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IPv4 Subnet Calculator

Enter an IP with a CIDR prefix or a subnet mask to see its network, broadcast, host range, and host count. You can also split the network into smaller subnets.

$ ipcalc
Try:192.168.1.10/2410.0.0.0/8172.16.5.4/20203.0.113.9/29
IPv6 calculator →
private IP (RFC 1918)10.92.0.0/17
network10.92.0.0/17
broadcast10.92.127.255
first host10.92.0.1
last host10.92.127.254
subnet mask255.255.128.0
wildcard0.0.127.255
addresses32,768
usable hosts32,766
classA
ipcalc 10.92.0.0/17
address00001010.01011100.00000000.00000000
subnet mask11111111.11111111.10000000.00000000
network00001010.01011100.00000000.00000000
broadcast00001010.01011100.01111111.11111111
green = network part, grey = host part
hex0x0a5c0000
decimal173801472
reverse dns0.0.92.10.in-addr.arpa
ipv4-mapped::ffff:a5c:0

/17 split into /23 · 64 subnets

close ×
#networkhost rangebroadcast
110.92.0.0/2310.92.0.1 – 10.92.1.25410.92.1.255
210.92.2.0/2310.92.2.1 – 10.92.3.25410.92.3.255
310.92.4.0/2310.92.4.1 – 10.92.5.25410.92.5.255
410.92.6.0/2310.92.6.1 – 10.92.7.25410.92.7.255
510.92.8.0/2310.92.8.1 – 10.92.9.25410.92.9.255
610.92.10.0/2310.92.10.1 – 10.92.11.25410.92.11.255
710.92.12.0/2310.92.12.1 – 10.92.13.25410.92.13.255
810.92.14.0/2310.92.14.1 – 10.92.15.25410.92.15.255
910.92.16.0/2310.92.16.1 – 10.92.17.25410.92.17.255
1010.92.18.0/2310.92.18.1 – 10.92.19.25410.92.19.255
1110.92.20.0/2310.92.20.1 – 10.92.21.25410.92.21.255
1210.92.22.0/2310.92.22.1 – 10.92.23.25410.92.23.255
1310.92.24.0/2310.92.24.1 – 10.92.25.25410.92.25.255
1410.92.26.0/2310.92.26.1 – 10.92.27.25410.92.27.255
1510.92.28.0/2310.92.28.1 – 10.92.29.25410.92.29.255
1610.92.30.0/2310.92.30.1 – 10.92.31.25410.92.31.255
1710.92.32.0/2310.92.32.1 – 10.92.33.25410.92.33.255
1810.92.34.0/2310.92.34.1 – 10.92.35.25410.92.35.255
1910.92.36.0/2310.92.36.1 – 10.92.37.25410.92.37.255
2010.92.38.0/2310.92.38.1 – 10.92.39.25410.92.39.255
2110.92.40.0/2310.92.40.1 – 10.92.41.25410.92.41.255
2210.92.42.0/2310.92.42.1 – 10.92.43.25410.92.43.255
2310.92.44.0/2310.92.44.1 – 10.92.45.25410.92.45.255
2410.92.46.0/2310.92.46.1 – 10.92.47.25410.92.47.255
2510.92.48.0/2310.92.48.1 – 10.92.49.25410.92.49.255
2610.92.50.0/2310.92.50.1 – 10.92.51.25410.92.51.255
2710.92.52.0/2310.92.52.1 – 10.92.53.25410.92.53.255
2810.92.54.0/2310.92.54.1 – 10.92.55.25410.92.55.255
2910.92.56.0/2310.92.56.1 – 10.92.57.25410.92.57.255
3010.92.58.0/2310.92.58.1 – 10.92.59.25410.92.59.255
3110.92.60.0/2310.92.60.1 – 10.92.61.25410.92.61.255
3210.92.62.0/2310.92.62.1 – 10.92.63.25410.92.63.255
3310.92.64.0/2310.92.64.1 – 10.92.65.25410.92.65.255
3410.92.66.0/2310.92.66.1 – 10.92.67.25410.92.67.255
3510.92.68.0/2310.92.68.1 – 10.92.69.25410.92.69.255
3610.92.70.0/2310.92.70.1 – 10.92.71.25410.92.71.255
3710.92.72.0/2310.92.72.1 – 10.92.73.25410.92.73.255
3810.92.74.0/2310.92.74.1 – 10.92.75.25410.92.75.255
3910.92.76.0/2310.92.76.1 – 10.92.77.25410.92.77.255
4010.92.78.0/2310.92.78.1 – 10.92.79.25410.92.79.255
4110.92.80.0/2310.92.80.1 – 10.92.81.25410.92.81.255
4210.92.82.0/2310.92.82.1 – 10.92.83.25410.92.83.255
4310.92.84.0/2310.92.84.1 – 10.92.85.25410.92.85.255
4410.92.86.0/2310.92.86.1 – 10.92.87.25410.92.87.255
4510.92.88.0/2310.92.88.1 – 10.92.89.25410.92.89.255
4610.92.90.0/2310.92.90.1 – 10.92.91.25410.92.91.255
4710.92.92.0/2310.92.92.1 – 10.92.93.25410.92.93.255
4810.92.94.0/2310.92.94.1 – 10.92.95.25410.92.95.255
4910.92.96.0/2310.92.96.1 – 10.92.97.25410.92.97.255
5010.92.98.0/2310.92.98.1 – 10.92.99.25410.92.99.255
5110.92.100.0/2310.92.100.1 – 10.92.101.25410.92.101.255
5210.92.102.0/2310.92.102.1 – 10.92.103.25410.92.103.255
5310.92.104.0/2310.92.104.1 – 10.92.105.25410.92.105.255
5410.92.106.0/2310.92.106.1 – 10.92.107.25410.92.107.255
5510.92.108.0/2310.92.108.1 – 10.92.109.25410.92.109.255
5610.92.110.0/2310.92.110.1 – 10.92.111.25410.92.111.255
5710.92.112.0/2310.92.112.1 – 10.92.113.25410.92.113.255
5810.92.114.0/2310.92.114.1 – 10.92.115.25410.92.115.255
5910.92.116.0/2310.92.116.1 – 10.92.117.25410.92.117.255
6010.92.118.0/2310.92.118.1 – 10.92.119.25410.92.119.255
6110.92.120.0/2310.92.120.1 – 10.92.121.25410.92.121.255
6210.92.122.0/2310.92.122.1 – 10.92.123.25410.92.123.255
6310.92.124.0/2310.92.124.1 – 10.92.125.25410.92.125.255
6410.92.126.0/2310.92.126.1 – 10.92.127.25410.92.127.255
01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefixsubnet maskaddresseshostsin your /17
/00.0.0.04,294,967,2964,294,967,294-
/1128.0.0.02,147,483,6482,147,483,646-
/2192.0.0.01,073,741,8241,073,741,822-
/3224.0.0.0536,870,912536,870,910-
/4240.0.0.0268,435,456268,435,454-
/5248.0.0.0134,217,728134,217,726-
/6252.0.0.067,108,86467,108,862-
/7254.0.0.033,554,43233,554,430-
/8255.0.0.016,777,21616,777,214-
/9255.128.0.08,388,6088,388,606-
/10255.192.0.04,194,3044,194,302-
/11255.224.0.02,097,1522,097,150-
/12255.240.0.01,048,5761,048,574-
/13255.248.0.0524,288524,286-
/14255.252.0.0262,144262,142-
/15255.254.0.0131,072131,070-
/16255.255.0.065,53665,534-
/17255.255.128.032,76832,7661
/18255.255.192.016,38416,3822 split →
/19255.255.224.08,1928,1904 split →
/20255.255.240.04,0964,0948 split →
/21255.255.248.02,0482,04616 split →
/22255.255.252.01,0241,02232 split →
/23255.255.254.051251064 split →
/24255.255.255.0256254128 split →
/25255.255.255.128128126256 split →
/26255.255.255.1926462512 split →
/27255.255.255.22432301,024 split →
/28255.255.255.24016142,048 split →
/29255.255.255.248864,096 split →
/30255.255.255.252428,192 split →
/31255.255.255.2542216,384 split →
/32255.255.255.2551132,768 split →
02 / faq

About this calculator.

How do I use this subnet calculator?

▼

Type an IP address followed by a prefix, like 192.168.1.10/24, or by a subnet mask, like 192.168.1.10 255.255.255.0. Without a prefix it uses /24. Click a row in the table to split the network into smaller subnets.

Why are usable hosts always 2 fewer?

▼

The first address in a subnet is the network address and the last is the broadcast address, so neither can go to a device. The exceptions are /31 (point-to-point links, RFC 3021) and /32 (a single address), which use every address.

Can I use it from a terminal?

▼

Yes. curl 'ipku.in/en/tools/ipv4-subnet-calculator?q=192.168.1.10/24' returns the result as plain text.

Learn how to work it out →