Summary
| ASN | AS2 University of Delaware |
| BGP | 128.4.0.0/16 |
| IPs with RDNS | 250 |
| Hosted Domains | 0 |
| Pingable IPs | 0 |
| Router IPs | 0 |
| 128.4.23.0 | — | 0 |  | |
| 128.4.23.1 | sw-nc01-7a-8-irb-459.nis.udel.edu | 0 | | |
| 128.4.23.2 | host-128-4-23-2.nss.udel.edu | 0 | | |
| 128.4.23.3 | engr-fw01.engr.udel.edu | 0 | | |
| 128.4.23.4 | host-128-4-23-4.nss.udel.edu | 0 | | |
| 128.4.23.5 | host-128-4-23-5.nss.udel.edu | 0 | | |
| 128.4.23.6 | host-128-4-23-6.nss.udel.edu | 0 | | |
| 128.4.23.7 | host-4-23-7.host.udel.edu | 0 | | |
| 128.4.23.8 | host-128-4-23-8.nss.udel.edu | 0 | | |
| 128.4.23.9 | host-128-4-23-9.nss.udel.edu | 0 | | |
| 128.4.23.10 | engr-nas00.engr.udel.edu | 0 | | |
| 128.4.23.11 | host-4-23-11.host.udel.edu | 0 | | |
| 128.4.23.12 | engr-nas02.engr.udel.edu | 0 | | |
| 128.4.23.13 | engr-nas03.engr.udel.edu | 0 | | |
| 128.4.23.14 | engr-vmdc01.vdi.engr.udel.edu | 0 | | |
| 128.4.23.15 | engr-subca.vdi.engr.udel.edu | 0 | | |
| 128.4.23.16 | engr-hvconsvr01.vdi.engr.udel.edu | 0 | | |
| 128.4.23.17 | engr-hvcmpsr01.vdi.engr.udel.edu | 0 | | |
| 128.4.23.18 | engr-hvappvol01.vdi.engr.udel.edu | 0 | | |
| 128.4.23.19 | engr-vmdb01.vdi.engr.udel.edu | 0 | | |
| 128.4.23.20 | engr-esxi00.engr.udel.edu | 0 | | |
| 128.4.23.21 | engr-esxi01.engr.udel.edu | 0 | | |
| 128.4.23.22 | engr-esxi02.engr.udel.edu | 0 | | |
| 128.4.23.23 | engr-esxi03.engr.udel.edu | 0 | | |
| 128.4.23.24 | host-4-23-24.host.udel.edu | 0 | | |
| 128.4.23.25 | engr-uebc01.engr.udel.edu | 0 | | |
| 128.4.23.26 | host-128-4-23-26.nss.udel.edu | 0 | | |
| 128.4.23.27 | host-4-23-27.host.udel.edu | 0 | | |
| 128.4.23.28 | engr-unitrends.engr.udel.edu | 0 | | |
| 128.4.23.29 | host-4-23-29.host.udel.edu | 0 | | |
| 128.4.23.30 | host-4-23-30.host.udel.edu | 0 | | |
| 128.4.23.31 | host-128-4-23-31.nss.udel.edu | 0 | | |
| 128.4.23.32 | pandora.engg.udel.edu | 0 | | |
| 128.4.23.33 | host-4-23-33.host.udel.edu | 0 | | |
| 128.4.23.34 | engr-spnt-03.win.udel.edu | 0 | | |
| 128.4.23.35 | host-4-23-35.host.udel.edu | 0 | | |
| 128.4.23.36 | host-128-4-23-36.nss.udel.edu | 0 | | |
| 128.4.23.37 | host-128-4-23-37.nss.udel.edu | 0 | | |
| 128.4.23.38 | host-128-4-23-38.nss.udel.edu | 0 | | |
| 128.4.23.39 | host-128-4-23-39.nss.udel.edu | 0 | | |
| 128.4.23.40 | engr-spnt-02.win.udel.edu | 0 | | |
| 128.4.23.41 | host-128-4-23-41.nss.udel.edu | 0 | | |
| 128.4.23.42 | engr-spnt-04.win.udel.edu | 0 | | |
| 128.4.23.43 | host-4-23-43.host.udel.edu | 0 | | |
| 128.4.23.44 | host-4-23-44.host.udel.edu | 0 | | |
| 128.4.23.45 | host-4-23-45.host.udel.edu | 0 | | |
| 128.4.23.46 | engr-k2000-01.engr.udel.edu | 0 | | |
| 128.4.23.47 | host-4-23-47.host.udel.edu | 0 | | |
| 128.4.23.48 | host-4-23-48.host.udel.edu | 0 | | |
| 128.4.23.49 | host-4-23-49.host.udel.edu | 0 | | |
| 128.4.23.50 | usb01.engr.udel.edu | 0 | | |
| 128.4.23.51 | host-128-4-23-51.nss.udel.edu | 0 | | |
| 128.4.23.52 | wsus.engg.udel.edu | 0 | | |
| 128.4.23.53 | host-4-23-53.host.udel.edu | 0 | | |
| 128.4.23.54 | neptune.engg.udel.edu | 0 | | |
| 128.4.23.55 | host-4-23-55.host.udel.edu | 0 | | |
| 128.4.23.56 | rls1.engg.udel.edu | 0 | | |
| 128.4.23.57 | rls2.engg.udel.edu | 0 | | |
| 128.4.23.58 | webform.engg.udel.edu | 0 | | |
| 128.4.23.59 | host-4-23-59.host.udel.edu | 0 | | |
| 128.4.23.60 | comet.engg.udel.edu | 0 | | |
| 128.4.23.61 | host-4-23-61.host.udel.edu | 0 | | |
| 128.4.23.62 | rls3.engg.udel.edu | 0 | | |
| 128.4.23.63 | — | 0 | | |
| 128.4.23.64 | — | 0 | | |
| 128.4.23.65 | sw-nc01-7a-8-irb-459-sec1.nis.udel.edu | 0 | | |
| 128.4.23.66 | host-128-4-23-66.host.udel.edu | 0 | | |
| 128.4.23.67 | pulsar.engr.udel.edu | 0 | | |
| 128.4.23.68 | engr-commstore.engr.udel.edu | 0 | | |
| 128.4.23.69 | host-128-4-23-69.host.udel.edu | 0 | | |
| 128.4.23.70 | host-128-4-23-70.host.udel.edu | 0 | | |
| 128.4.23.71 | host-128-4-23-71.host.udel.edu | 0 | | |
| 128.4.23.72 | host-128-4-23-72.host.udel.edu | 0 | | |
| 128.4.23.73 | host-128-4-23-73.host.udel.edu | 0 | | |
| 128.4.23.74 | onyx.engr.udel.edu | 0 | | |
| 128.4.23.75 | host-128-4-23-75.host.udel.edu | 0 | | |
| 128.4.23.76 | solo.engr.udel.edu | 0 | | |
| 128.4.23.77 | host-4-23-77.host.udel.edu | 0 | | |
| 128.4.23.78 | host-128-4-23-78.host.udel.edu | 0 | | |
| 128.4.23.79 | host-128-4-23-79.host.udel.edu | 0 | | |
| 128.4.23.80 | host-128-4-23-80.host.udel.edu | 0 | | |
| 128.4.23.81 | engr-apptest-jk.win.udel.edu | 0 | | |
| 128.4.23.82 | host-128-4-23-82.host.udel.edu | 0 | | |
| 128.4.23.83 | host-128-4-23-83.host.udel.edu | 0 | | |
| 128.4.23.84 | host-128-4-23-84.host.udel.edu | 0 | | |
| 128.4.23.85 | host-128-4-23-85.host.udel.edu | 0 | | |
| 128.4.23.86 | host-128-4-23-86.host.udel.edu | 0 | | |
| 128.4.23.87 | quasar.engr.udel.edu | 0 | | |
| 128.4.23.88 | host-128-4-23-88.host.udel.edu | 0 | | |
| 128.4.23.89 | host-128-4-23-89.host.udel.edu | 0 | | |
| 128.4.23.90 | host-128-4-23-90.host.udel.edu | 0 | | |
| 128.4.23.91 | kylo.engr.udel.edu | 0 | | |
| 128.4.23.92 | laska.engr.udel.edu | 0 | | |
| 128.4.23.93 | host-4-23-93.host.udel.edu | 0 | | |
| 128.4.23.94 | manwe.engr.udel.edu | 0 | | |
| 128.4.23.95 | host-128-4-23-95.host.udel.edu | 0 | | |
| 128.4.23.96 | hub.engr.udel.edu | 0 | | |
| 128.4.23.97 | xylems.engr.udel.edu | 0 | | |
| 128.4.23.98 | host-128-4-23-98.host.udel.edu | 0 | | |
| 128.4.23.99 | host-128-4-23-99.host.udel.edu | 0 | | |
| 128.4.23.100 | host-128-4-23-100.host.udel.edu | 0 | | |
| 128.4.23.101 | tardis.engr.udel.edu | 0 | | |
| 128.4.23.102 | host-128-4-23-102.host.udel.edu | 0 | | |
| 128.4.23.103 | host-128-4-23-103.host.udel.edu | 0 | | |
| 128.4.23.104 | host-128-4-23-104.host.udel.edu | 0 | | |
| 128.4.23.105 | engr-tardis.win.udel.edu | 0 | | |
| 128.4.23.106 | engr-verde01.engr.udel.edu | 0 | | |
| 128.4.23.107 | host-128-4-23-107.host.udel.edu | 0 | | |
| 128.4.23.108 | host-128-4-23-108.host.udel.edu | 0 | | |
| 128.4.23.109 | host-128-4-23-109.host.udel.edu | 0 | | |
| 128.4.23.110 | host-128-4-23-110.host.udel.edu | 0 | | |
| 128.4.23.111 | host-128-4-23-111.host.udel.edu | 0 | | |
| 128.4.23.112 | host-128-4-23-112.host.udel.edu | 0 | | |
| 128.4.23.113 | host-128-4-23-113.host.udel.edu | 0 | | |
| 128.4.23.114 | host-128-4-23-114.host.udel.edu | 0 | | |
| 128.4.23.115 | host-128-4-23-115.host.udel.edu | 0 | | |
| 128.4.23.116 | host-128-4-23-116.host.udel.edu | 0 | | |
| 128.4.23.117 | host-128-4-23-117.host.udel.edu | 0 | | |
| 128.4.23.118 | host-128-4-23-118.host.udel.edu | 0 | | |
| 128.4.23.119 | host-128-4-23-119.host.udel.edu | 0 | | |
| 128.4.23.120 | host-128-4-23-120.host.udel.edu | 0 | | |
| 128.4.23.121 | host-128-4-23-121.host.udel.edu | 0 | | |
| 128.4.23.122 | host-128-4-23-122.host.udel.edu | 0 | | |
| 128.4.23.123 | host-128-4-23-123.host.udel.edu | 0 | | |
| 128.4.23.124 | host-128-4-23-124.host.udel.edu | 0 | | |
| 128.4.23.125 | host-128-4-23-125.host.udel.edu | 0 | | |
| 128.4.23.126 | host-128-4-23-126.host.udel.edu | 0 | | |
| 128.4.23.127 | — | 0 | | |
| 128.4.23.128 | — | 0 | | |
| 128.4.23.129 | sw-ne37-110-11-irb-471-sec1.nis.udel.edu | 0 | | |
| 128.4.23.130 | engr-chpstore01.engr.udel.edu | 0 | | |
| 128.4.23.131 | chpfw01.engr.udel.edu | 0 | | |
| 128.4.23.132 | host-128-4-23-132.host.udel.edu | 0 | | |
| 128.4.23.133 | host-128-4-23-133.host.udel.edu | 0 | | |
| 128.4.23.134 | engr-appa-hub1w.win.udel.edu | 0 | | |
| 128.4.23.135 | engr-appa-hub3w.win.udel.edu | 0 | | |
| 128.4.23.136 | engr-efsprime01.win.udel.edu | 0 | | |
| 128.4.23.137 | engr-efsprime02.win.udel.edu | 0 | | |
| 128.4.23.138 | dev.appsanywhere.engr.udel.edu | 0 | | |
| 128.4.23.139 | engr-sassafras2.engr.udel.edu | 0 | | |
| 128.4.23.140 | host-128-4-23-140.host.udel.edu | 0 | | |
| 128.4.23.141 | host-128-4-23-141.host.udel.edu | 0 | | |
| 128.4.23.142 | host-128-4-23-142.host.udel.edu | 0 | | |
| 128.4.23.143 | host-128-4-23-143.host.udel.edu | 0 | | |
| 128.4.23.144 | host-128-4-23-144.host.udel.edu | 0 | | |
| 128.4.23.145 | host-128-4-23-145.host.udel.edu | 0 | | |
| 128.4.23.146 | jmbubuntuvm.win.udel.edu | 0 | | |
| 128.4.23.147 | engg-dc-02.engg.udel.edu | 0 | | |
| 128.4.23.148 | engr-chp-san01r.engr.udel.edu | 0 | | |
| 128.4.23.149 | engr-chp-san01.engr.udel.edu | 0 | | |
| 128.4.23.150 | engr-kumo-brk01.win.udel.edu | 0 | | |
| 128.4.23.151 | engr-appj-adm01.win.udel.edu | 0 | | |
| 128.4.23.152 | host-4-23-152.host.udel.edu | 0 | | |
| 128.4.23.153 | engr-appj-str01.win.udel.edu | 0 | | |
| 128.4.23.154 | engr-db01.win.udel.edu | 0 | | |
| 128.4.23.155 | engr-appj-test.win.udel.edu | 0 | | |
| 128.4.23.156 | engr-filesvr01.win.udel.edu | 0 | | |
| 128.4.23.157 | engr-appj-rdh01.win.udel.edu | 0 | | |
| 128.4.23.158 | engr-appj-rdb01.win.udel.edu | 0 | | |
| 128.4.23.159 | engr-scanner02.win.udel.edu | 0 | | |
| 128.4.23.160 | engr-ecalc-db01.win.udel.edu | 0 | | |
| 128.4.23.161 | engr-chp-nat01.engr.udel.edu | 0 | | |
| 128.4.23.162 | engr-chp-nat02.engr.udel.edu | 0 | | |
| 128.4.23.163 | engr-chp-nat03.engr.udel.edu | 0 | | |
| 128.4.23.164 | host-4-23-164.host.udel.edu | 0 | | |
| 128.4.23.165 | engr-appj-adm03.win.udel.edu | 0 | | |
| 128.4.23.166 | host-4-23-166.host.udel.edu | 0 | | |
| 128.4.23.167 | engr-appj-str03.win.udel.edu | 0 | | |
| 128.4.23.168 | host-4-23-168.host.udel.edu | 0 | | |
| 128.4.23.169 | host-4-23-169.host.udel.edu | 0 | | |
| 128.4.23.170 | engr-chp-san02.engr.udel.edu | 0 | | |
| 128.4.23.171 | engr-chp-san02r.engr.udel.edu | 0 | | |
| 128.4.23.172 | engr-codemeterlm.win.udel.edu | 0 | | |
| 128.4.23.173 | engr-scanner03.win.udel.edu | 0 | | |
| 128.4.23.174 | engr-printsvr01.win.udel.edu | 0 | | |
| 128.4.23.175 | engr-sconnect02.win.udel.edu | 0 | | |
| 128.4.23.176 | engr-proxy01.engr.udel.edu | 0 | | |
| 128.4.23.177 | m1-c7.engr.udel.edu | 0 | | |
| 128.4.23.178 | host-4-23-178.host.udel.edu | 0 | | |
| 128.4.23.179 | engr-chp-tgc01.engr.udel.edu | 0 | | |
| 128.4.23.180 | host-128-4-23-180.host.udel.edu | 0 | | |
| 128.4.23.181 | engr-jsd01.win.udel.edu | 0 | | |
| 128.4.23.182 | engr-bu01.win.udel.edu | 0 | | |
| 128.4.23.183 | engr-chp-ting01.engr.udel.edu | 0 | | |
| 128.4.23.184 | engr-jirasd01.win.udel.edu | 0 | | |
| 128.4.23.185 | engr-confluen01.win.udel.edu | 0 | | |
| 128.4.23.186 | engr-aduc-01.win.udel.edu | 0 | | |
| 128.4.23.187 | m1-r9.engr.udel.edu | 0 | | |
| 128.4.23.188 | engr-primadb01.win.udel.edu | 0 | | |
| 128.4.23.189 | host-128-4-23-189.host.udel.edu | 0 | | |
| 128.4.23.190 | engr-rdbroker01.win.udel.edu | 0 | | |
| 128.4.23.191 | engr-rdsh01.win.udel.edu | 0 | | |
| 128.4.23.192 | engr-filesvr03.win.udel.edu | 0 | | |
| 128.4.23.193 | engr-rdsh03.win.udel.edu | 0 | | |
| 128.4.23.194 | engr-unite01.win.udel.edu | 0 | | |
| 128.4.23.195 | engr-ls-vmodflow.win.udel.edu | 0 | | |
| 128.4.23.196 | jmbwinvm.engr.udel.edu | 0 | | |
| 128.4.23.197 | host-128-4-23-197.host.udel.edu | 0 | | |
| 128.4.23.198 | host-128-4-23-198.host.udel.edu | 0 | | |
| 128.4.23.199 | host-128-4-23-199.host.udel.edu | 0 | | |
| 128.4.23.200 | engr-aahub1-300.engr.udel.edu | 0 | | |
| 128.4.23.201 | engr-aahub2-300.engr.udel.edu | 0 | | |
| 128.4.23.202 | engr-aahub1.engr.udel.edu | 0 | | |
| 128.4.23.203 | engr-aahub2.engr.udel.edu | 0 | | |
| 128.4.23.204 | engr-traumacad1.win.udel.edu | 0 | | |
| 128.4.23.205 | engr-aadata-a.engr.udel.edu | 0 | | |
| 128.4.23.206 | engr-aadata-b.engr.udel.edu | 0 | | |
| 128.4.23.207 | engr-rdsh02.win.udel.edu | 0 | | |
| 128.4.23.208 | engr-rdsh04.win.udel.edu | 0 | | |
| 128.4.23.209 | engr-apps-adm01.win.udel.edu | 0 | | |
| 128.4.23.210 | engr-apps-adm02.win.udel.edu | 0 | | |
| 128.4.23.211 | engr-apps-str01.win.udel.edu | 0 | | |
| 128.4.23.212 | engr-apps-str02.win.udel.edu | 0 | | |
| 128.4.23.213 | engr-apps-web01.win.udel.edu | 0 | | |
| 128.4.23.214 | engr-apps-web02.win.udel.edu | 0 | | |
| 128.4.23.215 | engr-apps-test.win.udel.edu | 0 | | |
| 128.4.23.216 | engr-apps-data1.win.udel.edu | 0 | | |
| 128.4.23.217 | ecalc-ras-gw1.win.udel.edu | 0 | | |
| 128.4.23.218 | host-128-4-23-218.host.udel.edu | 0 | | |
| 128.4.23.219 | host-128-4-23-219.host.udel.edu | 0 | | |
| 128.4.23.220 | host-128-4-23-220.host.udel.edu | 0 | | |
| 128.4.23.221 | engr-spl-nat01.engr.udel.edu | 0 | | |
| 128.4.23.222 | engr-spl-nat02.engr.udel.edu | 0 | | |
| 128.4.23.223 | engr-spl-nat03.engr.udel.edu | 0 | | |
| 128.4.23.224 | spore.win.udel.edu | 0 | | |
| 128.4.23.225 | host-128-4-23-225.host.udel.edu | 0 | | |
| 128.4.23.226 | host-128-4-23-226.host.udel.edu | 0 | | |
| 128.4.23.227 | host-128-4-23-227.host.udel.edu | 0 | | |
| 128.4.23.228 | host-128-4-23-228.host.udel.edu | 0 | | |
| 128.4.23.229 | host-128-4-23-229.host.udel.edu | 0 | | |
| 128.4.23.230 | host-4-23-230.host.udel.edu | 0 | | |
| 128.4.23.231 | host-4-23-231.host.udel.edu | 0 | | |
| 128.4.23.232 | host-4-23-232.host.udel.edu | 0 | | |
| 128.4.23.233 | host-4-23-233.host.udel.edu | 0 | | |
| 128.4.23.234 | host-128-4-23-234.host.udel.edu | 0 | | |
| 128.4.23.235 | host-128-4-23-235.host.udel.edu | 0 | | |
| 128.4.23.236 | host-128-4-23-236.host.udel.edu | 0 | | |
| 128.4.23.237 | host-128-4-23-237.host.udel.edu | 0 | | |
| 128.4.23.238 | engr-afs01.win.udel.edu | 0 | | |
| 128.4.23.239 | host-128-4-23-239.host.udel.edu | 0 | | |
| 128.4.23.240 | host-128-4-23-240.host.udel.edu | 0 | | |
| 128.4.23.241 | host-128-4-23-241.host.udel.edu | 0 | | |
| 128.4.23.242 | host-128-4-23-242.host.udel.edu | 0 | | |
| 128.4.23.243 | host-128-4-23-243.host.udel.edu | 0 | | |
| 128.4.23.244 | host-128-4-23-244.host.udel.edu | 0 | | |
| 128.4.23.245 | host-4-23-245.host.udel.edu | 0 | | |
| 128.4.23.246 | host-4-23-246.host.udel.edu | 0 | | |
| 128.4.23.247 | host-4-23-247.host.udel.edu | 0 | | |
| 128.4.23.248 | host-4-23-248.host.udel.edu | 0 | | |
| 128.4.23.249 | host-128-4-23-249.host.udel.edu | 0 | | |
| 128.4.23.250 | host-128-4-23-250.host.udel.edu | 0 | | |
| 128.4.23.251 | host-128-4-23-251.host.udel.edu | 0 | | |
| 128.4.23.252 | host-128-4-23-252.host.udel.edu | 0 | | |
| 128.4.23.253 | host-4-23-253.host.udel.edu | 0 | | |
| 128.4.23.254 | host-128-4-23-254.host.udel.edu | 0 | | |
| 128.4.23.255 | — | 0 | | |
Traceroute
Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.
$
traceroute -a -n -q1 -m14 128.4.23.232
traceroute to 128.4.23.232 (128.4.23.232): 14 hops max, 52 byte packets
2 *
3 *
5 *
6 *
7 *
12 *
13 *
14 *
Measurement taken from 
IPinfo ProbeNet in Boise, US
IPinfo ProbeNet in Boise, USOn