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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)10.144.0.0/13
network10.144.0.0/13
broadcast10.151.255.255
first host10.144.0.1
last host10.151.255.254
subnet mask255.248.0.0
wildcard0.7.255.255
addresses524,288
usable hosts524,286
classA
ipcalc 10.144.0.0/13
address00001010.10010000.00000000.00000000
subnet mask11111111.11111000.00000000.00000000
network00001010.10010000.00000000.00000000
broadcast00001010.10010111.11111111.11111111
green = network part, grey = host part
hex0x0a900000
decimal177209344
reverse dns0.0.144.10.in-addr.arpa
ipv4-mapped::ffff:a90:0

/13 split into /18 · 32 subnets

close ×
#networkhost rangebroadcast
110.144.0.0/1810.144.0.1 – 10.144.63.25410.144.63.255
210.144.64.0/1810.144.64.1 – 10.144.127.25410.144.127.255
310.144.128.0/1810.144.128.1 – 10.144.191.25410.144.191.255
410.144.192.0/1810.144.192.1 – 10.144.255.25410.144.255.255
510.145.0.0/1810.145.0.1 – 10.145.63.25410.145.63.255
610.145.64.0/1810.145.64.1 – 10.145.127.25410.145.127.255
710.145.128.0/1810.145.128.1 – 10.145.191.25410.145.191.255
810.145.192.0/1810.145.192.1 – 10.145.255.25410.145.255.255
910.146.0.0/1810.146.0.1 – 10.146.63.25410.146.63.255
1010.146.64.0/1810.146.64.1 – 10.146.127.25410.146.127.255
1110.146.128.0/1810.146.128.1 – 10.146.191.25410.146.191.255
1210.146.192.0/1810.146.192.1 – 10.146.255.25410.146.255.255
1310.147.0.0/1810.147.0.1 – 10.147.63.25410.147.63.255
1410.147.64.0/1810.147.64.1 – 10.147.127.25410.147.127.255
1510.147.128.0/1810.147.128.1 – 10.147.191.25410.147.191.255
1610.147.192.0/1810.147.192.1 – 10.147.255.25410.147.255.255
1710.148.0.0/1810.148.0.1 – 10.148.63.25410.148.63.255
1810.148.64.0/1810.148.64.1 – 10.148.127.25410.148.127.255
1910.148.128.0/1810.148.128.1 – 10.148.191.25410.148.191.255
2010.148.192.0/1810.148.192.1 – 10.148.255.25410.148.255.255
2110.149.0.0/1810.149.0.1 – 10.149.63.25410.149.63.255
2210.149.64.0/1810.149.64.1 – 10.149.127.25410.149.127.255
2310.149.128.0/1810.149.128.1 – 10.149.191.25410.149.191.255
2410.149.192.0/1810.149.192.1 – 10.149.255.25410.149.255.255
2510.150.0.0/1810.150.0.1 – 10.150.63.25410.150.63.255
2610.150.64.0/1810.150.64.1 – 10.150.127.25410.150.127.255
2710.150.128.0/1810.150.128.1 – 10.150.191.25410.150.191.255
2810.150.192.0/1810.150.192.1 – 10.150.255.25410.150.255.255
2910.151.0.0/1810.151.0.1 – 10.151.63.25410.151.63.255
3010.151.64.0/1810.151.64.1 – 10.151.127.25410.151.127.255
3110.151.128.0/1810.151.128.1 – 10.151.191.25410.151.191.255
3210.151.192.0/1810.151.192.1 – 10.151.255.25410.151.255.255
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 →