AS55 128.91.20.0/24 CIDR and IP Range Summary.ASN: 55 - University of PennsylvaniaHost Count: 254Addressable IPs: 256 128.91.20.0128.91.20.1128.91.20.2128.91.20.3128.91.20.4128.91.20.5128.91.20.6128.91.20.7128.91.20.8128.91.20.9128.91.20.10128.91.20.11128.91.20.12128.91.20.13128.91.20.14128.91.20.15128.91.20.16128.91.20.17128.91.20.18128.91.20.19128.91.20.20128.91.20.21128.91.20.22128.91.20.23128.91.20.24128.91.20.25128.91.20.26128.91.20.27128.91.20.28128.91.20.29128.91.20.30128.91.20.31128.91.20.32128.91.20.33128.91.20.34128.91.20.35128.91.20.36128.91.20.37128.91.20.38128.91.20.39128.91.20.40128.91.20.41128.91.20.42128.91.20.43128.91.20.44128.91.20.45128.91.20.46128.91.20.47128.91.20.48128.91.20.49128.91.20.50128.91.20.51128.91.20.52128.91.20.53128.91.20.54128.91.20.55128.91.20.56128.91.20.57128.91.20.58128.91.20.59128.91.20.60128.91.20.61128.91.20.62128.91.20.63128.91.20.64128.91.20.65128.91.20.66128.91.20.67128.91.20.68128.91.20.69128.91.20.70128.91.20.71128.91.20.72128.91.20.73128.91.20.74128.91.20.75128.91.20.76128.91.20.77128.91.20.78128.91.20.79128.91.20.80128.91.20.81128.91.20.82128.91.20.83128.91.20.84128.91.20.85128.91.20.86128.91.20.87128.91.20.88128.91.20.89128.91.20.90128.91.20.91128.91.20.92128.91.20.93128.91.20.94128.91.20.95128.91.20.96128.91.20.97128.91.20.98128.91.20.99128.91.20.100128.91.20.101128.91.20.102128.91.20.103128.91.20.104128.91.20.105128.91.20.106128.91.20.107128.91.20.108128.91.20.109128.91.20.110128.91.20.111128.91.20.112128.91.20.113128.91.20.114128.91.20.115128.91.20.116128.91.20.117128.91.20.118128.91.20.119128.91.20.120128.91.20.121128.91.20.122128.91.20.123128.91.20.124128.91.20.125128.91.20.126128.91.20.127128.91.20.128128.91.20.129128.91.20.130128.91.20.131128.91.20.132128.91.20.133128.91.20.134128.91.20.135128.91.20.136128.91.20.137128.91.20.138128.91.20.139128.91.20.140128.91.20.141128.91.20.142128.91.20.143128.91.20.144128.91.20.145128.91.20.146128.91.20.147128.91.20.148128.91.20.149128.91.20.150128.91.20.151128.91.20.152128.91.20.153128.91.20.154128.91.20.155128.91.20.156128.91.20.157128.91.20.158128.91.20.159128.91.20.160128.91.20.161128.91.20.162128.91.20.163128.91.20.164128.91.20.165128.91.20.166128.91.20.167128.91.20.168128.91.20.169128.91.20.170128.91.20.171128.91.20.172128.91.20.173128.91.20.174128.91.20.175128.91.20.176128.91.20.177128.91.20.178128.91.20.179128.91.20.180128.91.20.181128.91.20.182128.91.20.183128.91.20.184128.91.20.185128.91.20.186128.91.20.187128.91.20.188128.91.20.189128.91.20.190128.91.20.191128.91.20.192128.91.20.193128.91.20.194128.91.20.195128.91.20.196128.91.20.197128.91.20.198128.91.20.199128.91.20.200128.91.20.201128.91.20.202128.91.20.203128.91.20.204128.91.20.205128.91.20.206128.91.20.207128.91.20.208128.91.20.209128.91.20.210128.91.20.211128.91.20.212128.91.20.213128.91.20.214128.91.20.215128.91.20.216128.91.20.217128.91.20.218128.91.20.219128.91.20.220128.91.20.221128.91.20.222128.91.20.223128.91.20.224128.91.20.225128.91.20.226128.91.20.227128.91.20.228128.91.20.229128.91.20.230128.91.20.231128.91.20.232128.91.20.233128.91.20.234128.91.20.235128.91.20.236128.91.20.237128.91.20.238128.91.20.239128.91.20.240128.91.20.241128.91.20.242128.91.20.243128.91.20.244128.91.20.245128.91.20.246128.91.20.247128.91.20.248128.91.20.249128.91.20.250128.91.20.251128.91.20.252128.91.20.253128.91.20.254128.91.20.255