AS54040 50.228.144.0/20 CIDR and IP Range Summary.ASN: 54040 - NBCUniversalHost Count: 4094Addressable IPs: 409650.228.144.0/2450.228.145.0/2450.228.146.0/2450.228.147.0/2450.228.148.0/2450.228.149.0/2450.228.150.0/2450.228.151.0/2450.228.152.0/2450.228.153.0/2450.228.154.0/2450.228.155.0/2450.228.156.0/2450.228.157.0/2450.228.158.0/2450.228.159.0/24