.in-addr.arpa.: domain name does not exist
[0] 218.24.112.203.in-addr.arpa.: domain name does not exist
[0] 219.24.112.203.in-addr.arpa.: domain name does not exist
[0] 220.24.112.203.in-addr.arpa.: domain name does not exist
[0] 221.24.112.203.in-addr.arpa.: domain name does not exist
[0] 222.24.112.203.in-addr.arpa.: domain name does not exist
[0] 223.24.112.203.in-addr.arpa.: domain name does not exist
[0] 224.24.112.203.in-addr.arpa.: domain name does not exist
[0] 225.24.112.203.in-addr.arpa.: domain name does not exist
[86400] 226.24.112.203.in-addr.arpa. domain name pointer r024226.203112.miinet.jp
[86400] 227.24.112.203.in-addr.arpa. domain name pointer r024227.203112.miinet.jp
[86400] 228.24.112.203.in-addr.arpa. domain name pointer r024228.203112.miinet.jp
[86400] 229.24.112.203.in-addr.arpa. domain name pointer r024229.203112.miinet.jp
[86400] 230.24.112.203.in-addr.arpa. domain name pointer r024230.203112.miinet.jp
[86400] 231.24.112.203.in-addr.arpa. domain name pointer r024231.203112.miinet.jp
[86400] 232.24.112.203.in-addr.arpa. domain name pointer r024232.203112.miinet.jp
[86400] 233.24.112.203.in-addr.arpa. domain name pointer r024233.203112.miinet.jp
[86400] 234.24.112.203.in-addr.arpa. domain name pointer r024234.203112.miinet.jp
[86400] 235.24.112.203.in-addr.arpa. domain name pointer r024235.203112.miinet.jp
[86400] 236.24.112.203.in-addr.arpa. domain name pointer r024236.203112.miinet.jp
[86400] 237.24.112.203.in-addr.arpa. domain name pointer r024237.203112.miinet.jp
[86400] 238.24.112.203.in-addr.arpa. domain name pointer r024238.203112.miinet.jp
[86400] 239.24.112.203.in-addr.arpa. domain name pointer r024239.203112.miinet.jp
[86400] 240.24.112.203.in-addr.arpa. domain name pointer r024240.203112.miinet.jp
[86400] 241.24.112.203.in-addr.arpa. domain name pointer r024241.203112.miinet.jp
[86400] 242.24.112.203.in-addr.arpa. domain name pointer r024242.203112.miinet.jp
[86400] 243.24.112.203.in-addr.arpa. domain name pointer r024243.203112.miinet.jp
[86400] 244.24.112.203.in-addr.arpa. domain name pointer r024244.203112.miinet.jp
[86400] 245.24.112.203.in-addr.arpa. domain name pointer r024245.203112.miinet.jp
[86400] 246.24.112.203.in-addr.arpa. domain name pointer r024246.203112.miinet.jp
[86400] 247.24.112.203.in-addr.arpa. domain name pointer r024247.203112.miinet.jp
[86400] 248.24.112.203.in-addr.arpa. domain name pointer r024248.203112.miinet.jp
[86400] 249.24.112.203.in-addr.arpa. domain name pointer r024249.203112.miinet.jp
[86400] 250.24.112.203.in-addr.arpa. domain name pointer r024250.203112.miinet.jp
[86400] 251.24.112.203.in-addr.arpa. domain name pointer r024251.203112.miinet.jp
[86400] 252.24.112.203.in-addr.arpa. domain name pointer r024252.203112.miinet.jp
[86400] 253.24.112.203.in-addr.arpa. domain name pointer r024253.203112.miinet.jp
[86400] 254.24.112.203.in-addr.arpa. domain name pointer r024254.203112.miinet.jp
[0] 255.24.112.203.in-addr.arpa.: domain name does not exist