AS12255 138.133.208.0/20 CIDR and IP Range Summary.ASN: 12255 - Amgen Inc.Host Count: 4094Addressable IPs: 4096138.133.208.0/24138.133.209.0/24138.133.210.0/24138.133.211.0/24138.133.212.0/24138.133.213.0/24138.133.214.0/24138.133.215.0/24138.133.216.0/24138.133.217.0/24138.133.218.0/24138.133.219.0/24138.133.220.0/24138.133.221.0/24138.133.222.0/24138.133.223.0/24