Summary
| ASN | AS2 University of Delaware |
| BGP | 128.4.0.0/16 |
| IPs with RDNS | 255 |
| Hosted Domains | 0 |
| Pingable IPs | 1 |
| Router IPs | 0 |
| 128.4.21.0 | host-128-4-21-0.host.udel.edu | 0 |  | |
| 128.4.21.1 | host-128-4-21-1.host.udel.edu | 0 | | |
| 128.4.21.2 | packet.pc.cis.udel.edu | 0 | | |
| 128.4.21.3 | host-4-21-3.host.udel.edu | 0 | | |
| 128.4.21.4 | host-4-21-4.host.udel.edu | 0 | | |
| 128.4.21.5 | laptop1.pc.cis.udel.edu | 0 | | |
| 128.4.21.6 | laptop2.pc.cis.udel.edu | 0 | | |
| 128.4.21.7 | laptop3.pc.cis.udel.edu | 0 | | |
| 128.4.21.8 | host-4-21-8.host.udel.edu | 0 | | |
| 128.4.21.9 | host-4-21-9.host.udel.edu | 0 | | |
| 128.4.21.10 | chick.cis.udel.edu | 0 | | |
| 128.4.21.11 | host-4-21-11.host.udel.edu | 0 | | |
| 128.4.21.12 | mungbean.cis.udel.edu | 0 | | |
| 128.4.21.13 | tulip.cis.udel.edu | 0 | | |
| 128.4.21.14 | vims-laptop.pc.cis.udel.edu | 0 | | |
| 128.4.21.15 | host-4-21-15.host.udel.edu | 0 | | |
| 128.4.21.16 | elloyd-laptop.pc.cis.udel.edu | 0 | | |
| 128.4.21.17 | host-4-21-17.host.udel.edu | 0 | | |
| 128.4.21.18 | host-4-21-18.host.udel.edu | 0 | | |
| 128.4.21.19 | host-4-21-19.host.udel.edu | 0 | | |
| 128.4.21.20 | host-4-21-20.host.udel.edu | 0 | | |
| 128.4.21.21 | host-4-21-21.host.udel.edu | 0 | | |
| 128.4.21.22 | dodo.cis.udel.edu | 0 | | |
| 128.4.21.23 | host-4-21-23.host.udel.edu | 0 | | |
| 128.4.21.24 | hopper.hiper.cis.udel.edu | 0 | | |
| 128.4.21.25 | allen.hiper.cis.udel.edu | 0 | | |
| 128.4.21.26 | knuth.hiper.cis.udel.edu | 0 | | |
| 128.4.21.27 | turing.hiper.cis.udel.edu | 0 | | |
| 128.4.21.28 | lovelace.hiper.cis.udel.edu | 0 | | |
| 128.4.21.29 | host-4-21-29.host.udel.edu | 0 | | |
| 128.4.21.30 | host-4-21-30.host.udel.edu | 0 | | |
| 128.4.21.31 | host-4-21-31.host.udel.edu | 0 | | |
| 128.4.21.32 | host-4-21-32.host.udel.edu | 0 | | |
| 128.4.21.33 | host-4-21-33.host.udel.edu | 0 | | |
| 128.4.21.34 | host-4-21-34.host.udel.edu | 0 | | |
| 128.4.21.35 | host-4-21-35.host.udel.edu | 0 | | |
| 128.4.21.36 | host-4-21-36.host.udel.edu | 0 | | |
| 128.4.21.37 | host-4-21-37.host.udel.edu | 0 | | |
| 128.4.21.38 | host-4-21-38.host.udel.edu | 0 | | |
| 128.4.21.39 | host-4-21-39.host.udel.edu | 0 | | |
| 128.4.21.40 | pwr-mon.cis.udel.edu | 0 | | |
| 128.4.21.41 | host-4-21-41.host.udel.edu | 0 | | |
| 128.4.21.42 | host-4-21-42.host.udel.edu | 0 | | |
| 128.4.21.43 | host-4-21-43.host.udel.edu | 0 | | |
| 128.4.21.44 | host-4-21-44.host.udel.edu | 0 | | |
| 128.4.21.45 | franz.cis.udel.edu | 0 | | |
| 128.4.21.46 | ludwig.cis.udel.edu | 0 | | |
| 128.4.21.47 | host-4-21-47.host.udel.edu | 0 | | |
| 128.4.21.48 | host-4-21-48.host.udel.edu | 0 | | |
| 128.4.21.49 | host-4-21-49.host.udel.edu | 0 | | |
| 128.4.21.50 | host-4-21-50.host.udel.edu | 0 | | |
| 128.4.21.51 | old-vision.cis.udel.edu | 0 | | |
| 128.4.21.52 | ephelduath.hiper.cis.udel.edu | 0 | | |
| 128.4.21.53 | host-4-21-53.host.udel.edu | 0 | | |
| 128.4.21.54 | host-4-21-54.host.udel.edu | 0 | | |
| 128.4.21.55 | host-4-21-55.host.udel.edu | 0 | | |
| 128.4.21.56 | host-4-21-56.host.udel.edu | 0 | | |
| 128.4.21.57 | host-4-21-57.host.udel.edu | 0 | | |
| 128.4.21.58 | host-4-21-58.host.udel.edu | 0 | | |
| 128.4.21.59 | host-4-21-59.host.udel.edu | 0 | | |
| 128.4.21.60 | host-4-21-60.host.udel.edu | 0 | | |
| 128.4.21.61 | host-4-21-61.host.udel.edu | 0 | | |
| 128.4.21.62 | host-4-21-62.host.udel.edu | 0 | | |
| 128.4.21.63 | host-4-21-63.host.udel.edu | 0 | | |
| 128.4.21.64 | host-4-21-64.host.udel.edu | 0 | | |
| 128.4.21.65 | claude.cis.udel.edu | 0 | | |
| 128.4.21.66 | maurice.cis.udel.edu | 0 | | |
| 128.4.21.67 | host-4-21-67.host.udel.edu | 0 | | |
| 128.4.21.68 | host-4-21-68.host.udel.edu | 0 | | |
| 128.4.21.69 | host-4-21-69.host.udel.edu | 0 | | |
| 128.4.21.70 | host-4-21-70.host.udel.edu | 0 | | |
| 128.4.21.71 | host-4-21-71.host.udel.edu | 0 | | |
| 128.4.21.72 | host-4-21-72.host.udel.edu | 0 | | |
| 128.4.21.73 | host-4-21-73.host.udel.edu | 0 | | |
| 128.4.21.74 | host-4-21-74.host.udel.edu | 0 | | |
| 128.4.21.75 | host-4-21-75.host.udel.edu | 0 | | |
| 128.4.21.76 | host-4-21-76.host.udel.edu | 0 | | |
| 128.4.21.77 | host-4-21-77.host.udel.edu | 0 | | |
| 128.4.21.78 | host-4-21-78.host.udel.edu | 0 | | |
| 128.4.21.79 | host-4-21-79.host.udel.edu | 0 | | |
| 128.4.21.80 | host-4-21-80.host.udel.edu | 0 | | |
| 128.4.21.81 | host-4-21-81.host.udel.edu | 0 | | |
| 128.4.21.82 | host-4-21-82.host.udel.edu | 0 | | |
| 128.4.21.83 | host-4-21-83.host.udel.edu | 0 | | |
| 128.4.21.84 | host-4-21-84.host.udel.edu | 0 | | |
| 128.4.21.85 | host-4-21-85.host.udel.edu | 0 | | |
| 128.4.21.86 | host-4-21-86.host.udel.edu | 0 | | |
| 128.4.21.87 | host-4-21-87.host.udel.edu | 0 | | |
| 128.4.21.88 | rainier.cis.udel.edu | 0 | | |
| 128.4.21.89 | host-4-21-89.host.udel.edu | 0 | | |
| 128.4.21.90 | johann.cis.udel.edu | 0 | | |
| 128.4.21.91 | host-4-21-91.host.udel.edu | 0 | | |
| 128.4.21.92 | host-4-21-92.host.udel.edu | 0 | | |
| 128.4.21.93 | gondor.hiper.cis.udel.edu | 0 | | |
| 128.4.21.94 | host-4-21-94.host.udel.edu | 0 | | |
| 128.4.21.95 | host-4-21-95.host.udel.edu | 0 | | |
| 128.4.21.96 | host-4-21-96.host.udel.edu | 0 | | |
| 128.4.21.97 | host-4-21-97.host.udel.edu | 0 | | |
| 128.4.21.98 | host-4-21-98.host.udel.edu | 0 | | |
| 128.4.21.99 | mordor.hiper.cis.udel.edu | 0 | | |
| 128.4.21.100 | host-4-21-100.host.udel.edu | 0 | | |
| 128.4.21.101 | host-4-21-101.host.udel.edu | 0 | | |
| 128.4.21.102 | host-4-21-102.host.udel.edu | 0 | | |
| 128.4.21.103 | host-4-21-103.host.udel.edu | 0 | | |
| 128.4.21.104 | host-4-21-104.host.udel.edu | 0 | | |
| 128.4.21.105 | rohan.hiper.cis.udel.edu | 0 | | |
| 128.4.21.106 | lothlorien.hiper.cis.udel.edu | 0 | | |
| 128.4.21.107 | rivendell.hiper.cis.udel.edu | 0 | | |
| 128.4.21.108 | host-4-21-108.host.udel.edu | 0 | | |
| 128.4.21.109 | host-4-21-109.host.udel.edu | 0 | | |
| 128.4.21.110 | nameless.cis.udel.edu | 0 | | |
| 128.4.21.111 | host-4-21-111.host.udel.edu | 0 | | |
| 128.4.21.112 | host-4-21-112.host.udel.edu | 0 | | |
| 128.4.21.113 | xeno.liao.cis.udel.edu | 0 | | |
| 128.4.21.114 | host-4-21-114.host.udel.edu | 0 | | |
| 128.4.21.115 | host-4-21-115.host.udel.edu | 0 | | |
| 128.4.21.116 | vims-lab2.pc.cis.udel.edu | 0 | | |
| 128.4.21.117 | nikolai.cis.udel.edu | 0 | | |
| 128.4.21.118 | miles.cis.udel.edu | 0 | | |
| 128.4.21.119 | duke.cis.udel.edu | 0 | | |
| 128.4.21.120 | dizzy.cis.udel.edu | 0 | | |
| 128.4.21.121 | aaron.cis.udel.edu | 0 | | |
| 128.4.21.122 | shatkay7.pc.cis.udel.edu | 0 | | |
| 128.4.21.123 | host-4-21-123.host.udel.edu | 0 | | |
| 128.4.21.124 | host-4-21-124.host.udel.edu | 0 | | |
| 128.4.21.125 | host-4-21-125.host.udel.edu | 0 | | |
| 128.4.21.126 | host-4-21-126.host.udel.edu | 0 | | |
| 128.4.21.127 | host-4-21-127.host.udel.edu | 0 | | |
| 128.4.21.128 | host-4-21-128.host.udel.edu | 0 | | |
| 128.4.21.129 | host-4-21-129.host.udel.edu | 0 | | |
| 128.4.21.130 | host-4-21-130.host.udel.edu | 0 | | |
| 128.4.21.131 | host-4-21-131.host.udel.edu | 0 | | |
| 128.4.21.132 | host-4-21-132.host.udel.edu | 0 | | |
| 128.4.21.133 | host-4-21-133.host.udel.edu | 0 | | |
| 128.4.21.134 | host-4-21-134.host.udel.edu | 0 | | |
| 128.4.21.135 | host-4-21-135.host.udel.edu | 0 | | |
| 128.4.21.136 | host-4-21-136.host.udel.edu | 0 | | |
| 128.4.21.137 | host-4-21-137.host.udel.edu | 0 | | |
| 128.4.21.138 | host-4-21-138.host.udel.edu | 0 | | |
| 128.4.21.139 | host-4-21-139.host.udel.edu | 0 | | |
| 128.4.21.140 | host-4-21-140.host.udel.edu | 0 | | |
| 128.4.21.141 | host-4-21-141.host.udel.edu | 0 | | |
| 128.4.21.142 | host-4-21-142.host.udel.edu | 0 | | |
| 128.4.21.143 | host-4-21-143.host.udel.edu | 0 | | |
| 128.4.21.144 | host-4-21-144.host.udel.edu | 0 | | |
| 128.4.21.145 | host-4-21-145.host.udel.edu | 0 | | |
| 128.4.21.146 | host-4-21-146.host.udel.edu | 0 | | |
| 128.4.21.147 | host-4-21-147.host.udel.edu | 0 | | |
| 128.4.21.148 | host-4-21-148.host.udel.edu | 0 | | |
| 128.4.21.149 | host-4-21-149.host.udel.edu | 0 | | |
| 128.4.21.150 | host-4-21-150.host.udel.edu | 0 | | |
| 128.4.21.151 | host-4-21-151.host.udel.edu | 0 | | |
| 128.4.21.152 | host-4-21-152.host.udel.edu | 0 | | |
| 128.4.21.153 | host-4-21-153.host.udel.edu | 0 | | |
| 128.4.21.154 | host-4-21-154.host.udel.edu | 0 | | |
| 128.4.21.155 | host-4-21-155.host.udel.edu | 0 | | |
| 128.4.21.156 | host-4-21-156.host.udel.edu | 0 | | |
| 128.4.21.157 | host-4-21-157.host.udel.edu | 0 | | |
| 128.4.21.158 | host-4-21-158.host.udel.edu | 0 | | |
| 128.4.21.159 | host-4-21-159.host.udel.edu | 0 | | |
| 128.4.21.160 | host-4-21-160.host.udel.edu | 0 | | |
| 128.4.21.161 | host-4-21-161.host.udel.edu | 0 | | |
| 128.4.21.162 | host-4-21-162.host.udel.edu | 0 | | |
| 128.4.21.163 | host-4-21-163.host.udel.edu | 0 | | |
| 128.4.21.164 | host-4-21-164.host.udel.edu | 0 | | |
| 128.4.21.165 | host-4-21-165.host.udel.edu | 0 | | |
| 128.4.21.166 | host-4-21-166.host.udel.edu | 0 | | |
| 128.4.21.167 | host-4-21-167.host.udel.edu | 0 | | |
| 128.4.21.168 | host-4-21-168.host.udel.edu | 0 | | |
| 128.4.21.169 | host-4-21-169.host.udel.edu | 0 | | |
| 128.4.21.170 | host-4-21-170.host.udel.edu | 0 | | |
| 128.4.21.171 | host-4-21-171.host.udel.edu | 0 | | |
| 128.4.21.172 | host-4-21-172.host.udel.edu | 0 | | |
| 128.4.21.173 | host-4-21-173.host.udel.edu | 0 | | |
| 128.4.21.174 | host-4-21-174.host.udel.edu | 0 | | |
| 128.4.21.175 | host-4-21-175.host.udel.edu | 0 | | |
| 128.4.21.176 | host-4-21-176.host.udel.edu | 0 | | |
| 128.4.21.177 | host-4-21-177.host.udel.edu | 0 | | |
| 128.4.21.178 | host-4-21-178.host.udel.edu | 0 | | |
| 128.4.21.179 | host-4-21-179.host.udel.edu | 0 | | |
| 128.4.21.180 | host-4-21-180.host.udel.edu | 0 | | |
| 128.4.21.181 | host-4-21-181.host.udel.edu | 0 | | |
| 128.4.21.182 | host-4-21-182.host.udel.edu | 0 | | |
| 128.4.21.183 | host-4-21-183.host.udel.edu | 0 | | |
| 128.4.21.184 | host-4-21-184.host.udel.edu | 0 | | |
| 128.4.21.185 | host-4-21-185.host.udel.edu | 0 | | |
| 128.4.21.186 | host-4-21-186.host.udel.edu | 0 | | |
| 128.4.21.187 | host-4-21-187.host.udel.edu | 0 | | |
| 128.4.21.188 | host-4-21-188.host.udel.edu | 0 | | |
| 128.4.21.189 | host-4-21-189.host.udel.edu | 0 | | |
| 128.4.21.190 | host-4-21-190.host.udel.edu | 0 | | |
| 128.4.21.191 | host-4-21-191.host.udel.edu | 0 | | |
| 128.4.21.192 | roaming-4-21-192.host.udel.edu | 0 | | |
| 128.4.21.193 | roaming-4-21-193.host.udel.edu | 0 | | |
| 128.4.21.194 | roaming-4-21-194.host.udel.edu | 0 | | |
| 128.4.21.195 | roaming-4-21-195.host.udel.edu | 0 | | |
| 128.4.21.196 | roaming-4-21-196.host.udel.edu | 0 | | |
| 128.4.21.197 | roaming-4-21-197.host.udel.edu | 0 | | |
| 128.4.21.198 | roaming-4-21-198.host.udel.edu | 0 | | |
| 128.4.21.199 | roaming-4-21-199.host.udel.edu | 0 | | |
| 128.4.21.200 | roaming-4-21-200.host.udel.edu | 0 | | |
| 128.4.21.201 | roaming-4-21-201.host.udel.edu | 0 | | |
| 128.4.21.202 | roaming-4-21-202.host.udel.edu | 0 | | |
| 128.4.21.203 | roaming-4-21-203.host.udel.edu | 0 | | |
| 128.4.21.204 | roaming-4-21-204.host.udel.edu | 0 | | |
| 128.4.21.205 | roaming-4-21-205.host.udel.edu | 0 | | |
| 128.4.21.206 | roaming-4-21-206.host.udel.edu | 0 | | |
| 128.4.21.207 | roaming-4-21-207.host.udel.edu | 0 | | |
| 128.4.21.208 | roaming-4-21-208.host.udel.edu | 0 | | |
| 128.4.21.209 | roaming-4-21-209.host.udel.edu | 0 | | |
| 128.4.21.210 | roaming-4-21-210.host.udel.edu | 0 | | |
| 128.4.21.211 | roaming-4-21-211.host.udel.edu | 0 | | |
| 128.4.21.212 | roaming-4-21-212.host.udel.edu | 0 | | |
| 128.4.21.213 | roaming-4-21-213.host.udel.edu | 0 | | |
| 128.4.21.214 | roaming-4-21-214.host.udel.edu | 0 | | |
| 128.4.21.215 | roaming-4-21-215.host.udel.edu | 0 | | |
| 128.4.21.216 | roaming-4-21-216.host.udel.edu | 0 | | |
| 128.4.21.217 | roaming-4-21-217.host.udel.edu | 0 | | |
| 128.4.21.218 | roaming-4-21-218.host.udel.edu | 0 | | |
| 128.4.21.219 | roaming-4-21-219.host.udel.edu | 0 | | |
| 128.4.21.220 | roaming-4-21-220.host.udel.edu | 0 | | |
| 128.4.21.221 | roaming-4-21-221.host.udel.edu | 0 | | |
| 128.4.21.222 | roaming-4-21-222.host.udel.edu | 0 | | |
| 128.4.21.223 | roaming-4-21-223.host.udel.edu | 0 | | |
| 128.4.21.224 | roaming-4-21-224.host.udel.edu | 0 | | |
| 128.4.21.225 | roaming-4-21-225.host.udel.edu | 0 | | |
| 128.4.21.226 | roaming-4-21-226.host.udel.edu | 0 | | |
| 128.4.21.227 | roaming-4-21-227.host.udel.edu | 0 | | |
| 128.4.21.228 | roaming-4-21-228.host.udel.edu | 0 | | |
| 128.4.21.229 | roaming-4-21-229.host.udel.edu | 0 | | |
| 128.4.21.230 | roaming-4-21-230.host.udel.edu | 0 | | |
| 128.4.21.231 | roaming-4-21-231.host.udel.edu | 0 | | |
| 128.4.21.232 | roaming-4-21-232.host.udel.edu | 0 | | |
| 128.4.21.233 | roaming-4-21-233.host.udel.edu | 0 | | |
| 128.4.21.234 | roaming-4-21-234.host.udel.edu | 0 | | |
| 128.4.21.235 | roaming-4-21-235.host.udel.edu | 0 | | |
| 128.4.21.236 | roaming-4-21-236.host.udel.edu | 0 | | |
| 128.4.21.237 | roaming-4-21-237.host.udel.edu | 0 | | |
| 128.4.21.238 | roaming-4-21-238.host.udel.edu | 0 | | |
| 128.4.21.239 | roaming-4-21-239.host.udel.edu | 0 | | |
| 128.4.21.240 | roaming-4-21-240.host.udel.edu | 0 | | |
| 128.4.21.241 | roaming-4-21-241.host.udel.edu | 0 | | |
| 128.4.21.242 | roaming-4-21-242.host.udel.edu | 0 | | |
| 128.4.21.243 | roaming-4-21-243.host.udel.edu | 0 | | |
| 128.4.21.244 | roaming-4-21-244.host.udel.edu | 0 | | |
| 128.4.21.245 | roaming-4-21-245.host.udel.edu | 0 | | |
| 128.4.21.246 | roaming-4-21-246.host.udel.edu | 0 | | |
| 128.4.21.247 | roaming-4-21-247.host.udel.edu | 0 | | |
| 128.4.21.248 | roaming-4-21-248.host.udel.edu | 0 | | |
| 128.4.21.249 | roaming-4-21-249.host.udel.edu | 0 | | |
| 128.4.21.250 | roaming-4-21-250.host.udel.edu | 0 | | |
| 128.4.21.251 | roaming-4-21-251.host.udel.edu | 0 | | |
| 128.4.21.252 | roaming-4-21-252.host.udel.edu | 0 | | |
| 128.4.21.253 | host-4-21-253.host.udel.edu | 0 | | |
| 128.4.21.254 | host-4-21-254.host.udel.edu | 0 | | |
| 128.4.21.255 | — | 0 | | |
Traceroute
Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.
$ traceroute -a -n -q1 -m10 128.4.21.72
traceroute to 128.4.21.72 (128.4.21.72): 10 hops max, 52 byte packets
2 *
4 *
6 *
8 *
9 *
10 *
Measurement taken from 
IPinfo ProbeNet in Cayenne, GF
IPinfo ProbeNet in Cayenne, GFOn