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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)10.0.0.0/11
network10.0.0.0/11
broadcast10.31.255.255
first host10.0.0.1
last host10.31.255.254
subnet mask255.224.0.0
wildcard0.31.255.255
addresses2,097,152
usable hosts2,097,150
classA
ipcalc 10.0.0.0/11
address00001010.00000000.00000000.00000000
subnet mask11111111.11100000.00000000.00000000
network00001010.00000000.00000000.00000000
broadcast00001010.00011111.11111111.11111111
green = network part, grey = host part
hex0x0a000000
decimal167772160
reverse dns0.0.0.10.in-addr.arpa
ipv4-mapped::ffff:a00:0

/11 split into /17 · 64 subnets

close ×
#networkhost rangebroadcast
110.0.0.0/1710.0.0.1 – 10.0.127.25410.0.127.255
210.0.128.0/1710.0.128.1 – 10.0.255.25410.0.255.255
310.1.0.0/1710.1.0.1 – 10.1.127.25410.1.127.255
410.1.128.0/1710.1.128.1 – 10.1.255.25410.1.255.255
510.2.0.0/1710.2.0.1 – 10.2.127.25410.2.127.255
610.2.128.0/1710.2.128.1 – 10.2.255.25410.2.255.255
710.3.0.0/1710.3.0.1 – 10.3.127.25410.3.127.255
810.3.128.0/1710.3.128.1 – 10.3.255.25410.3.255.255
910.4.0.0/1710.4.0.1 – 10.4.127.25410.4.127.255
1010.4.128.0/1710.4.128.1 – 10.4.255.25410.4.255.255
1110.5.0.0/1710.5.0.1 – 10.5.127.25410.5.127.255
1210.5.128.0/1710.5.128.1 – 10.5.255.25410.5.255.255
1310.6.0.0/1710.6.0.1 – 10.6.127.25410.6.127.255
1410.6.128.0/1710.6.128.1 – 10.6.255.25410.6.255.255
1510.7.0.0/1710.7.0.1 – 10.7.127.25410.7.127.255
1610.7.128.0/1710.7.128.1 – 10.7.255.25410.7.255.255
1710.8.0.0/1710.8.0.1 – 10.8.127.25410.8.127.255
1810.8.128.0/1710.8.128.1 – 10.8.255.25410.8.255.255
1910.9.0.0/1710.9.0.1 – 10.9.127.25410.9.127.255
2010.9.128.0/1710.9.128.1 – 10.9.255.25410.9.255.255
2110.10.0.0/1710.10.0.1 – 10.10.127.25410.10.127.255
2210.10.128.0/1710.10.128.1 – 10.10.255.25410.10.255.255
2310.11.0.0/1710.11.0.1 – 10.11.127.25410.11.127.255
2410.11.128.0/1710.11.128.1 – 10.11.255.25410.11.255.255
2510.12.0.0/1710.12.0.1 – 10.12.127.25410.12.127.255
2610.12.128.0/1710.12.128.1 – 10.12.255.25410.12.255.255
2710.13.0.0/1710.13.0.1 – 10.13.127.25410.13.127.255
2810.13.128.0/1710.13.128.1 – 10.13.255.25410.13.255.255
2910.14.0.0/1710.14.0.1 – 10.14.127.25410.14.127.255
3010.14.128.0/1710.14.128.1 – 10.14.255.25410.14.255.255
3110.15.0.0/1710.15.0.1 – 10.15.127.25410.15.127.255
3210.15.128.0/1710.15.128.1 – 10.15.255.25410.15.255.255
3310.16.0.0/1710.16.0.1 – 10.16.127.25410.16.127.255
3410.16.128.0/1710.16.128.1 – 10.16.255.25410.16.255.255
3510.17.0.0/1710.17.0.1 – 10.17.127.25410.17.127.255
3610.17.128.0/1710.17.128.1 – 10.17.255.25410.17.255.255
3710.18.0.0/1710.18.0.1 – 10.18.127.25410.18.127.255
3810.18.128.0/1710.18.128.1 – 10.18.255.25410.18.255.255
3910.19.0.0/1710.19.0.1 – 10.19.127.25410.19.127.255
4010.19.128.0/1710.19.128.1 – 10.19.255.25410.19.255.255
4110.20.0.0/1710.20.0.1 – 10.20.127.25410.20.127.255
4210.20.128.0/1710.20.128.1 – 10.20.255.25410.20.255.255
4310.21.0.0/1710.21.0.1 – 10.21.127.25410.21.127.255
4410.21.128.0/1710.21.128.1 – 10.21.255.25410.21.255.255
4510.22.0.0/1710.22.0.1 – 10.22.127.25410.22.127.255
4610.22.128.0/1710.22.128.1 – 10.22.255.25410.22.255.255
4710.23.0.0/1710.23.0.1 – 10.23.127.25410.23.127.255
4810.23.128.0/1710.23.128.1 – 10.23.255.25410.23.255.255
4910.24.0.0/1710.24.0.1 – 10.24.127.25410.24.127.255
5010.24.128.0/1710.24.128.1 – 10.24.255.25410.24.255.255
5110.25.0.0/1710.25.0.1 – 10.25.127.25410.25.127.255
5210.25.128.0/1710.25.128.1 – 10.25.255.25410.25.255.255
5310.26.0.0/1710.26.0.1 – 10.26.127.25410.26.127.255
5410.26.128.0/1710.26.128.1 – 10.26.255.25410.26.255.255
5510.27.0.0/1710.27.0.1 – 10.27.127.25410.27.127.255
5610.27.128.0/1710.27.128.1 – 10.27.255.25410.27.255.255
5710.28.0.0/1710.28.0.1 – 10.28.127.25410.28.127.255
5810.28.128.0/1710.28.128.1 – 10.28.255.25410.28.255.255
5910.29.0.0/1710.29.0.1 – 10.29.127.25410.29.127.255
6010.29.128.0/1710.29.128.1 – 10.29.255.25410.29.255.255
6110.30.0.0/1710.30.0.1 – 10.30.127.25410.30.127.255
6210.30.128.0/1710.30.128.1 – 10.30.255.25410.30.255.255
6310.31.0.0/1710.31.0.1 – 10.31.127.25410.31.127.255
6410.31.128.0/1710.31.128.1 – 10.31.255.25410.31.255.255
01 / table

IPv4 CIDR prefix table.

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

prefixsubnet maskaddresseshostsin your /11
/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-
/11255.224.0.02,097,1522,097,1501
/12255.240.0.01,048,5761,048,5742 split →
/13255.248.0.0524,288524,2864 split →
/14255.252.0.0262,144262,1428 split →
/15255.254.0.0131,072131,07016 split →
/16255.255.0.065,53665,53432 split →
/17255.255.128.032,76832,76664 split →
/18255.255.192.016,38416,382128 split →
/19255.255.224.08,1928,190256 split →
/20255.255.240.04,0964,094512 split →
/21255.255.248.02,0482,0461,024 split →
/22255.255.252.01,0241,0222,048 split →
/23255.255.254.05125104,096 split →
/24255.255.255.02562548,192 split →
/25255.255.255.12812812616,384 split →
/26255.255.255.192646232,768 split →
/27255.255.255.224323065,536 split →
/28255.255.255.2401614131,072 split →
/29255.255.255.24886262,144 split →
/30255.255.255.25242524,288 split →
/31255.255.255.254221,048,576 split →
/32255.255.255.255112,097,152 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 →