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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)10.3.52.0/25
network10.3.52.0/25
broadcast10.3.52.127
first host10.3.52.1
last host10.3.52.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.3.52.0/25
address00001010.00000011.00110100.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000011.00110100.00000000
broadcast00001010.00000011.00110100.01111111
green = network part, grey = host part
hex0x0a033400
decimal167982080
reverse dns0.52.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:3400

/25 split into /31 · 64 subnets

close ×
#networkhost rangebroadcast
110.3.52.0/3110.3.52.0 – 10.3.52.110.3.52.1
210.3.52.2/3110.3.52.2 – 10.3.52.310.3.52.3
310.3.52.4/3110.3.52.4 – 10.3.52.510.3.52.5
410.3.52.6/3110.3.52.6 – 10.3.52.710.3.52.7
510.3.52.8/3110.3.52.8 – 10.3.52.910.3.52.9
610.3.52.10/3110.3.52.10 – 10.3.52.1110.3.52.11
710.3.52.12/3110.3.52.12 – 10.3.52.1310.3.52.13
810.3.52.14/3110.3.52.14 – 10.3.52.1510.3.52.15
910.3.52.16/3110.3.52.16 – 10.3.52.1710.3.52.17
1010.3.52.18/3110.3.52.18 – 10.3.52.1910.3.52.19
1110.3.52.20/3110.3.52.20 – 10.3.52.2110.3.52.21
1210.3.52.22/3110.3.52.22 – 10.3.52.2310.3.52.23
1310.3.52.24/3110.3.52.24 – 10.3.52.2510.3.52.25
1410.3.52.26/3110.3.52.26 – 10.3.52.2710.3.52.27
1510.3.52.28/3110.3.52.28 – 10.3.52.2910.3.52.29
1610.3.52.30/3110.3.52.30 – 10.3.52.3110.3.52.31
1710.3.52.32/3110.3.52.32 – 10.3.52.3310.3.52.33
1810.3.52.34/3110.3.52.34 – 10.3.52.3510.3.52.35
1910.3.52.36/3110.3.52.36 – 10.3.52.3710.3.52.37
2010.3.52.38/3110.3.52.38 – 10.3.52.3910.3.52.39
2110.3.52.40/3110.3.52.40 – 10.3.52.4110.3.52.41
2210.3.52.42/3110.3.52.42 – 10.3.52.4310.3.52.43
2310.3.52.44/3110.3.52.44 – 10.3.52.4510.3.52.45
2410.3.52.46/3110.3.52.46 – 10.3.52.4710.3.52.47
2510.3.52.48/3110.3.52.48 – 10.3.52.4910.3.52.49
2610.3.52.50/3110.3.52.50 – 10.3.52.5110.3.52.51
2710.3.52.52/3110.3.52.52 – 10.3.52.5310.3.52.53
2810.3.52.54/3110.3.52.54 – 10.3.52.5510.3.52.55
2910.3.52.56/3110.3.52.56 – 10.3.52.5710.3.52.57
3010.3.52.58/3110.3.52.58 – 10.3.52.5910.3.52.59
3110.3.52.60/3110.3.52.60 – 10.3.52.6110.3.52.61
3210.3.52.62/3110.3.52.62 – 10.3.52.6310.3.52.63
3310.3.52.64/3110.3.52.64 – 10.3.52.6510.3.52.65
3410.3.52.66/3110.3.52.66 – 10.3.52.6710.3.52.67
3510.3.52.68/3110.3.52.68 – 10.3.52.6910.3.52.69
3610.3.52.70/3110.3.52.70 – 10.3.52.7110.3.52.71
3710.3.52.72/3110.3.52.72 – 10.3.52.7310.3.52.73
3810.3.52.74/3110.3.52.74 – 10.3.52.7510.3.52.75
3910.3.52.76/3110.3.52.76 – 10.3.52.7710.3.52.77
4010.3.52.78/3110.3.52.78 – 10.3.52.7910.3.52.79
4110.3.52.80/3110.3.52.80 – 10.3.52.8110.3.52.81
4210.3.52.82/3110.3.52.82 – 10.3.52.8310.3.52.83
4310.3.52.84/3110.3.52.84 – 10.3.52.8510.3.52.85
4410.3.52.86/3110.3.52.86 – 10.3.52.8710.3.52.87
4510.3.52.88/3110.3.52.88 – 10.3.52.8910.3.52.89
4610.3.52.90/3110.3.52.90 – 10.3.52.9110.3.52.91
4710.3.52.92/3110.3.52.92 – 10.3.52.9310.3.52.93
4810.3.52.94/3110.3.52.94 – 10.3.52.9510.3.52.95
4910.3.52.96/3110.3.52.96 – 10.3.52.9710.3.52.97
5010.3.52.98/3110.3.52.98 – 10.3.52.9910.3.52.99
5110.3.52.100/3110.3.52.100 – 10.3.52.10110.3.52.101
5210.3.52.102/3110.3.52.102 – 10.3.52.10310.3.52.103
5310.3.52.104/3110.3.52.104 – 10.3.52.10510.3.52.105
5410.3.52.106/3110.3.52.106 – 10.3.52.10710.3.52.107
5510.3.52.108/3110.3.52.108 – 10.3.52.10910.3.52.109
5610.3.52.110/3110.3.52.110 – 10.3.52.11110.3.52.111
5710.3.52.112/3110.3.52.112 – 10.3.52.11310.3.52.113
5810.3.52.114/3110.3.52.114 – 10.3.52.11510.3.52.115
5910.3.52.116/3110.3.52.116 – 10.3.52.11710.3.52.117
6010.3.52.118/3110.3.52.118 – 10.3.52.11910.3.52.119
6110.3.52.120/3110.3.52.120 – 10.3.52.12110.3.52.121
6210.3.52.122/3110.3.52.122 – 10.3.52.12310.3.52.123
6310.3.52.124/3110.3.52.124 – 10.3.52.12510.3.52.125
6410.3.52.126/3110.3.52.126 – 10.3.52.12710.3.52.127
01 / table

IPv4 CIDR prefix table.

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

prefixsubnet maskaddresseshostsin your /25
/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-
/24255.255.255.0256254-
/25255.255.255.1281281261
/26255.255.255.19264622 split →
/27255.255.255.22432304 split →
/28255.255.255.24016148 split →
/29255.255.255.2488616 split →
/30255.255.255.2524232 split →
/31255.255.255.2542264 split →
/32255.255.255.25511128 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 →