AS63 129.55.21.0/24 CIDR and IP Range Summary.ASN: 63 - Massachusetts Institute of TechnologyHost Count: 254Addressable IPs: 256 129.55.21.0129.55.21.1129.55.21.2129.55.21.3129.55.21.4129.55.21.5129.55.21.6129.55.21.7129.55.21.8129.55.21.9129.55.21.10129.55.21.11129.55.21.12129.55.21.13129.55.21.14129.55.21.15129.55.21.16129.55.21.17129.55.21.18129.55.21.19129.55.21.20129.55.21.21129.55.21.22129.55.21.23129.55.21.24129.55.21.25129.55.21.26129.55.21.27129.55.21.28129.55.21.29129.55.21.30129.55.21.31129.55.21.32129.55.21.33129.55.21.34129.55.21.35129.55.21.36129.55.21.37129.55.21.38129.55.21.39129.55.21.40129.55.21.41129.55.21.42129.55.21.43129.55.21.44129.55.21.45129.55.21.46129.55.21.47129.55.21.48129.55.21.49129.55.21.50129.55.21.51129.55.21.52129.55.21.53129.55.21.54129.55.21.55129.55.21.56129.55.21.57129.55.21.58129.55.21.59129.55.21.60129.55.21.61129.55.21.62129.55.21.63129.55.21.64129.55.21.65129.55.21.66129.55.21.67129.55.21.68129.55.21.69129.55.21.70129.55.21.71129.55.21.72129.55.21.73129.55.21.74129.55.21.75129.55.21.76129.55.21.77129.55.21.78129.55.21.79129.55.21.80129.55.21.81129.55.21.82129.55.21.83129.55.21.84129.55.21.85129.55.21.86129.55.21.87129.55.21.88129.55.21.89129.55.21.90129.55.21.91129.55.21.92129.55.21.93129.55.21.94129.55.21.95129.55.21.96129.55.21.97129.55.21.98129.55.21.99129.55.21.100129.55.21.101129.55.21.102129.55.21.103129.55.21.104129.55.21.105129.55.21.106129.55.21.107129.55.21.108129.55.21.109129.55.21.110129.55.21.111129.55.21.112129.55.21.113129.55.21.114129.55.21.115129.55.21.116129.55.21.117129.55.21.118129.55.21.119129.55.21.120129.55.21.121129.55.21.122129.55.21.123129.55.21.124129.55.21.125129.55.21.126129.55.21.127129.55.21.128129.55.21.129129.55.21.130129.55.21.131129.55.21.132129.55.21.133129.55.21.134129.55.21.135129.55.21.136129.55.21.137129.55.21.138129.55.21.139129.55.21.140129.55.21.141129.55.21.142129.55.21.143129.55.21.144129.55.21.145129.55.21.146129.55.21.147129.55.21.148129.55.21.149129.55.21.150129.55.21.151129.55.21.152129.55.21.153129.55.21.154129.55.21.155129.55.21.156129.55.21.157129.55.21.158129.55.21.159129.55.21.160129.55.21.161129.55.21.162129.55.21.163129.55.21.164129.55.21.165129.55.21.166129.55.21.167129.55.21.168129.55.21.169129.55.21.170129.55.21.171129.55.21.172129.55.21.173129.55.21.174129.55.21.175129.55.21.176129.55.21.177129.55.21.178129.55.21.179129.55.21.180129.55.21.181129.55.21.182129.55.21.183129.55.21.184129.55.21.185129.55.21.186129.55.21.187129.55.21.188129.55.21.189129.55.21.190129.55.21.191129.55.21.192129.55.21.193129.55.21.194129.55.21.195129.55.21.196129.55.21.197129.55.21.198129.55.21.199129.55.21.200129.55.21.201129.55.21.202129.55.21.203129.55.21.204129.55.21.205129.55.21.206129.55.21.207129.55.21.208129.55.21.209129.55.21.210129.55.21.211129.55.21.212129.55.21.213129.55.21.214129.55.21.215129.55.21.216129.55.21.217129.55.21.218129.55.21.219129.55.21.220129.55.21.221129.55.21.222129.55.21.223129.55.21.224129.55.21.225129.55.21.226129.55.21.227129.55.21.228129.55.21.229129.55.21.230129.55.21.231129.55.21.232129.55.21.233129.55.21.234129.55.21.235129.55.21.236129.55.21.237129.55.21.238129.55.21.239129.55.21.240129.55.21.241129.55.21.242129.55.21.243129.55.21.244129.55.21.245129.55.21.246129.55.21.247129.55.21.248129.55.21.249129.55.21.250129.55.21.251129.55.21.252129.55.21.253129.55.21.254129.55.21.255