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Tools
Subnet Calculator
Subnet Calculator
IP Address:
CIDR / Subnet Mask:
/8 - 255.0.0.0
/16 - 255.255.0.0
/20 - 255.255.240.0
/24 - 255.255.255.0
/25 - 255.255.255.128
/26 - 255.255.255.192
/27 - 255.255.255.224
/28 - 255.255.255.240
/29 - 255.255.255.248
/30 - 255.255.255.252
Calculate
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Total Hosts
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Usable Hosts
Network Address
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Broadcast Address
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Subnet Mask
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Wildcard Mask
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First Usable IP
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Last Usable IP
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CIDR Notation
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IP Class
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Binary Subnet Mask
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