AS1 8.3.16.0/21 CIDR and IP Range Summary.ASN: 1 - Level 3 Parent LLCHost Count: 2046Addressable IPs: 20488.3.16.0/248.3.17.0/248.3.18.0/248.3.19.0/248.3.20.0/248.3.21.0/248.3.22.0/248.3.23.0/24