AS1 8.253.240.0/21 CIDR and IP Range Summary.ASN: 1 - Level 3 Parent LLCHost Count: 2046Addressable IPs: 20488.253.240.0/248.253.241.0/248.253.242.0/248.253.243.0/248.253.244.0/248.253.245.0/248.253.246.0/248.253.247.0/24