CIDR / Subnet Calculator
Network • Broadcast • Range • Hosts
Results
Subnet Mask
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Wildcard Mask
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Network Address
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Broadcast Address
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First Usable
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Last Usable
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Total IPs
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Usable IPs
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Notes: /31 has 2 usable addresses (RFC 3021). /32 represents a single host route.
CIDR (IPv4)
Tip: If you enter only an IP, default is /24.
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