ip
ipku.in

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)10.7.145.0/24
network10.7.145.0/24
broadcast10.7.145.255
first host10.7.145.1
last host10.7.145.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.7.145.0/24
address00001010.00000111.10010001.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.00000111.10010001.00000000
broadcast00001010.00000111.10010001.11111111
green = network part, grey = host part
hex0x0a079100
decimal168268032
reverse dns0.145.7.10.in-addr.arpa
ipv4-mapped::ffff:a07:9100

/24 split into /29 · 32 subnets

close ×
#networkhost rangebroadcast
110.7.145.0/2910.7.145.1 – 10.7.145.610.7.145.7
210.7.145.8/2910.7.145.9 – 10.7.145.1410.7.145.15
310.7.145.16/2910.7.145.17 – 10.7.145.2210.7.145.23
410.7.145.24/2910.7.145.25 – 10.7.145.3010.7.145.31
510.7.145.32/2910.7.145.33 – 10.7.145.3810.7.145.39
610.7.145.40/2910.7.145.41 – 10.7.145.4610.7.145.47
710.7.145.48/2910.7.145.49 – 10.7.145.5410.7.145.55
810.7.145.56/2910.7.145.57 – 10.7.145.6210.7.145.63
910.7.145.64/2910.7.145.65 – 10.7.145.7010.7.145.71
1010.7.145.72/2910.7.145.73 – 10.7.145.7810.7.145.79
1110.7.145.80/2910.7.145.81 – 10.7.145.8610.7.145.87
1210.7.145.88/2910.7.145.89 – 10.7.145.9410.7.145.95
1310.7.145.96/2910.7.145.97 – 10.7.145.10210.7.145.103
1410.7.145.104/2910.7.145.105 – 10.7.145.11010.7.145.111
1510.7.145.112/2910.7.145.113 – 10.7.145.11810.7.145.119
1610.7.145.120/2910.7.145.121 – 10.7.145.12610.7.145.127
1710.7.145.128/2910.7.145.129 – 10.7.145.13410.7.145.135
1810.7.145.136/2910.7.145.137 – 10.7.145.14210.7.145.143
1910.7.145.144/2910.7.145.145 – 10.7.145.15010.7.145.151
2010.7.145.152/2910.7.145.153 – 10.7.145.15810.7.145.159
2110.7.145.160/2910.7.145.161 – 10.7.145.16610.7.145.167
2210.7.145.168/2910.7.145.169 – 10.7.145.17410.7.145.175
2310.7.145.176/2910.7.145.177 – 10.7.145.18210.7.145.183
2410.7.145.184/2910.7.145.185 – 10.7.145.19010.7.145.191
2510.7.145.192/2910.7.145.193 – 10.7.145.19810.7.145.199
2610.7.145.200/2910.7.145.201 – 10.7.145.20610.7.145.207
2710.7.145.208/2910.7.145.209 – 10.7.145.21410.7.145.215
2810.7.145.216/2910.7.145.217 – 10.7.145.22210.7.145.223
2910.7.145.224/2910.7.145.225 – 10.7.145.23010.7.145.231
3010.7.145.232/2910.7.145.233 – 10.7.145.23810.7.145.239
3110.7.145.240/2910.7.145.241 – 10.7.145.24610.7.145.247
3210.7.145.248/2910.7.145.249 – 10.7.145.25410.7.145.255
01 / table

IPv4 CIDR prefix table.

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

prefixsubnet maskaddresseshostsin your /24
/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-
/17255.255.128.032,76832,766-
/18255.255.192.016,38416,382-
/19255.255.224.08,1928,190-
/20255.255.240.04,0964,094-
/21255.255.248.02,0482,046-
/22255.255.252.01,0241,022-
/23255.255.254.0512510-
/24255.255.255.02562541
/25255.255.255.1281281262 split →
/26255.255.255.19264624 split →
/27255.255.255.22432308 split →
/28255.255.255.240161416 split →
/29255.255.255.2488632 split →
/30255.255.255.2524264 split →
/31255.255.255.25422128 split →
/32255.255.255.25511256 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 →