AS13768 209.15.56.0/21 CIDR and IP Range Summary.ASN: 13768 - Aptum TechnologiesHost Count: 2046Addressable IPs: 2048209.15.56.0/24209.15.57.0/24209.15.58.0/24209.15.59.0/24209.15.60.0/24209.15.61.0/24209.15.62.0/24209.15.63.0/24