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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)10.3.174.0/23
network10.3.174.0/23
broadcast10.3.175.255
first host10.3.174.1
last host10.3.175.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.3.174.0/23
address00001010.00000011.10101110.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00000011.10101110.00000000
broadcast00001010.00000011.10101111.11111111
green = network part, grey = host part
hex0x0a03ae00
decimal168013312
reverse dns0.174.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:ae00

/23 split into /29 · 64 subnets

close ×
#networkhost rangebroadcast
110.3.174.0/2910.3.174.1 – 10.3.174.610.3.174.7
210.3.174.8/2910.3.174.9 – 10.3.174.1410.3.174.15
310.3.174.16/2910.3.174.17 – 10.3.174.2210.3.174.23
410.3.174.24/2910.3.174.25 – 10.3.174.3010.3.174.31
510.3.174.32/2910.3.174.33 – 10.3.174.3810.3.174.39
610.3.174.40/2910.3.174.41 – 10.3.174.4610.3.174.47
710.3.174.48/2910.3.174.49 – 10.3.174.5410.3.174.55
810.3.174.56/2910.3.174.57 – 10.3.174.6210.3.174.63
910.3.174.64/2910.3.174.65 – 10.3.174.7010.3.174.71
1010.3.174.72/2910.3.174.73 – 10.3.174.7810.3.174.79
1110.3.174.80/2910.3.174.81 – 10.3.174.8610.3.174.87
1210.3.174.88/2910.3.174.89 – 10.3.174.9410.3.174.95
1310.3.174.96/2910.3.174.97 – 10.3.174.10210.3.174.103
1410.3.174.104/2910.3.174.105 – 10.3.174.11010.3.174.111
1510.3.174.112/2910.3.174.113 – 10.3.174.11810.3.174.119
1610.3.174.120/2910.3.174.121 – 10.3.174.12610.3.174.127
1710.3.174.128/2910.3.174.129 – 10.3.174.13410.3.174.135
1810.3.174.136/2910.3.174.137 – 10.3.174.14210.3.174.143
1910.3.174.144/2910.3.174.145 – 10.3.174.15010.3.174.151
2010.3.174.152/2910.3.174.153 – 10.3.174.15810.3.174.159
2110.3.174.160/2910.3.174.161 – 10.3.174.16610.3.174.167
2210.3.174.168/2910.3.174.169 – 10.3.174.17410.3.174.175
2310.3.174.176/2910.3.174.177 – 10.3.174.18210.3.174.183
2410.3.174.184/2910.3.174.185 – 10.3.174.19010.3.174.191
2510.3.174.192/2910.3.174.193 – 10.3.174.19810.3.174.199
2610.3.174.200/2910.3.174.201 – 10.3.174.20610.3.174.207
2710.3.174.208/2910.3.174.209 – 10.3.174.21410.3.174.215
2810.3.174.216/2910.3.174.217 – 10.3.174.22210.3.174.223
2910.3.174.224/2910.3.174.225 – 10.3.174.23010.3.174.231
3010.3.174.232/2910.3.174.233 – 10.3.174.23810.3.174.239
3110.3.174.240/2910.3.174.241 – 10.3.174.24610.3.174.247
3210.3.174.248/2910.3.174.249 – 10.3.174.25410.3.174.255
3310.3.175.0/2910.3.175.1 – 10.3.175.610.3.175.7
3410.3.175.8/2910.3.175.9 – 10.3.175.1410.3.175.15
3510.3.175.16/2910.3.175.17 – 10.3.175.2210.3.175.23
3610.3.175.24/2910.3.175.25 – 10.3.175.3010.3.175.31
3710.3.175.32/2910.3.175.33 – 10.3.175.3810.3.175.39
3810.3.175.40/2910.3.175.41 – 10.3.175.4610.3.175.47
3910.3.175.48/2910.3.175.49 – 10.3.175.5410.3.175.55
4010.3.175.56/2910.3.175.57 – 10.3.175.6210.3.175.63
4110.3.175.64/2910.3.175.65 – 10.3.175.7010.3.175.71
4210.3.175.72/2910.3.175.73 – 10.3.175.7810.3.175.79
4310.3.175.80/2910.3.175.81 – 10.3.175.8610.3.175.87
4410.3.175.88/2910.3.175.89 – 10.3.175.9410.3.175.95
4510.3.175.96/2910.3.175.97 – 10.3.175.10210.3.175.103
4610.3.175.104/2910.3.175.105 – 10.3.175.11010.3.175.111
4710.3.175.112/2910.3.175.113 – 10.3.175.11810.3.175.119
4810.3.175.120/2910.3.175.121 – 10.3.175.12610.3.175.127
4910.3.175.128/2910.3.175.129 – 10.3.175.13410.3.175.135
5010.3.175.136/2910.3.175.137 – 10.3.175.14210.3.175.143
5110.3.175.144/2910.3.175.145 – 10.3.175.15010.3.175.151
5210.3.175.152/2910.3.175.153 – 10.3.175.15810.3.175.159
5310.3.175.160/2910.3.175.161 – 10.3.175.16610.3.175.167
5410.3.175.168/2910.3.175.169 – 10.3.175.17410.3.175.175
5510.3.175.176/2910.3.175.177 – 10.3.175.18210.3.175.183
5610.3.175.184/2910.3.175.185 – 10.3.175.19010.3.175.191
5710.3.175.192/2910.3.175.193 – 10.3.175.19810.3.175.199
5810.3.175.200/2910.3.175.201 – 10.3.175.20610.3.175.207
5910.3.175.208/2910.3.175.209 – 10.3.175.21410.3.175.215
6010.3.175.216/2910.3.175.217 – 10.3.175.22210.3.175.223
6110.3.175.224/2910.3.175.225 – 10.3.175.23010.3.175.231
6210.3.175.232/2910.3.175.233 – 10.3.175.23810.3.175.239
6310.3.175.240/2910.3.175.241 – 10.3.175.24610.3.175.247
6410.3.175.248/2910.3.175.249 – 10.3.175.25410.3.175.255
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 →