/19 Subnet
A /19 has 8,192 addresses, 8,190 of them usable by hosts. Its netmask is 255.255.224.0. Enter any address below to see its /19 network.
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Examples:
IPv4 network
8,190 usable hosts · 192.168.0.1 to 192.168.31.254
Details
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/19 at a glance
A /19 fixes the first 19 bits of the address as the network and leaves 13 bits for hosts, so it holds 2^13 = 8,192 addresses. The first is the network address and the last is the broadcast address, leaving 8,190 for hosts.
A /19 is 32 /24 networks side by side; registries and ISPs allocate blocks this size to networks that route them on the internet.
A /19 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 /19?
What is the subnet mask for /19?
How many /24 networks are in a /19?
Is 255.255.224.0 the same as /19?
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