online CIDR and IP subnet calculator : Check host

81.198.74.0-81.198.75.255
81.198.74.0/23

81.198.76.0-81.198.79.255
81.198.76.0/22

81.198.80.0-81.198.95.255
81.198.80.0/20

81.198.96.0-81.198.127.255
81.198.96.0/19

81.198.128.0-81.198.159.255
81.198.128.0/19

81.198.160.0-81.198.163.255
81.198.160.0/22

81.198.164.0-81.198.165.255
81.198.164.0/23

IP subnet calculator 81.198.74.0-81.198.165.255