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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)10.7.58.0/23
network10.7.58.0/23
broadcast10.7.59.255
first host10.7.58.1
last host10.7.59.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.7.58.0/23
address00001010.00000111.00111010.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00000111.00111010.00000000
broadcast00001010.00000111.00111011.11111111
green = network part, grey = host part
hex0x0a073a00
decimal168245760
reverse dns0.58.7.10.in-addr.arpa
ipv4-mapped::ffff:a07:3a00

/23 split into /29 · 64 subnets

close ×
#networkhost rangebroadcast
110.7.58.0/2910.7.58.1 – 10.7.58.610.7.58.7
210.7.58.8/2910.7.58.9 – 10.7.58.1410.7.58.15
310.7.58.16/2910.7.58.17 – 10.7.58.2210.7.58.23
410.7.58.24/2910.7.58.25 – 10.7.58.3010.7.58.31
510.7.58.32/2910.7.58.33 – 10.7.58.3810.7.58.39
610.7.58.40/2910.7.58.41 – 10.7.58.4610.7.58.47
710.7.58.48/2910.7.58.49 – 10.7.58.5410.7.58.55
810.7.58.56/2910.7.58.57 – 10.7.58.6210.7.58.63
910.7.58.64/2910.7.58.65 – 10.7.58.7010.7.58.71
1010.7.58.72/2910.7.58.73 – 10.7.58.7810.7.58.79
1110.7.58.80/2910.7.58.81 – 10.7.58.8610.7.58.87
1210.7.58.88/2910.7.58.89 – 10.7.58.9410.7.58.95
1310.7.58.96/2910.7.58.97 – 10.7.58.10210.7.58.103
1410.7.58.104/2910.7.58.105 – 10.7.58.11010.7.58.111
1510.7.58.112/2910.7.58.113 – 10.7.58.11810.7.58.119
1610.7.58.120/2910.7.58.121 – 10.7.58.12610.7.58.127
1710.7.58.128/2910.7.58.129 – 10.7.58.13410.7.58.135
1810.7.58.136/2910.7.58.137 – 10.7.58.14210.7.58.143
1910.7.58.144/2910.7.58.145 – 10.7.58.15010.7.58.151
2010.7.58.152/2910.7.58.153 – 10.7.58.15810.7.58.159
2110.7.58.160/2910.7.58.161 – 10.7.58.16610.7.58.167
2210.7.58.168/2910.7.58.169 – 10.7.58.17410.7.58.175
2310.7.58.176/2910.7.58.177 – 10.7.58.18210.7.58.183
2410.7.58.184/2910.7.58.185 – 10.7.58.19010.7.58.191
2510.7.58.192/2910.7.58.193 – 10.7.58.19810.7.58.199
2610.7.58.200/2910.7.58.201 – 10.7.58.20610.7.58.207
2710.7.58.208/2910.7.58.209 – 10.7.58.21410.7.58.215
2810.7.58.216/2910.7.58.217 – 10.7.58.22210.7.58.223
2910.7.58.224/2910.7.58.225 – 10.7.58.23010.7.58.231
3010.7.58.232/2910.7.58.233 – 10.7.58.23810.7.58.239
3110.7.58.240/2910.7.58.241 – 10.7.58.24610.7.58.247
3210.7.58.248/2910.7.58.249 – 10.7.58.25410.7.58.255
3310.7.59.0/2910.7.59.1 – 10.7.59.610.7.59.7
3410.7.59.8/2910.7.59.9 – 10.7.59.1410.7.59.15
3510.7.59.16/2910.7.59.17 – 10.7.59.2210.7.59.23
3610.7.59.24/2910.7.59.25 – 10.7.59.3010.7.59.31
3710.7.59.32/2910.7.59.33 – 10.7.59.3810.7.59.39
3810.7.59.40/2910.7.59.41 – 10.7.59.4610.7.59.47
3910.7.59.48/2910.7.59.49 – 10.7.59.5410.7.59.55
4010.7.59.56/2910.7.59.57 – 10.7.59.6210.7.59.63
4110.7.59.64/2910.7.59.65 – 10.7.59.7010.7.59.71
4210.7.59.72/2910.7.59.73 – 10.7.59.7810.7.59.79
4310.7.59.80/2910.7.59.81 – 10.7.59.8610.7.59.87
4410.7.59.88/2910.7.59.89 – 10.7.59.9410.7.59.95
4510.7.59.96/2910.7.59.97 – 10.7.59.10210.7.59.103
4610.7.59.104/2910.7.59.105 – 10.7.59.11010.7.59.111
4710.7.59.112/2910.7.59.113 – 10.7.59.11810.7.59.119
4810.7.59.120/2910.7.59.121 – 10.7.59.12610.7.59.127
4910.7.59.128/2910.7.59.129 – 10.7.59.13410.7.59.135
5010.7.59.136/2910.7.59.137 – 10.7.59.14210.7.59.143
5110.7.59.144/2910.7.59.145 – 10.7.59.15010.7.59.151
5210.7.59.152/2910.7.59.153 – 10.7.59.15810.7.59.159
5310.7.59.160/2910.7.59.161 – 10.7.59.16610.7.59.167
5410.7.59.168/2910.7.59.169 – 10.7.59.17410.7.59.175
5510.7.59.176/2910.7.59.177 – 10.7.59.18210.7.59.183
5610.7.59.184/2910.7.59.185 – 10.7.59.19010.7.59.191
5710.7.59.192/2910.7.59.193 – 10.7.59.19810.7.59.199
5810.7.59.200/2910.7.59.201 – 10.7.59.20610.7.59.207
5910.7.59.208/2910.7.59.209 – 10.7.59.21410.7.59.215
6010.7.59.216/2910.7.59.217 – 10.7.59.22210.7.59.223
6110.7.59.224/2910.7.59.225 – 10.7.59.23010.7.59.231
6210.7.59.232/2910.7.59.233 – 10.7.59.23810.7.59.239
6310.7.59.240/2910.7.59.241 – 10.7.59.24610.7.59.247
6410.7.59.248/2910.7.59.249 – 10.7.59.25410.7.59.255
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 →