AS199163 81.91.16.0/21 CIDR and IP Range Summary.ASN: 199163 - DATAGROUP Operations GmbHHost Count: 2046Addressable IPs: 204881.91.16.0/2481.91.17.0/2481.91.18.0/2481.91.19.0/2481.91.20.0/2481.91.21.0/2481.91.22.0/2481.91.23.0/24