/11 Subnet
A /11 has 2,097,152 addresses, 2,097,150 of them usable by hosts. Its netmask is 255.224.0.0. Enter any address below to see its /11 network.
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Examples:
IPv4 network
2,097,150 usable hosts · 10.0.0.1 to 10.31.255.254
Details
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/11 at a glance
A /11 fixes the first 11 bits of the address as the network and leaves 21 bits for hosts, so it holds 2^21 = 2,097,152 addresses. The first is the network address and the last is the broadcast address, leaving 2,097,150 for hosts.
A /11 is 8,192 /24 networks side by side; registries and ISPs allocate blocks this size to networks that route them on the internet.
A /11 can be announced in BGP on its own: /24 is the longest prefix most networks accept.
Questions
How many usable IP addresses are in a /11?
What is the subnet mask for /11?
How many /24 networks are in a /11?
Is 255.224.0.0 the same as /11?
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