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/10 Subnet Mask

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A /10 subnet mask is 255.192.0.0, with 4,194,304 addresses and 4,194,302 usable hosts.

CIDR prefix/10
Subnet mask255.192.0.0
Subnet mask (binary)11111111.11000000.00000000.00000000
Wildcard mask0.63.255.255
Network bits / host bits10 / 22
Total addresses4,194,304
Usable hosts4,194,302
/10 subnets in a /84

The mask ends 2 bits into octet 2, so blocks step in increments of 64 in that octet.

Try it with an address

Example /10 subnets in 10.0.0.0/8

Network First usable host Last usable host Broadcast
10.0.0.0/10 10.0.0.1 10.63.255.254 10.63.255.255
10.64.0.0/10 10.64.0.1 10.127.255.254 10.127.255.255
10.128.0.0/10 10.128.0.1 10.191.255.254 10.191.255.255
10.192.0.0/10 10.192.0.1 10.255.255.254 10.255.255.255

Frequently asked questions

What is the subnet mask for /10?

A /10 subnet mask is 255.192.0.0. In binary that is 11111111.11000000.00000000.00000000: 10 network bits followed by 22 host bits. The wildcard mask is 0.63.255.255.

How many usable hosts are in a /10?

A /10 holds 4,194,304 addresses in total. Subtracting the network and broadcast addresses leaves 4,194,302 usable hosts.

How many /10 subnets fit in a /8?

A /8 divides into 4 subnets of size /10, because each extra mask bit doubles the number of subnets.

Other prefix lengths

← /9 Full CIDR chart /11 →

Calculate this over HTTP: curl https://networkcalc.com/api/ip/192.168.1.0/10. See the Subnet Calculator API.