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/19 Subnet Mask

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A /19 subnet mask is 255.255.224.0, with 8,192 addresses and 8,190 usable hosts.

CIDR prefix/19
Subnet mask255.255.224.0
Subnet mask (binary)11111111.11111111.11100000.00000000
Wildcard mask0.0.31.255
Network bits / host bits19 / 13
Total addresses8,192
Usable hosts8,190
/19 subnets in a /82,048
/19 subnets in a /168

The mask ends 3 bits into octet 3, so blocks step in increments of 32 in that octet.

Try it with an address

Example /19 subnets in 192.168.0.0/16

Network First usable host Last usable host Broadcast
192.168.0.0/19 192.168.0.1 192.168.31.254 192.168.31.255
192.168.32.0/19 192.168.32.1 192.168.63.254 192.168.63.255
192.168.64.0/19 192.168.64.1 192.168.95.254 192.168.95.255
192.168.96.0/19 192.168.96.1 192.168.127.254 192.168.127.255
192.168.128.0/19 192.168.128.1 192.168.159.254 192.168.159.255
192.168.160.0/19 192.168.160.1 192.168.191.254 192.168.191.255
192.168.192.0/19 192.168.192.1 192.168.223.254 192.168.223.255
192.168.224.0/19 192.168.224.1 192.168.255.254 192.168.255.255

Frequently asked questions

What is the subnet mask for /19?

A /19 subnet mask is 255.255.224.0. In binary that is 11111111.11111111.11100000.00000000: 19 network bits followed by 13 host bits. The wildcard mask is 0.0.31.255.

How many usable hosts are in a /19?

A /19 holds 8,192 addresses in total. Subtracting the network and broadcast addresses leaves 8,190 usable hosts.

How many /19 subnets fit in a /16?

A /16 divides into 8 subnets of size /19, because each extra mask bit doubles the number of subnets.

Other prefix lengths

← /18 Full CIDR chart /20 →

Calculate this over HTTP: curl https://networkcalc.com/api/ip/192.168.1.0/19. See the Subnet Calculator API.