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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)10.4.46.0/23
network10.4.46.0/23
broadcast10.4.47.255
first host10.4.46.1
last host10.4.47.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.4.46.0/23
address00001010.00000100.00101110.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00000100.00101110.00000000
broadcast00001010.00000100.00101111.11111111
green = network part, grey = host part
hex0x0a042e00
decimal168046080
reverse dns0.46.4.10.in-addr.arpa
ipv4-mapped::ffff:a04:2e00

/23 split into /29 · 64 subnets

close ×
#networkhost rangebroadcast
110.4.46.0/2910.4.46.1 – 10.4.46.610.4.46.7
210.4.46.8/2910.4.46.9 – 10.4.46.1410.4.46.15
310.4.46.16/2910.4.46.17 – 10.4.46.2210.4.46.23
410.4.46.24/2910.4.46.25 – 10.4.46.3010.4.46.31
510.4.46.32/2910.4.46.33 – 10.4.46.3810.4.46.39
610.4.46.40/2910.4.46.41 – 10.4.46.4610.4.46.47
710.4.46.48/2910.4.46.49 – 10.4.46.5410.4.46.55
810.4.46.56/2910.4.46.57 – 10.4.46.6210.4.46.63
910.4.46.64/2910.4.46.65 – 10.4.46.7010.4.46.71
1010.4.46.72/2910.4.46.73 – 10.4.46.7810.4.46.79
1110.4.46.80/2910.4.46.81 – 10.4.46.8610.4.46.87
1210.4.46.88/2910.4.46.89 – 10.4.46.9410.4.46.95
1310.4.46.96/2910.4.46.97 – 10.4.46.10210.4.46.103
1410.4.46.104/2910.4.46.105 – 10.4.46.11010.4.46.111
1510.4.46.112/2910.4.46.113 – 10.4.46.11810.4.46.119
1610.4.46.120/2910.4.46.121 – 10.4.46.12610.4.46.127
1710.4.46.128/2910.4.46.129 – 10.4.46.13410.4.46.135
1810.4.46.136/2910.4.46.137 – 10.4.46.14210.4.46.143
1910.4.46.144/2910.4.46.145 – 10.4.46.15010.4.46.151
2010.4.46.152/2910.4.46.153 – 10.4.46.15810.4.46.159
2110.4.46.160/2910.4.46.161 – 10.4.46.16610.4.46.167
2210.4.46.168/2910.4.46.169 – 10.4.46.17410.4.46.175
2310.4.46.176/2910.4.46.177 – 10.4.46.18210.4.46.183
2410.4.46.184/2910.4.46.185 – 10.4.46.19010.4.46.191
2510.4.46.192/2910.4.46.193 – 10.4.46.19810.4.46.199
2610.4.46.200/2910.4.46.201 – 10.4.46.20610.4.46.207
2710.4.46.208/2910.4.46.209 – 10.4.46.21410.4.46.215
2810.4.46.216/2910.4.46.217 – 10.4.46.22210.4.46.223
2910.4.46.224/2910.4.46.225 – 10.4.46.23010.4.46.231
3010.4.46.232/2910.4.46.233 – 10.4.46.23810.4.46.239
3110.4.46.240/2910.4.46.241 – 10.4.46.24610.4.46.247
3210.4.46.248/2910.4.46.249 – 10.4.46.25410.4.46.255
3310.4.47.0/2910.4.47.1 – 10.4.47.610.4.47.7
3410.4.47.8/2910.4.47.9 – 10.4.47.1410.4.47.15
3510.4.47.16/2910.4.47.17 – 10.4.47.2210.4.47.23
3610.4.47.24/2910.4.47.25 – 10.4.47.3010.4.47.31
3710.4.47.32/2910.4.47.33 – 10.4.47.3810.4.47.39
3810.4.47.40/2910.4.47.41 – 10.4.47.4610.4.47.47
3910.4.47.48/2910.4.47.49 – 10.4.47.5410.4.47.55
4010.4.47.56/2910.4.47.57 – 10.4.47.6210.4.47.63
4110.4.47.64/2910.4.47.65 – 10.4.47.7010.4.47.71
4210.4.47.72/2910.4.47.73 – 10.4.47.7810.4.47.79
4310.4.47.80/2910.4.47.81 – 10.4.47.8610.4.47.87
4410.4.47.88/2910.4.47.89 – 10.4.47.9410.4.47.95
4510.4.47.96/2910.4.47.97 – 10.4.47.10210.4.47.103
4610.4.47.104/2910.4.47.105 – 10.4.47.11010.4.47.111
4710.4.47.112/2910.4.47.113 – 10.4.47.11810.4.47.119
4810.4.47.120/2910.4.47.121 – 10.4.47.12610.4.47.127
4910.4.47.128/2910.4.47.129 – 10.4.47.13410.4.47.135
5010.4.47.136/2910.4.47.137 – 10.4.47.14210.4.47.143
5110.4.47.144/2910.4.47.145 – 10.4.47.15010.4.47.151
5210.4.47.152/2910.4.47.153 – 10.4.47.15810.4.47.159
5310.4.47.160/2910.4.47.161 – 10.4.47.16610.4.47.167
5410.4.47.168/2910.4.47.169 – 10.4.47.17410.4.47.175
5510.4.47.176/2910.4.47.177 – 10.4.47.18210.4.47.183
5610.4.47.184/2910.4.47.185 – 10.4.47.19010.4.47.191
5710.4.47.192/2910.4.47.193 – 10.4.47.19810.4.47.199
5810.4.47.200/2910.4.47.201 – 10.4.47.20610.4.47.207
5910.4.47.208/2910.4.47.209 – 10.4.47.21410.4.47.215
6010.4.47.216/2910.4.47.217 – 10.4.47.22210.4.47.223
6110.4.47.224/2910.4.47.225 – 10.4.47.23010.4.47.231
6210.4.47.232/2910.4.47.233 – 10.4.47.23810.4.47.239
6310.4.47.240/2910.4.47.241 – 10.4.47.24610.4.47.247
6410.4.47.248/2910.4.47.249 – 10.4.47.25410.4.47.255
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 →