/15 Subnet
A /15 has 131,072 addresses, 131,070 of them usable by hosts. Its netmask is 255.254.0.0. Enter any address below to see its /15 network.
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Examples:
IPv4 network
131,070 usable hosts · 10.0.0.1 to 10.1.255.254
Details
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/15 at a glance
A /15 fixes the first 15 bits of the address as the network and leaves 17 bits for hosts, so it holds 2^17 = 131,072 addresses. The first is the network address and the last is the broadcast address, leaving 131,070 for hosts.
A /15 is 512 /24 networks side by side; registries and ISPs allocate blocks this size to networks that route them on the internet.
A /15 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 /15?
What is the subnet mask for /15?
How many /24 networks are in a /15?
Is 255.254.0.0 the same as /15?
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