AS21549 216.229.144.0/21 CIDR and IP Range Summary.ASN: 21549 - Iron Mountain IncHost Count: 2046Addressable IPs: 2048216.229.144.0/24216.229.145.0/24216.229.146.0/24216.229.147.0/24216.229.148.0/24216.229.149.0/24216.229.150.0/24216.229.151.0/24