AS30821 193.183.144.0/21 CIDR and IP Range Summary.ASN: 30821 - H & M Hennes & Mauritz GBC ABHost Count: 2046Addressable IPs: 2048193.183.144.0/24193.183.145.0/24193.183.146.0/24193.183.147.0/24193.183.148.0/24193.183.149.0/24193.183.150.0/24193.183.151.0/24