IPv4 prefix

81.0.232.0/21

IP Prefix (CIDR): 81.0.232.0/21
Subnet Mask: 255.255.248.0
Address Count: 2,048
IP Range: 81.0.232.0 - 81.0.239.255
Subnet calculator: Calculate subnet details

Handle: CASABLANCA-RIPE-MNT
Country: Czechia (CZ)
Registry: RIPENCC
Registered Prefixes: 81.0.232.0/26 (81.0.232.0 - 81.0.232.63)
81.0.232.96/28 (81.0.232.96 - 81.0.232.111)
81.0.232.112/28 (81.0.232.112 - 81.0.232.127)
81.0.232.128/27 (81.0.232.128 - 81.0.232.159)
81.0.232.160/28 (81.0.232.160 - 81.0.232.175)
81.0.232.176/29 (81.0.232.176 - 81.0.232.183)
81.0.232.200/29 (81.0.232.200 - 81.0.232.207)
81.0.232.208/28 (81.0.232.208 - 81.0.232.223)
81.0.232.232/29 (81.0.232.232 - 81.0.232.239)
81.0.232.240/29 (81.0.232.240 - 81.0.232.247)
81.0.232.248/29 (81.0.232.248 - 81.0.232.255)
81.0.233.0/26 (81.0.233.0 - 81.0.233.63)
81.0.233.64/26 (81.0.233.64 - 81.0.233.127)
81.0.233.128/28 (81.0.233.128 - 81.0.233.143)
81.0.233.160/28 (81.0.233.160 - 81.0.233.175)
81.0.233.176/29 (81.0.233.176 - 81.0.233.183)
81.0.233.184/29 (81.0.233.184 - 81.0.233.191)
81.0.233.192/28 (81.0.233.192 - 81.0.233.207)
81.0.233.208/28 (81.0.233.208 - 81.0.233.223)
81.0.233.232/29 (81.0.233.232 - 81.0.233.239)
81.0.233.240/29 (81.0.233.240 - 81.0.233.247)
81.0.234.0/29 (81.0.234.0 - 81.0.234.7)
81.0.234.8/29 (81.0.234.8 - 81.0.234.15)
81.0.234.16/28 (81.0.234.16 - 81.0.234.31)
81.0.234.32/28 (81.0.234.32 - 81.0.234.47)
81.0.234.48/29 (81.0.234.48 - 81.0.234.55)
81.0.234.56/29 (81.0.234.56 - 81.0.234.63)
81.0.234.64/29 (81.0.234.64 - 81.0.234.71)
81.0.234.72/29 (81.0.234.72 - 81.0.234.79)
81.0.234.80/28 (81.0.234.80 - 81.0.234.95)
81.0.234.96/27 (81.0.234.96 - 81.0.234.127)
81.0.234.192/27 (81.0.234.192 - 81.0.234.223)
81.0.234.224/29 (81.0.234.224 - 81.0.234.231)
81.0.234.248/29 (81.0.234.248 - 81.0.234.255)
81.0.235.0/24 (81.0.235.0 - 81.0.235.255)
81.0.236.0/29 (81.0.236.0 - 81.0.236.7)
81.0.236.8/29 (81.0.236.8 - 81.0.236.15)
81.0.236.16/29 (81.0.236.16 - 81.0.236.23)
81.0.236.64/27 (81.0.236.64 - 81.0.236.95)
81.0.236.96/27 (81.0.236.96 - 81.0.236.127)
81.0.236.160/27 (81.0.236.160 - 81.0.236.191)
81.0.236.192/27 (81.0.236.192 - 81.0.236.223)
81.0.236.224/28 (81.0.236.224 - 81.0.236.239)
81.0.236.248/29 (81.0.236.248 - 81.0.236.255)
81.0.237.24/29 (81.0.237.24 - 81.0.237.31)
81.0.237.32/28 (81.0.237.32 - 81.0.237.47)
81.0.237.48/28 (81.0.237.48 - 81.0.237.63)
81.0.237.64/28 (81.0.237.64 - 81.0.237.79)
81.0.237.80/29 (81.0.237.80 - 81.0.237.87)
81.0.237.88/29 (81.0.237.88 - 81.0.237.95)
81.0.237.96/28 (81.0.237.96 - 81.0.237.111)
81.0.237.112/28 (81.0.237.112 - 81.0.237.127)
81.0.237.136/29 (81.0.237.136 - 81.0.237.143)
81.0.237.144/28 (81.0.237.144 - 81.0.237.159)
81.0.237.160/27 (81.0.237.160 - 81.0.237.191)
81.0.237.192/28 (81.0.237.192 - 81.0.237.207)
81.0.237.208/28 (81.0.237.208 - 81.0.237.223)
81.0.237.240/29 (81.0.237.240 - 81.0.237.247)
81.0.237.248/29 (81.0.237.248 - 81.0.237.255)
81.0.238.0/29 (81.0.238.0 - 81.0.238.7)
81.0.238.8/29 (81.0.238.8 - 81.0.238.15)
81.0.238.16/29 (81.0.238.16 - 81.0.238.23)
81.0.238.24/29 (81.0.238.24 - 81.0.238.31)
81.0.238.32/28 (81.0.238.32 - 81.0.238.47)
81.0.238.48/28 (81.0.238.48 - 81.0.238.63)
81.0.238.64/28 (81.0.238.64 - 81.0.238.79)
81.0.238.80/28 (81.0.238.80 - 81.0.238.95)
81.0.238.128/28 (81.0.238.128 - 81.0.238.143)
81.0.238.144/28 (81.0.238.144 - 81.0.238.159)
81.0.238.160/28 (81.0.238.160 - 81.0.238.175)
81.0.238.208/29 (81.0.238.208 - 81.0.238.215)
81.0.238.216/29 (81.0.238.216 - 81.0.238.223)
81.0.238.232/29 (81.0.238.232 - 81.0.238.239)
81.0.238.240/29 (81.0.238.240 - 81.0.238.247)
81.0.238.248/29 (81.0.238.248 - 81.0.238.255)
81.0.239.0/29 (81.0.239.0 - 81.0.239.7)
81.0.239.8/29 (81.0.239.8 - 81.0.239.15)
81.0.239.16/29 (81.0.239.16 - 81.0.239.23)
81.0.239.24/29 (81.0.239.24 - 81.0.239.31)
81.0.239.32/28 (81.0.239.32 - 81.0.239.47)
81.0.239.64/27 (81.0.239.64 - 81.0.239.95)
81.0.239.96/28 (81.0.239.96 - 81.0.239.111)
81.0.239.112/28 (81.0.239.112 - 81.0.239.127)
81.0.239.176/29 (81.0.239.176 - 81.0.239.183)
81.0.239.192/28 (81.0.239.192 - 81.0.239.207)
81.0.239.208/29 (81.0.239.208 - 81.0.239.215)
81.0.239.248/29 (81.0.239.248 - 81.0.239.255)
Delegated Prefix: 81.0.232.0/21 (81.0.232.0 - 81.0.239.255)

Announced Prefix	Relationship	Origin ASN	Description	Country	First Address	Last Address
81.0.232.0/21	Exact	AS15685	CASABLANCA INT a.s.	Czechia (CZ)	81.0.232.0	81.0.239.255