[86400] 0.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-0.easynet.de
[86400] 1.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-1.easynet.de
[86400] 2.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-2.easynet.de
[86400] 3.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-3.easynet.de
[86400] 4.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-4.easynet.de
[86400] 5.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-5.easynet.de
[86400] 6.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-6.easynet.de
[86400] 7.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-7.easynet.de
[86400] 8.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-8.easynet.de
[86400] 9.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-9.easynet.de
[86400] 10.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-10.easynet.de
[86400] 11.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-11.easynet.de
[86400] 12.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-12.easynet.de
[86400] 13.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-13.easynet.de
[86400] 14.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-14.easynet.de
[86400] 15.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-15.easynet.de
[86400] 16.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-16.easynet.de
[86400] 17.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-17.easynet.de
[86400] 18.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-18.easynet.de
[86400] 19.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-19.easynet.de
[86400] 20.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-20.easynet.de
[86400] 21.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-21.easynet.de
[86400] 22.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-22.easynet.de
[86400] 23.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-23.easynet.de
[86400] 24.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-24.easynet.de
[86400] 25.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-25.easynet.de
[86400] 26.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-26.easynet.de
[86400] 27.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-27.easynet.de
[86400] 28.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-28.easynet.de
[86400] 29.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-29.easynet.de
[86400] 30.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-30.easynet.de
[86400] 31.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-31.easynet.de
[86400] 32.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-32.easynet.de
[86400] 33.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-33.easynet.de
[86400] 34.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-34.easynet.de
[86400] 35.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-35.easynet.de
[86400] 36.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-36.easynet.de
[86400] 37.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-37.easynet.de
[86400] 38.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-38.easynet.de
[86400] 39.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-39.easynet.de
[86400] 40.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-40.easynet.de
[86400] 41.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-41.easynet.de
[86400] 42.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-42.easynet.de
[86400] 43.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-43.easynet.de
[86400] 44.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-44.easynet.de
[86400] 45.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-45.easynet.de
[86400] 46.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-46.easynet.de
[86400] 47.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-47.easynet.de
[86400] 48.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-48.easynet.de
[86400] 49.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-49.easynet.de
[86400] 50.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-50.easynet.de
[86400] 51.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-51.easynet.de
[86400] 52.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-52.easynet.de
[86400] 53.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-53.easynet.de
[86400] 54.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-54.easynet.de
[86400] 55.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-55.easynet.de
[86400] 56.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-56.easynet.de
[86400] 57.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-57.easynet.de
[86400] 58.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-58.easynet.de
[86400] 59.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-59.easynet.de
[86400] 60.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-60.easynet.de
[86400] 61.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-61.easynet.de
[86400] 62.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-62.easynet.de
[0] 63.12.177.195.in-addr.arpa.: domain name does not exist
[0] 64.12.177.195.in-addr.arpa.: domain name does not exist
[86400] 65.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-65.easynet.de
[0] 66.12.177.195.in-addr.arpa.: domain name does not exist
[0] 67.12.177.195.in-addr.arpa.: domain name does not exist
[0] 68.12.177.195.in-addr.arpa.: domain name does not exist
[0] 69.12.177.195.in-addr.arpa.: domain name does not exist
[0] 70.12.177.195.in-addr.arpa.: domain name does not exist
[0] 71.12.177.195.in-addr.arpa.: domain name does not exist
[0] 72.12.177.195.in-addr.arpa.: domain name does not exist
[0] 73.12.177.195.in-addr.arpa.: domain name does not exist
[0] 74.12.177.195.in-addr.arpa.: domain name does not exist
[0] 75.12.177.195.in-addr.arpa.: domain name does not exist
[0] 76.12.177.195.in-addr.arpa.: domain name does not exist
[0] 77.12.177.195.in-addr.arpa.: domain name does not exist
[0] 78.12.177.195.in-addr.arpa.: domain name does not exist
[0] 79.12.177.195.in-addr.arpa.: domain name does not exist
[0] 80.12.177.195.in-addr.arpa.: domain name does not exist
[86400] 81.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-81.easynet.de
[86400] 82.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-82.easynet.de
[86400] 83.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-83.easynet.de
[86400] 84.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-84.easynet.de
[86400] 85.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-85.easynet.de
[86400] 86.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-86.easynet.de
[86400] 87.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-87.easynet.de
[86400] 88.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-88.easynet.de
[86400] 89.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-89.easynet.de
[86400] 90.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-90.easynet.de
[86400] 91.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-91.easynet.de
[86400] 92.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-92.easynet.de
[86400] 93.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-93.easynet.de
[86400] 94.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-94.easynet.de
[0] 95.12.177.195.in-addr.arpa.: domain name does not exist
[86400] 96.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-96.easynet.de
[86400] 97.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-97.easynet.de
[86400] 98.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-98.easynet.de
[86400] 99.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-99.easynet.de
[86400] 100.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-100.easynet.de
[86400] 101.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-101.easynet.de
[86400] 102.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-102.easynet.de
[0] 103.12.177.195.in-addr.arpa.: domain name does not exist
[0] 104.12.177.195.in-addr.arpa.: domain name does not exist
[0] 105.12.177.195.in-addr.arpa.: domain name does not exist
[0] 106.12.177.195.in-addr.arpa.: domain name does not exist
[0] 107.12.177.195.in-addr.arpa.: domain name does not exist
[86400] 108.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-108.easynet.de
[86400] 109.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-109.easynet.de
[86400] 110.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-110.easynet.de
[0] 111.12.177.195.in-addr.arpa.: domain name does not exist
[0] 112.12.177.195.in-addr.arpa.: domain name does not exist
[0] 113.12.177.195.in-addr.arpa.: domain name does not exist
[0] 114.12.177.195.in-addr.arpa.: domain name does not exist
[0] 115.12.177.195.in-addr.arpa.: domain name does not exist
[0] 116.12.177.195.in-addr.arpa.: domain name does not exist
[0] 117.12.177.195.in-addr.arpa.: domain name does not exist
[0] 118.12.177.195.in-addr.arpa.: domain name does not exist
[0] 119.12.177.195.in-addr.arpa.: domain name does not exist
[86400] 120.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-120.easynet.de
[86400] 121.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-121.easynet.de
[86400] 122.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-122.easynet.de
[86400] 123.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-123.easynet.de
[86400] 124.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-124.easynet.de
[86400] 125.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-125.easynet.de
[86400] 126.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-126.easynet.de
[0] 127.12.177.195.in-addr.arpa.: domain name does not exist
[0] 128.12.177.195.in-addr.arpa.: domain name does not exist
[86400] 129.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-129.easynet.de
[0] 130.12.177.195.in-addr.arpa.: domain name does not exist
[0] 131.12.177.195.in-addr.arpa.: domain name does not exist
[0] 132.12.177.195.in-addr.arpa.: domain name does not exist
[0] 133.12.177.195.in-addr.arpa.: domain name does not exist
[0] 134.12.177.195.in-addr.arpa.: domain name does not exist
[0] 135.12.177.195.in-addr.arpa.: domain name does not exist
[0] 136.12.177.195.in-addr.arpa.: domain name does not exist
[86400] 137.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-137.easynet.de
[86400] 138.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-138.easynet.de
[86400] 139.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-139.easynet.de
[86400] 140.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-140.easynet.de
[86400] 141.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-141.easynet.de
[86400] 142.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-142.easynet.de
[0] 143.12.177.195.in-addr.arpa.: domain name does not exist
[86400] 144.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-144.easynet.de
[86400] 145.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-145.easynet.de
[86400] 146.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-146.easynet.de
[86400] 147.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-147.easynet.de
[86400] 148.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-148.easynet.de
[86400] 149.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-149.easynet.de
[86400] 150.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-150.easynet.de
[86400] 151.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-151.easynet.de
[86400] 152.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-152.easynet.de
[86400] 153.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-153.easynet.de
[86400] 154.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-154.easynet.de
[86400] 155.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-155.easynet.de
[86400] 156.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-156.easynet.de
[86400] 157.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-157.easynet.de
[86400] 158.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-158.easynet.de
[0] 159.12.177.195.in-addr.arpa.: domain name does not exist
[86400] 160.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-160.easynet.de
[86400] 161.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-161.easynet.de
[86400] 162.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-162.easynet.de
[86400] 163.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-163.easynet.de
[86400] 164.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-164.easynet.de
[86400] 165.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-165.easynet.de
[86400] 166.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-166.easynet.de
[0] 167.12.177.195.in-addr.arpa.: domain name does not exist
[86400] 168.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-168.easynet.de
[86400] 169.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-169.easynet.de
[86400] 170.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-170.easynet.de
[86400] 171.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-171.easynet.de
[86400] 172.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-172.easynet.de
[86400] 173.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-173.easynet.de
[86400] 174.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-174.easynet.de
[0] 175.12.177.195.in-addr.arpa.: domain name does not exist
[86400] 176.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-176.easynet.de
[86400] 177.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-177.easynet.de
[86400] 178.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-178.easynet.de
[0] 179.12.177.195.in-addr.arpa.: domain name does not exist
[86400] 180.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-180.easynet.de
[86400] 181.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-181.easynet.de
[86400] 182.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-182.easynet.de
[0] 183.12.177.195.in-addr.arpa.: domain name does not exist
[86400] 184.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-184.easynet.de
[86400] 185.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-185.easynet.de
[86400] 186.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-186.easynet.de
[86400] 187.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-187.easynet.de
[86400] 188.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-188.easynet.de
[86400] 189.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-189.easynet.de
[86400] 190.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-190.easynet.de
[0] 191.12.177.195.in-addr.arpa.: domain name does not exist
[86400] 192.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-192.easynet.de
[86400] 193.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-193.easynet.de
[86400] 194.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-194.easynet.de
[0] 195.12.177.195.in-addr.arpa.: domain name does not exist
[0] 196.12.177.195.in-addr.arpa.: domain name does not exist
[0] 197.12.177.195.in-addr.arpa.: domain name does not exist
[0] 198.12.177.195.in-addr.arpa.: domain name does not exist
[0] 199.12.177.195.in-addr.arpa.: domain name does not exist
[86400] 200.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-200.easynet.de
[86400] 201.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-201.easynet.de
[86400] 202.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-202.easynet.de
[86400] 203.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-203.easynet.de
[86400] 204.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-204.easynet.de
[86400] 205.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-205.easynet.de
[86400] 206.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-206.easynet.de
[0] 207.12.177.195.in-addr.arpa.: domain name does not exist
[86400] 208.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-208.easynet.de
[86400] 209.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-209.easynet.de
[86400] 210.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-210.easynet.de
[86400] 211.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-211.easynet.de
[86400] 212.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-212.easynet.de
[86400] 213.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-213.easynet.de
[86400] 214.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-214.easynet.de
[0] 215.12.177.195.in-addr.arpa.: domain name does not exist
[86400] 216.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-216.easynet.de
[86400] 217.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-217.easynet.de
[86400] 218.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-218.easynet.de
[86400] 219.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-219.easynet.de
[86400] 220.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-220.easynet.de
[86400] 221.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-221.easynet.de
[86400] 222.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-222.easynet.de
[0] 223.12.177.195.in-addr.arpa.: domain name does not exist
[0] 224.12.177.195.in-addr.arpa.: domain name does not exist
[0] 225.12.177.195.in-addr.arpa.: domain name does not exist
[0] 226.12.177.195.in-addr.arpa.: domain name does not exist
[0] 227.12.177.195.in-addr.arpa.: domain name does not exist
[0] 228.12.177.195.in-addr.arpa.: domain name does not exist
[0] 229.12.177.195.in-addr.arpa.: domain name does not exist
[0] 230.12.177.195.in-addr.arpa.: domain name does not exist
[0] 231.12.177.195.in-addr.arpa.: domain name does not exist
[0] 232.12.177.195.in-addr.arpa.: domain name does not exist
[0] 233.12.177.195.in-addr.arpa.: domain name does not exist
[0] 234.12.177.195.in-addr.arpa.: domain name does not exist
[0] 235.12.177.195.in-addr.arpa.: domain name does not exist
[0] 236.12.177.195.in-addr.arpa.: domain name does not exist
[0] 237.12.177.195.in-addr.arpa.: domain name does not exist
[0] 238.12.177.195.in-addr.arpa.: domain name does not exist
[0] 239.12.177.195.in-addr.arpa.: domain name does not exist
[86400] 240.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-240.easynet.de
[86400] 241.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-241.easynet.de
[86400] 242.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-242.easynet.de
[86400] 243.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-243.easynet.de
[86400] 244.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-244.easynet.de
[86400] 245.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-245.easynet.de
[86400] 246.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-246.easynet.de
[86400] 247.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-247.easynet.de
[86400] 248.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-248.easynet.de
[86400] 249.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-249.easynet.de
[86400] 250.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-250.easynet.de
[86400] 251.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-251.easynet.de
[86400] 252.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-252.easynet.de
[86400] 253.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-253.easynet.de
[86400] 254.12.177.195.in-addr.arpa. domain name pointer a-195-177-12-254.easynet.de
[0] 255.12.177.195.in-addr.arpa.: domain name does not exist