AS21668 198.251.40.0/21 CIDR and IP Range Summary.ASN: 21668 - ElbertonnetHost Count: 2046Addressable IPs: 2048198.251.40.0/24198.251.41.0/24198.251.42.0/24198.251.43.0/24198.251.44.0/24198.251.45.0/24198.251.46.0/24198.251.47.0/24