AS25993 198.228.248.0/21 CIDR and IP Range Summary.ASN: 25993 - AT&T Labs Inc.Host Count: 2046Addressable IPs: 2048198.228.248.0/24198.228.249.0/24198.228.250.0/24198.228.251.0/24198.228.252.0/24198.228.253.0/24198.228.254.0/24198.228.255.0/24