AS30821 193.183.136.0/21 CIDR and IP Range Summary.ASN: 30821 - H & M Hennes & Mauritz GBC ABHost Count: 2046Addressable IPs: 2048193.183.136.0/24193.183.137.0/24193.183.138.0/24193.183.139.0/24193.183.140.0/24193.183.141.0/24193.183.142.0/24193.183.143.0/24