AS15540 139.1.152.0/21 CIDR and IP Range Summary.ASN: 15540 - operational services GmbH & Co. KGHost Count: 2046Addressable IPs: 2048139.1.152.0/24139.1.153.0/24139.1.154.0/24139.1.155.0/24139.1.156.0/24139.1.157.0/24139.1.158.0/24139.1.159.0/24