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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)10.239.46.0/23
network10.239.46.0/23
broadcast10.239.47.255
first host10.239.46.1
last host10.239.47.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.239.46.0/23
address00001010.11101111.00101110.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.11101111.00101110.00000000
broadcast00001010.11101111.00101111.11111111
green = network part, grey = host part
hex0x0aef2e00
decimal183447040
reverse dns0.46.239.10.in-addr.arpa
ipv4-mapped::ffff:aef:2e00

/23 split into /29 · 64 subnets

close ×
#networkhost rangebroadcast
110.239.46.0/2910.239.46.1 – 10.239.46.610.239.46.7
210.239.46.8/2910.239.46.9 – 10.239.46.1410.239.46.15
310.239.46.16/2910.239.46.17 – 10.239.46.2210.239.46.23
410.239.46.24/2910.239.46.25 – 10.239.46.3010.239.46.31
510.239.46.32/2910.239.46.33 – 10.239.46.3810.239.46.39
610.239.46.40/2910.239.46.41 – 10.239.46.4610.239.46.47
710.239.46.48/2910.239.46.49 – 10.239.46.5410.239.46.55
810.239.46.56/2910.239.46.57 – 10.239.46.6210.239.46.63
910.239.46.64/2910.239.46.65 – 10.239.46.7010.239.46.71
1010.239.46.72/2910.239.46.73 – 10.239.46.7810.239.46.79
1110.239.46.80/2910.239.46.81 – 10.239.46.8610.239.46.87
1210.239.46.88/2910.239.46.89 – 10.239.46.9410.239.46.95
1310.239.46.96/2910.239.46.97 – 10.239.46.10210.239.46.103
1410.239.46.104/2910.239.46.105 – 10.239.46.11010.239.46.111
1510.239.46.112/2910.239.46.113 – 10.239.46.11810.239.46.119
1610.239.46.120/2910.239.46.121 – 10.239.46.12610.239.46.127
1710.239.46.128/2910.239.46.129 – 10.239.46.13410.239.46.135
1810.239.46.136/2910.239.46.137 – 10.239.46.14210.239.46.143
1910.239.46.144/2910.239.46.145 – 10.239.46.15010.239.46.151
2010.239.46.152/2910.239.46.153 – 10.239.46.15810.239.46.159
2110.239.46.160/2910.239.46.161 – 10.239.46.16610.239.46.167
2210.239.46.168/2910.239.46.169 – 10.239.46.17410.239.46.175
2310.239.46.176/2910.239.46.177 – 10.239.46.18210.239.46.183
2410.239.46.184/2910.239.46.185 – 10.239.46.19010.239.46.191
2510.239.46.192/2910.239.46.193 – 10.239.46.19810.239.46.199
2610.239.46.200/2910.239.46.201 – 10.239.46.20610.239.46.207
2710.239.46.208/2910.239.46.209 – 10.239.46.21410.239.46.215
2810.239.46.216/2910.239.46.217 – 10.239.46.22210.239.46.223
2910.239.46.224/2910.239.46.225 – 10.239.46.23010.239.46.231
3010.239.46.232/2910.239.46.233 – 10.239.46.23810.239.46.239
3110.239.46.240/2910.239.46.241 – 10.239.46.24610.239.46.247
3210.239.46.248/2910.239.46.249 – 10.239.46.25410.239.46.255
3310.239.47.0/2910.239.47.1 – 10.239.47.610.239.47.7
3410.239.47.8/2910.239.47.9 – 10.239.47.1410.239.47.15
3510.239.47.16/2910.239.47.17 – 10.239.47.2210.239.47.23
3610.239.47.24/2910.239.47.25 – 10.239.47.3010.239.47.31
3710.239.47.32/2910.239.47.33 – 10.239.47.3810.239.47.39
3810.239.47.40/2910.239.47.41 – 10.239.47.4610.239.47.47
3910.239.47.48/2910.239.47.49 – 10.239.47.5410.239.47.55
4010.239.47.56/2910.239.47.57 – 10.239.47.6210.239.47.63
4110.239.47.64/2910.239.47.65 – 10.239.47.7010.239.47.71
4210.239.47.72/2910.239.47.73 – 10.239.47.7810.239.47.79
4310.239.47.80/2910.239.47.81 – 10.239.47.8610.239.47.87
4410.239.47.88/2910.239.47.89 – 10.239.47.9410.239.47.95
4510.239.47.96/2910.239.47.97 – 10.239.47.10210.239.47.103
4610.239.47.104/2910.239.47.105 – 10.239.47.11010.239.47.111
4710.239.47.112/2910.239.47.113 – 10.239.47.11810.239.47.119
4810.239.47.120/2910.239.47.121 – 10.239.47.12610.239.47.127
4910.239.47.128/2910.239.47.129 – 10.239.47.13410.239.47.135
5010.239.47.136/2910.239.47.137 – 10.239.47.14210.239.47.143
5110.239.47.144/2910.239.47.145 – 10.239.47.15010.239.47.151
5210.239.47.152/2910.239.47.153 – 10.239.47.15810.239.47.159
5310.239.47.160/2910.239.47.161 – 10.239.47.16610.239.47.167
5410.239.47.168/2910.239.47.169 – 10.239.47.17410.239.47.175
5510.239.47.176/2910.239.47.177 – 10.239.47.18210.239.47.183
5610.239.47.184/2910.239.47.185 – 10.239.47.19010.239.47.191
5710.239.47.192/2910.239.47.193 – 10.239.47.19810.239.47.199
5810.239.47.200/2910.239.47.201 – 10.239.47.20610.239.47.207
5910.239.47.208/2910.239.47.209 – 10.239.47.21410.239.47.215
6010.239.47.216/2910.239.47.217 – 10.239.47.22210.239.47.223
6110.239.47.224/2910.239.47.225 – 10.239.47.23010.239.47.231
6210.239.47.232/2910.239.47.233 – 10.239.47.23810.239.47.239
6310.239.47.240/2910.239.47.241 – 10.239.47.24610.239.47.247
6410.239.47.248/2910.239.47.249 – 10.239.47.25410.239.47.255
01 / table

IPv4 CIDR prefix table.

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

prefixsubnet maskaddresseshostsin your /23
/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-
/23255.255.254.05125101
/24255.255.255.02562542 split →
/25255.255.255.1281281264 split →
/26255.255.255.19264628 split →
/27255.255.255.224323016 split →
/28255.255.255.240161432 split →
/29255.255.255.2488664 split →
/30255.255.255.25242128 split →
/31255.255.255.25422256 split →
/32255.255.255.25511512 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 →