ip
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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)10.152.0.0/13
network10.152.0.0/13
broadcast10.159.255.255
first host10.152.0.1
last host10.159.255.254
subnet mask255.248.0.0
wildcard0.7.255.255
addresses524,288
usable hosts524,286
classA
ipcalc 10.152.0.0/13
address00001010.10011000.00000000.00000000
subnet mask11111111.11111000.00000000.00000000
network00001010.10011000.00000000.00000000
broadcast00001010.10011111.11111111.11111111
green = network part, grey = host part
hex0x0a980000
decimal177733632
reverse dns0.0.152.10.in-addr.arpa
ipv4-mapped::ffff:a98:0

/13 split into /18 · 32 subnets

close ×
#networkhost rangebroadcast
110.152.0.0/1810.152.0.1 – 10.152.63.25410.152.63.255
210.152.64.0/1810.152.64.1 – 10.152.127.25410.152.127.255
310.152.128.0/1810.152.128.1 – 10.152.191.25410.152.191.255
410.152.192.0/1810.152.192.1 – 10.152.255.25410.152.255.255
510.153.0.0/1810.153.0.1 – 10.153.63.25410.153.63.255
610.153.64.0/1810.153.64.1 – 10.153.127.25410.153.127.255
710.153.128.0/1810.153.128.1 – 10.153.191.25410.153.191.255
810.153.192.0/1810.153.192.1 – 10.153.255.25410.153.255.255
910.154.0.0/1810.154.0.1 – 10.154.63.25410.154.63.255
1010.154.64.0/1810.154.64.1 – 10.154.127.25410.154.127.255
1110.154.128.0/1810.154.128.1 – 10.154.191.25410.154.191.255
1210.154.192.0/1810.154.192.1 – 10.154.255.25410.154.255.255
1310.155.0.0/1810.155.0.1 – 10.155.63.25410.155.63.255
1410.155.64.0/1810.155.64.1 – 10.155.127.25410.155.127.255
1510.155.128.0/1810.155.128.1 – 10.155.191.25410.155.191.255
1610.155.192.0/1810.155.192.1 – 10.155.255.25410.155.255.255
1710.156.0.0/1810.156.0.1 – 10.156.63.25410.156.63.255
1810.156.64.0/1810.156.64.1 – 10.156.127.25410.156.127.255
1910.156.128.0/1810.156.128.1 – 10.156.191.25410.156.191.255
2010.156.192.0/1810.156.192.1 – 10.156.255.25410.156.255.255
2110.157.0.0/1810.157.0.1 – 10.157.63.25410.157.63.255
2210.157.64.0/1810.157.64.1 – 10.157.127.25410.157.127.255
2310.157.128.0/1810.157.128.1 – 10.157.191.25410.157.191.255
2410.157.192.0/1810.157.192.1 – 10.157.255.25410.157.255.255
2510.158.0.0/1810.158.0.1 – 10.158.63.25410.158.63.255
2610.158.64.0/1810.158.64.1 – 10.158.127.25410.158.127.255
2710.158.128.0/1810.158.128.1 – 10.158.191.25410.158.191.255
2810.158.192.0/1810.158.192.1 – 10.158.255.25410.158.255.255
2910.159.0.0/1810.159.0.1 – 10.159.63.25410.159.63.255
3010.159.64.0/1810.159.64.1 – 10.159.127.25410.159.127.255
3110.159.128.0/1810.159.128.1 – 10.159.191.25410.159.191.255
3210.159.192.0/1810.159.192.1 – 10.159.255.25410.159.255.255
01 / table

IPv4 CIDR prefix table.

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

prefixsubnet maskaddresseshostsin your /13
/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-
/13255.248.0.0524,288524,2861
/14255.252.0.0262,144262,1422 split →
/15255.254.0.0131,072131,0704 split →
/16255.255.0.065,53665,5348 split →
/17255.255.128.032,76832,76616 split →
/18255.255.192.016,38416,38232 split →
/19255.255.224.08,1928,19064 split →
/20255.255.240.04,0964,094128 split →
/21255.255.248.02,0482,046256 split →
/22255.255.252.01,0241,022512 split →
/23255.255.254.05125101,024 split →
/24255.255.255.02562542,048 split →
/25255.255.255.1281281264,096 split →
/26255.255.255.19264628,192 split →
/27255.255.255.224323016,384 split →
/28255.255.255.240161432,768 split →
/29255.255.255.2488665,536 split →
/30255.255.255.25242131,072 split →
/31255.255.255.25422262,144 split →
/32255.255.255.25511524,288 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 →