[0] 0.41.122.168.in-addr.arpa.: domain name does not exist [3600] 1.41.122.168.in-addr.arpa. domain name pointer comm595-0403net-gw.bu.edu [0] 2.41.122.168.in-addr.arpa.: domain name does not exist [0] 3.41.122.168.in-addr.arpa.: domain name does not exist [0] 4.41.122.168.in-addr.arpa.: domain name does not exist [0] 5.41.122.168.in-addr.arpa.: domain name does not exist [0] 6.41.122.168.in-addr.arpa.: domain name does not exist [0] 7.41.122.168.in-addr.arpa.: domain name does not exist [0] 8.41.122.168.in-addr.arpa.: domain name does not exist [0] 9.41.122.168.in-addr.arpa.: domain name does not exist [0] 10.41.122.168.in-addr.arpa.: domain name does not exist [3600] 11.41.122.168.in-addr.arpa. domain name pointer comm595-407aer01.bu.edu [3600] 12.41.122.168.in-addr.arpa. domain name pointer comm595-407aer02.bu.edu [3600] 13.41.122.168.in-addr.arpa. domain name pointer comm595-412aer01.bu.edu [0] 14.41.122.168.in-addr.arpa.: domain name does not exist [0] 15.41.122.168.in-addr.arpa.: domain name does not exist [0] 16.41.122.168.in-addr.arpa.: domain name does not exist [0] 17.41.122.168.in-addr.arpa.: domain name does not exist [0] 18.41.122.168.in-addr.arpa.: domain name does not exist [0] 19.41.122.168.in-addr.arpa.: domain name does not exist [0] 20.41.122.168.in-addr.arpa.: domain name does not exist [0] 21.41.122.168.in-addr.arpa.: domain name does not exist [0] 22.41.122.168.in-addr.arpa.: domain name does not exist [0] 23.41.122.168.in-addr.arpa.: domain name does not exist [0] 24.41.122.168.in-addr.arpa.: domain name does not exist [0] 25.41.122.168.in-addr.arpa.: domain name does not exist [0] 26.41.122.168.in-addr.arpa.: domain name does not exist [0] 27.41.122.168.in-addr.arpa.: domain name does not exist [0] 28.41.122.168.in-addr.arpa.: domain name does not exist [0] 29.41.122.168.in-addr.arpa.: domain name does not exist [0] 30.41.122.168.in-addr.arpa.: domain name does not exist [3600] 31.41.122.168.in-addr.arpa. domain name pointer comm595-0403-031.bu.edu [3600] 32.41.122.168.in-addr.arpa. domain name pointer comm595-0403-032.bu.edu [3600] 33.41.122.168.in-addr.arpa. domain name pointer comm595-0403-033.bu.edu [3600] 34.41.122.168.in-addr.arpa. domain name pointer comm595-0403-034.bu.edu [3600] 35.41.122.168.in-addr.arpa. domain name pointer comm595-0403-035.bu.edu [3600] 36.41.122.168.in-addr.arpa. domain name pointer comm595-0403-036.bu.edu [3600] 37.41.122.168.in-addr.arpa. domain name pointer comm595-0403-037.bu.edu [3600] 38.41.122.168.in-addr.arpa. domain name pointer comm595-0403-038.bu.edu [3600] 39.41.122.168.in-addr.arpa. domain name pointer comm595-0403-039.bu.edu [3600] 40.41.122.168.in-addr.arpa. domain name pointer comm595-0403-040.bu.edu [3600] 41.41.122.168.in-addr.arpa. domain name pointer comm595-0403-041.bu.edu [3600] 42.41.122.168.in-addr.arpa. domain name pointer comm595-0403-042.bu.edu [3600] 43.41.122.168.in-addr.arpa. domain name pointer comm595-0403-043.bu.edu [3600] 44.41.122.168.in-addr.arpa. domain name pointer comm595-0403-044.bu.edu [3600] 45.41.122.168.in-addr.arpa. domain name pointer comm595-0403-045.bu.edu [3600] 46.41.122.168.in-addr.arpa. domain name pointer comm595-0403-046.bu.edu [3600] 47.41.122.168.in-addr.arpa. domain name pointer comm595-0403-047.bu.edu [3600] 48.41.122.168.in-addr.arpa. domain name pointer comm595-0403-048.bu.edu [3600] 49.41.122.168.in-addr.arpa. domain name pointer comm595-0403-049.bu.edu [3600] 50.41.122.168.in-addr.arpa. domain name pointer comm595-0403-050.bu.edu [3600] 51.41.122.168.in-addr.arpa. domain name pointer comm595-0403-051.bu.edu [3600] 52.41.122.168.in-addr.arpa. domain name pointer comm595-0403-052.bu.edu [3600] 53.41.122.168.in-addr.arpa. domain name pointer comm595-0403-053.bu.edu [3600] 54.41.122.168.in-addr.arpa. domain name pointer comm595-0403-054.bu.edu [3600] 55.41.122.168.in-addr.arpa. domain name pointer comm595-0403-055.bu.edu [3600] 56.41.122.168.in-addr.arpa. domain name pointer comm595-0403-056.bu.edu [3600] 57.41.122.168.in-addr.arpa. domain name pointer comm595-0403-057.bu.edu [3600] 58.41.122.168.in-addr.arpa. domain name pointer comm595-0403-058.bu.edu [3600] 59.41.122.168.in-addr.arpa. domain name pointer comm595-0403-059.bu.edu [3600] 60.41.122.168.in-addr.arpa. domain name pointer comm595-0403-060.bu.edu [3600] 61.41.122.168.in-addr.arpa. domain name pointer comm595-0403-061.bu.edu [3600] 62.41.122.168.in-addr.arpa. domain name pointer comm595-0403-062.bu.edu [3600] 63.41.122.168.in-addr.arpa. domain name pointer comm595-0403-063.bu.edu [3600] 64.41.122.168.in-addr.arpa. domain name pointer comm595-0403-064.bu.edu [3600] 65.41.122.168.in-addr.arpa. domain name pointer comm595-0403-065.bu.edu [3600] 66.41.122.168.in-addr.arpa. domain name pointer comm595-0403-066.bu.edu [3600] 67.41.122.168.in-addr.arpa. domain name pointer comm595-0403-067.bu.edu [3600] 68.41.122.168.in-addr.arpa. domain name pointer comm595-0403-068.bu.edu [3600] 69.41.122.168.in-addr.arpa. domain name pointer comm595-0403-069.bu.edu [3600] 70.41.122.168.in-addr.arpa. domain name pointer comm595-0403-070.bu.edu [3600] 71.41.122.168.in-addr.arpa. domain name pointer comm595-0403-071.bu.edu [3600] 72.41.122.168.in-addr.arpa. domain name pointer comm595-0403-072.bu.edu [3600] 73.41.122.168.in-addr.arpa. domain name pointer comm595-0403-073.bu.edu [3600] 74.41.122.168.in-addr.arpa. domain name pointer comm595-0403-074.bu.edu [3600] 75.41.122.168.in-addr.arpa. domain name pointer comm595-0403-075.bu.edu [3600] 76.41.122.168.in-addr.arpa. domain name pointer comm595-0403-076.bu.edu [3600] 77.41.122.168.in-addr.arpa. domain name pointer comm595-0403-077.bu.edu [3600] 78.41.122.168.in-addr.arpa. domain name pointer comm595-0403-078.bu.edu [3600] 79.41.122.168.in-addr.arpa. domain name pointer comm595-0403-079.bu.edu [3600] 80.41.122.168.in-addr.arpa. domain name pointer comm595-0403-080.bu.edu [3600] 81.41.122.168.in-addr.arpa. domain name pointer comm595-0403-081.bu.edu [3600] 82.41.122.168.in-addr.arpa. domain name pointer comm595-0403-082.bu.edu [3600] 83.41.122.168.in-addr.arpa. domain name pointer comm595-0403-083.bu.edu [3600] 84.41.122.168.in-addr.arpa. domain name pointer comm595-0403-084.bu.edu [3600] 85.41.122.168.in-addr.arpa. domain name pointer comm595-0403-085.bu.edu [3600] 86.41.122.168.in-addr.arpa. domain name pointer comm595-0403-086.bu.edu [3600] 87.41.122.168.in-addr.arpa. domain name pointer comm595-0403-087.bu.edu [3600] 88.41.122.168.in-addr.arpa. domain name pointer comm595-0403-088.bu.edu [3600] 89.41.122.168.in-addr.arpa. domain name pointer comm595-0403-089.bu.edu [3600] 90.41.122.168.in-addr.arpa. domain name pointer comm595-0403-090.bu.edu [3600] 91.41.122.168.in-addr.arpa. domain name pointer comm595-0403-091.bu.edu [3600] 92.41.122.168.in-addr.arpa. domain name pointer comm595-0403-092.bu.edu [3600] 93.41.122.168.in-addr.arpa. domain name pointer comm595-0403-093.bu.edu [3600] 94.41.122.168.in-addr.arpa. domain name pointer comm595-0403-094.bu.edu [3600] 95.41.122.168.in-addr.arpa. domain name pointer comm595-0403-095.bu.edu [3600] 96.41.122.168.in-addr.arpa. domain name pointer comm595-0403-096.bu.edu [3600] 97.41.122.168.in-addr.arpa. domain name pointer comm595-0403-097.bu.edu [3600] 98.41.122.168.in-addr.arpa. domain name pointer comm595-0403-098.bu.edu [3600] 99.41.122.168.in-addr.arpa. domain name pointer comm595-0403-099.bu.edu [3600] 100.41.122.168.in-addr.arpa. domain name pointer comm595-0403-100.bu.edu [3600] 101.41.122.168.in-addr.arpa. domain name pointer comm595-0403-101.bu.edu [3600] 102.41.122.168.in-addr.arpa. domain name pointer comm595-0403-102.bu.edu [3600] 103.41.122.168.in-addr.arpa. domain name pointer comm595-0403-103.bu.edu [3600] 104.41.122.168.in-addr.arpa. domain name pointer comm595-0403-104.bu.edu [3600] 105.41.122.168.in-addr.arpa. domain name pointer comm595-0403-105.bu.edu [3600] 106.41.122.168.in-addr.arpa. domain name pointer comm595-0403-106.bu.edu [3600] 107.41.122.168.in-addr.arpa. domain name pointer comm595-0403-107.bu.edu [3600] 108.41.122.168.in-addr.arpa. domain name pointer comm595-0403-108.bu.edu [3600] 109.41.122.168.in-addr.arpa. domain name pointer comm595-0403-109.bu.edu [3600] 110.41.122.168.in-addr.arpa. domain name pointer comm595-0403-110.bu.edu [3600] 111.41.122.168.in-addr.arpa. domain name pointer comm595-0403-111.bu.edu [3600] 112.41.122.168.in-addr.arpa. domain name pointer comm595-0403-112.bu.edu [3600] 113.41.122.168.in-addr.arpa. domain name pointer comm595-0403-113.bu.edu [3600] 114.41.122.168.in-addr.arpa. domain name pointer comm595-0403-114.bu.edu [3600] 115.41.122.168.in-addr.arpa. domain name pointer comm595-0403-115.bu.edu [3600] 116.41.122.168.in-addr.arpa. domain name pointer comm595-0403-116.bu.edu [3600] 117.41.122.168.in-addr.arpa. domain name pointer comm595-0403-117.bu.edu [3600] 118.41.122.168.in-addr.arpa. domain name pointer comm595-0403-118.bu.edu [3600] 119.41.122.168.in-addr.arpa. domain name pointer comm595-0403-119.bu.edu [3600] 120.41.122.168.in-addr.arpa. domain name pointer comm595-0403-120.bu.edu [3600] 121.41.122.168.in-addr.arpa. domain name pointer comm595-0403-121.bu.edu [3600] 122.41.122.168.in-addr.arpa. domain name pointer comm595-0403-122.bu.edu [3600] 123.41.122.168.in-addr.arpa. domain name pointer comm595-0403-123.bu.edu [3600] 124.41.122.168.in-addr.arpa. domain name pointer comm595-0403-124.bu.edu [3600] 125.41.122.168.in-addr.arpa. domain name pointer comm595-0403-125.bu.edu [3600] 126.41.122.168.in-addr.arpa. domain name pointer comm595-0403-126.bu.edu [3600] 127.41.122.168.in-addr.arpa. domain name pointer comm595-0403-127.bu.edu [3600] 128.41.122.168.in-addr.arpa. domain name pointer comm595-0403-128.bu.edu [3600] 129.41.122.168.in-addr.arpa. domain name pointer comm595-0403-129.bu.edu [3600] 130.41.122.168.in-addr.arpa. domain name pointer comm595-0403-130.bu.edu [3600] 131.41.122.168.in-addr.arpa. domain name pointer comm595-0403-131.bu.edu [3600] 132.41.122.168.in-addr.arpa. domain name pointer comm595-0403-132.bu.edu [3600] 133.41.122.168.in-addr.arpa. domain name pointer comm595-0403-133.bu.edu [3600] 134.41.122.168.in-addr.arpa. domain name pointer comm595-0403-134.bu.edu [3600] 135.41.122.168.in-addr.arpa. domain name pointer comm595-0403-135.bu.edu [3600] 136.41.122.168.in-addr.arpa. domain name pointer comm595-0403-136.bu.edu [3600] 137.41.122.168.in-addr.arpa. domain name pointer comm595-0403-137.bu.edu [3600] 138.41.122.168.in-addr.arpa. domain name pointer comm595-0403-138.bu.edu [3600] 139.41.122.168.in-addr.arpa. domain name pointer comm595-0403-139.bu.edu [3600] 140.41.122.168.in-addr.arpa. domain name pointer comm595-0403-140.bu.edu [3600] 141.41.122.168.in-addr.arpa. domain name pointer comm595-0403-141.bu.edu [3600] 142.41.122.168.in-addr.arpa. domain name pointer comm595-0403-142.bu.edu [3600] 143.41.122.168.in-addr.arpa. domain name pointer comm595-0403-143.bu.edu [3600] 144.41.122.168.in-addr.arpa. domain name pointer comm595-0403-144.bu.edu [3600] 145.41.122.168.in-addr.arpa. domain name pointer comm595-0403-145.bu.edu [3600] 146.41.122.168.in-addr.arpa. domain name pointer comm595-0403-146.bu.edu [3600] 147.41.122.168.in-addr.arpa. domain name pointer comm595-0403-147.bu.edu [3600] 148.41.122.168.in-addr.arpa. domain name pointer comm595-0403-148.bu.edu [3600] 149.41.122.168.in-addr.arpa. domain name pointer comm595-0403-149.bu.edu [3600] 150.41.122.168.in-addr.arpa. domain name pointer comm595-0403-150.bu.edu [3600] 151.41.122.168.in-addr.arpa. domain name pointer comm595-0403-151.bu.edu [3600] 152.41.122.168.in-addr.arpa. domain name pointer comm595-0403-152.bu.edu [3600] 153.41.122.168.in-addr.arpa. domain name pointer comm595-0403-153.bu.edu [3600] 154.41.122.168.in-addr.arpa. domain name pointer comm595-0403-154.bu.edu [3600] 155.41.122.168.in-addr.arpa. domain name pointer comm595-0403-155.bu.edu [3600] 156.41.122.168.in-addr.arpa. domain name pointer comm595-0403-156.bu.edu [3600] 157.41.122.168.in-addr.arpa. domain name pointer comm595-0403-157.bu.edu [3600] 158.41.122.168.in-addr.arpa. domain name pointer comm595-0403-158.bu.edu [3600] 159.41.122.168.in-addr.arpa. domain name pointer comm595-0403-159.bu.edu [3600] 160.41.122.168.in-addr.arpa. domain name pointer comm595-0403-160.bu.edu [3600] 161.41.122.168.in-addr.arpa. domain name pointer comm595-0403-161.bu.edu [3600] 162.41.122.168.in-addr.arpa. domain name pointer comm595-0403-162.bu.edu [3600] 163.41.122.168.in-addr.arpa. domain name pointer comm595-0403-163.bu.edu [3600] 164.41.122.168.in-addr.arpa. domain name pointer comm595-0403-164.bu.edu [3600] 165.41.122.168.in-addr.arpa. domain name pointer comm595-0403-165.bu.edu [3600] 166.41.122.168.in-addr.arpa. domain name pointer comm595-0403-166.bu.edu [3600] 167.41.122.168.in-addr.arpa. domain name pointer comm595-0403-167.bu.edu [3600] 168.41.122.168.in-addr.arpa. domain name pointer comm595-0403-168.bu.edu [3600] 169.41.122.168.in-addr.arpa. domain name pointer comm595-0403-169.bu.edu [3600] 170.41.122.168.in-addr.arpa. domain name pointer comm595-0403-170.bu.edu [3600] 171.41.122.168.in-addr.arpa. domain name pointer comm595-0403-171.bu.edu [3600] 172.41.122.168.in-addr.arpa. domain name pointer comm595-0403-172.bu.edu [3600] 173.41.122.168.in-addr.arpa. domain name pointer comm595-0403-173.bu.edu [3600] 174.41.122.168.in-addr.arpa. domain name pointer comm595-0403-174.bu.edu [3600] 175.41.122.168.in-addr.arpa. domain name pointer comm595-0403-175.bu.edu [3600] 176.41.122.168.in-addr.arpa. domain name pointer comm595-0403-176.bu.edu [3600] 177.41.122.168.in-addr.arpa. domain name pointer comm595-0403-177.bu.edu [3600] 178.41.122.168.in-addr.arpa. domain name pointer comm595-0403-178.bu.edu [3600] 179.41.122.168.in-addr.arpa. domain name pointer comm595-0403-179.bu.edu [3600] 180.41.122.168.in-addr.arpa. domain name pointer comm595-0403-180.bu.edu [3600] 181.41.122.168.in-addr.arpa. domain name pointer comm595-0403-181.bu.edu [3600] 182.41.122.168.in-addr.arpa. domain name pointer comm595-0403-182.bu.edu [3600] 183.41.122.168.in-addr.arpa. domain name pointer comm595-0403-183.bu.edu [3600] 184.41.122.168.in-addr.arpa. domain name pointer comm595-0403-184.bu.edu [3600] 185.41.122.168.in-addr.arpa. domain name pointer comm595-0403-185.bu.edu [3600] 186.41.122.168.in-addr.arpa. domain name pointer comm595-0403-186.bu.edu [3600] 187.41.122.168.in-addr.arpa. domain name pointer comm595-0403-187.bu.edu [3600] 188.41.122.168.in-addr.arpa. domain name pointer comm595-0403-188.bu.edu [3600] 189.41.122.168.in-addr.arpa. domain name pointer comm595-0403-189.bu.edu [3600] 190.41.122.168.in-addr.arpa. domain name pointer comm595-0403-190.bu.edu [3600] 191.41.122.168.in-addr.arpa. domain name pointer comm595-0403-191.bu.edu [3600] 192.41.122.168.in-addr.arpa. domain name pointer comm595-0403-192.bu.edu [3600] 193.41.122.168.in-addr.arpa. domain name pointer comm595-0403-193.bu.edu [3600] 194.41.122.168.in-addr.arpa. domain name pointer comm595-0403-194.bu.edu [3600] 195.41.122.168.in-addr.arpa. domain name pointer comm595-0403-195.bu.edu [3600] 196.41.122.168.in-addr.arpa. domain name pointer comm595-0403-196.bu.edu [3600] 197.41.122.168.in-addr.arpa. domain name pointer comm595-0403-197.bu.edu [3600] 198.41.122.168.in-addr.arpa. domain name pointer comm595-0403-198.bu.edu [3600] 199.41.122.168.in-addr.arpa. domain name pointer comm595-0403-199.bu.edu [3600] 200.41.122.168.in-addr.arpa. domain name pointer comm595-0403-200.bu.edu [3600] 201.41.122.168.in-addr.arpa. domain name pointer comm595-0403-201.bu.edu [3600] 202.41.122.168.in-addr.arpa. domain name pointer comm595-0403-202.bu.edu [3600] 203.41.122.168.in-addr.arpa. domain name pointer comm595-0403-203.bu.edu [3600] 204.41.122.168.in-addr.arpa. domain name pointer comm595-0403-204.bu.edu [3600] 205.41.122.168.in-addr.arpa. domain name pointer comm595-0403-205.bu.edu [3600] 206.41.122.168.in-addr.arpa. domain name pointer comm595-0403-206.bu.edu [3600] 207.41.122.168.in-addr.arpa. domain name pointer comm595-0403-207.bu.edu [3600] 208.41.122.168.in-addr.arpa. domain name pointer comm595-0403-208.bu.edu [3600] 209.41.122.168.in-addr.arpa. domain name pointer comm595-0403-209.bu.edu [3600] 210.41.122.168.in-addr.arpa. domain name pointer comm595-0403-210.bu.edu [3600] 211.41.122.168.in-addr.arpa. domain name pointer comm595-0403-211.bu.edu [3600] 212.41.122.168.in-addr.arpa. domain name pointer comm595-0403-212.bu.edu [3600] 213.41.122.168.in-addr.arpa. domain name pointer comm595-0403-213.bu.edu [3600] 214.41.122.168.in-addr.arpa. domain name pointer comm595-0403-214.bu.edu [3600] 215.41.122.168.in-addr.arpa. domain name pointer comm595-0403-215.bu.edu [3600] 216.41.122.168.in-addr.arpa. domain name pointer comm595-0403-216.bu.edu [3600] 217.41.122.168.in-addr.arpa. domain name pointer comm595-0403-217.bu.edu [3600] 218.41.122.168.in-addr.arpa. domain name pointer comm595-0403-218.bu.edu [3600] 219.41.122.168.in-addr.arpa. domain name pointer comm595-0403-219.bu.edu [3600] 220.41.122.168.in-addr.arpa. domain name pointer comm595-0403-220.bu.edu [3600] 221.41.122.168.in-addr.arpa. domain name pointer comm595-0403-221.bu.edu [3600] 222.41.122.168.in-addr.arpa. domain name pointer comm595-0403-222.bu.edu [3600] 223.41.122.168.in-addr.arpa. domain name pointer comm595-0403-223.bu.edu [3600] 224.41.122.168.in-addr.arpa. domain name pointer comm595-0403-224.bu.edu [3600] 225.41.122.168.in-addr.arpa. domain name pointer comm595-0403-225.bu.edu [3600] 226.41.122.168.in-addr.arpa. domain name pointer comm595-0403-226.bu.edu [3600] 227.41.122.168.in-addr.arpa. domain name pointer comm595-0403-227.bu.edu [3600] 228.41.122.168.in-addr.arpa. domain name pointer comm595-0403-228.bu.edu [3600] 229.41.122.168.in-addr.arpa. domain name pointer comm595-0403-229.bu.edu [3600] 230.41.122.168.in-addr.arpa. domain name pointer comm595-0403-230.bu.edu [3600] 231.41.122.168.in-addr.arpa. domain name pointer comm595-0403-231.bu.edu [3600] 232.41.122.168.in-addr.arpa. domain name pointer comm595-0403-232.bu.edu [3600] 233.41.122.168.in-addr.arpa. domain name pointer comm595-0403-233.bu.edu [3600] 234.41.122.168.in-addr.arpa. domain name pointer comm595-0403-234.bu.edu [3600] 235.41.122.168.in-addr.arpa. domain name pointer comm595-0403-235.bu.edu [3600] 236.41.122.168.in-addr.arpa. domain name pointer comm595-0403-236.bu.edu [3600] 237.41.122.168.in-addr.arpa. domain name pointer comm595-0403-237.bu.edu [3600] 238.41.122.168.in-addr.arpa. domain name pointer comm595-0403-238.bu.edu [3600] 239.41.122.168.in-addr.arpa. domain name pointer comm595-0403-239.bu.edu [3600] 240.41.122.168.in-addr.arpa. domain name pointer comm595-0403-240.bu.edu [3600] 241.41.122.168.in-addr.arpa. domain name pointer scfvis.bu.edu [3600] 242.41.122.168.in-addr.arpa. domain name pointer smgpodium406.bu.edu [3600] 243.41.122.168.in-addr.arpa. domain name pointer smgpodium410.bu.edu [3600] 244.41.122.168.in-addr.arpa. domain name pointer smgpodium412.bu.edu [0] 245.41.122.168.in-addr.arpa.: domain name does not exist [0] 246.41.122.168.in-addr.arpa.: domain name does not exist [0] 247.41.122.168.in-addr.arpa.: domain name does not exist [0] 248.41.122.168.in-addr.arpa.: domain name does not exist [0] 249.41.122.168.in-addr.arpa.: domain name does not exist [0] 250.41.122.168.in-addr.arpa.: domain name does not exist [0] 251.41.122.168.in-addr.arpa.: domain name does not exist [0] 252.41.122.168.in-addr.arpa.: domain name does not exist [0] 253.41.122.168.in-addr.arpa.: domain name does not exist [0] 254.41.122.168.in-addr.arpa.: domain name does not exist [0] 255.41.122.168.in-addr.arpa.: domain name does not exist