AS17231 206.16.200.0/21 CIDR and IP Range Summary.ASN: 17231 - AT&T Enhanced Network ServicesHost Count: 2046Addressable IPs: 2048206.16.200.0/24206.16.201.0/24206.16.202.0/24206.16.203.0/24206.16.204.0/24206.16.205.0/24206.16.206.0/24206.16.207.0/24