ip
ipku.in

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)10.2.61.0/24
network10.2.61.0/24
broadcast10.2.61.255
first host10.2.61.1
last host10.2.61.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.2.61.0/24
address00001010.00000010.00111101.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.00000010.00111101.00000000
broadcast00001010.00000010.00111101.11111111
green = network part, grey = host part
hex0x0a023d00
decimal167918848
reverse dns0.61.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:3d00

/24 split into /31 · 128 subnets

close ×
#networkhost rangebroadcast
110.2.61.0/3110.2.61.0 – 10.2.61.110.2.61.1
210.2.61.2/3110.2.61.2 – 10.2.61.310.2.61.3
310.2.61.4/3110.2.61.4 – 10.2.61.510.2.61.5
410.2.61.6/3110.2.61.6 – 10.2.61.710.2.61.7
510.2.61.8/3110.2.61.8 – 10.2.61.910.2.61.9
610.2.61.10/3110.2.61.10 – 10.2.61.1110.2.61.11
710.2.61.12/3110.2.61.12 – 10.2.61.1310.2.61.13
810.2.61.14/3110.2.61.14 – 10.2.61.1510.2.61.15
910.2.61.16/3110.2.61.16 – 10.2.61.1710.2.61.17
1010.2.61.18/3110.2.61.18 – 10.2.61.1910.2.61.19
1110.2.61.20/3110.2.61.20 – 10.2.61.2110.2.61.21
1210.2.61.22/3110.2.61.22 – 10.2.61.2310.2.61.23
1310.2.61.24/3110.2.61.24 – 10.2.61.2510.2.61.25
1410.2.61.26/3110.2.61.26 – 10.2.61.2710.2.61.27
1510.2.61.28/3110.2.61.28 – 10.2.61.2910.2.61.29
1610.2.61.30/3110.2.61.30 – 10.2.61.3110.2.61.31
1710.2.61.32/3110.2.61.32 – 10.2.61.3310.2.61.33
1810.2.61.34/3110.2.61.34 – 10.2.61.3510.2.61.35
1910.2.61.36/3110.2.61.36 – 10.2.61.3710.2.61.37
2010.2.61.38/3110.2.61.38 – 10.2.61.3910.2.61.39
2110.2.61.40/3110.2.61.40 – 10.2.61.4110.2.61.41
2210.2.61.42/3110.2.61.42 – 10.2.61.4310.2.61.43
2310.2.61.44/3110.2.61.44 – 10.2.61.4510.2.61.45
2410.2.61.46/3110.2.61.46 – 10.2.61.4710.2.61.47
2510.2.61.48/3110.2.61.48 – 10.2.61.4910.2.61.49
2610.2.61.50/3110.2.61.50 – 10.2.61.5110.2.61.51
2710.2.61.52/3110.2.61.52 – 10.2.61.5310.2.61.53
2810.2.61.54/3110.2.61.54 – 10.2.61.5510.2.61.55
2910.2.61.56/3110.2.61.56 – 10.2.61.5710.2.61.57
3010.2.61.58/3110.2.61.58 – 10.2.61.5910.2.61.59
3110.2.61.60/3110.2.61.60 – 10.2.61.6110.2.61.61
3210.2.61.62/3110.2.61.62 – 10.2.61.6310.2.61.63
3310.2.61.64/3110.2.61.64 – 10.2.61.6510.2.61.65
3410.2.61.66/3110.2.61.66 – 10.2.61.6710.2.61.67
3510.2.61.68/3110.2.61.68 – 10.2.61.6910.2.61.69
3610.2.61.70/3110.2.61.70 – 10.2.61.7110.2.61.71
3710.2.61.72/3110.2.61.72 – 10.2.61.7310.2.61.73
3810.2.61.74/3110.2.61.74 – 10.2.61.7510.2.61.75
3910.2.61.76/3110.2.61.76 – 10.2.61.7710.2.61.77
4010.2.61.78/3110.2.61.78 – 10.2.61.7910.2.61.79
4110.2.61.80/3110.2.61.80 – 10.2.61.8110.2.61.81
4210.2.61.82/3110.2.61.82 – 10.2.61.8310.2.61.83
4310.2.61.84/3110.2.61.84 – 10.2.61.8510.2.61.85
4410.2.61.86/3110.2.61.86 – 10.2.61.8710.2.61.87
4510.2.61.88/3110.2.61.88 – 10.2.61.8910.2.61.89
4610.2.61.90/3110.2.61.90 – 10.2.61.9110.2.61.91
4710.2.61.92/3110.2.61.92 – 10.2.61.9310.2.61.93
4810.2.61.94/3110.2.61.94 – 10.2.61.9510.2.61.95
4910.2.61.96/3110.2.61.96 – 10.2.61.9710.2.61.97
5010.2.61.98/3110.2.61.98 – 10.2.61.9910.2.61.99
5110.2.61.100/3110.2.61.100 – 10.2.61.10110.2.61.101
5210.2.61.102/3110.2.61.102 – 10.2.61.10310.2.61.103
5310.2.61.104/3110.2.61.104 – 10.2.61.10510.2.61.105
5410.2.61.106/3110.2.61.106 – 10.2.61.10710.2.61.107
5510.2.61.108/3110.2.61.108 – 10.2.61.10910.2.61.109
5610.2.61.110/3110.2.61.110 – 10.2.61.11110.2.61.111
5710.2.61.112/3110.2.61.112 – 10.2.61.11310.2.61.113
5810.2.61.114/3110.2.61.114 – 10.2.61.11510.2.61.115
5910.2.61.116/3110.2.61.116 – 10.2.61.11710.2.61.117
6010.2.61.118/3110.2.61.118 – 10.2.61.11910.2.61.119
6110.2.61.120/3110.2.61.120 – 10.2.61.12110.2.61.121
6210.2.61.122/3110.2.61.122 – 10.2.61.12310.2.61.123
6310.2.61.124/3110.2.61.124 – 10.2.61.12510.2.61.125
6410.2.61.126/3110.2.61.126 – 10.2.61.12710.2.61.127
6510.2.61.128/3110.2.61.128 – 10.2.61.12910.2.61.129
6610.2.61.130/3110.2.61.130 – 10.2.61.13110.2.61.131
6710.2.61.132/3110.2.61.132 – 10.2.61.13310.2.61.133
6810.2.61.134/3110.2.61.134 – 10.2.61.13510.2.61.135
6910.2.61.136/3110.2.61.136 – 10.2.61.13710.2.61.137
7010.2.61.138/3110.2.61.138 – 10.2.61.13910.2.61.139
7110.2.61.140/3110.2.61.140 – 10.2.61.14110.2.61.141
7210.2.61.142/3110.2.61.142 – 10.2.61.14310.2.61.143
7310.2.61.144/3110.2.61.144 – 10.2.61.14510.2.61.145
7410.2.61.146/3110.2.61.146 – 10.2.61.14710.2.61.147
7510.2.61.148/3110.2.61.148 – 10.2.61.14910.2.61.149
7610.2.61.150/3110.2.61.150 – 10.2.61.15110.2.61.151
7710.2.61.152/3110.2.61.152 – 10.2.61.15310.2.61.153
7810.2.61.154/3110.2.61.154 – 10.2.61.15510.2.61.155
7910.2.61.156/3110.2.61.156 – 10.2.61.15710.2.61.157
8010.2.61.158/3110.2.61.158 – 10.2.61.15910.2.61.159
8110.2.61.160/3110.2.61.160 – 10.2.61.16110.2.61.161
8210.2.61.162/3110.2.61.162 – 10.2.61.16310.2.61.163
8310.2.61.164/3110.2.61.164 – 10.2.61.16510.2.61.165
8410.2.61.166/3110.2.61.166 – 10.2.61.16710.2.61.167
8510.2.61.168/3110.2.61.168 – 10.2.61.16910.2.61.169
8610.2.61.170/3110.2.61.170 – 10.2.61.17110.2.61.171
8710.2.61.172/3110.2.61.172 – 10.2.61.17310.2.61.173
8810.2.61.174/3110.2.61.174 – 10.2.61.17510.2.61.175
8910.2.61.176/3110.2.61.176 – 10.2.61.17710.2.61.177
9010.2.61.178/3110.2.61.178 – 10.2.61.17910.2.61.179
9110.2.61.180/3110.2.61.180 – 10.2.61.18110.2.61.181
9210.2.61.182/3110.2.61.182 – 10.2.61.18310.2.61.183
9310.2.61.184/3110.2.61.184 – 10.2.61.18510.2.61.185
9410.2.61.186/3110.2.61.186 – 10.2.61.18710.2.61.187
9510.2.61.188/3110.2.61.188 – 10.2.61.18910.2.61.189
9610.2.61.190/3110.2.61.190 – 10.2.61.19110.2.61.191
9710.2.61.192/3110.2.61.192 – 10.2.61.19310.2.61.193
9810.2.61.194/3110.2.61.194 – 10.2.61.19510.2.61.195
9910.2.61.196/3110.2.61.196 – 10.2.61.19710.2.61.197
10010.2.61.198/3110.2.61.198 – 10.2.61.19910.2.61.199
10110.2.61.200/3110.2.61.200 – 10.2.61.20110.2.61.201
10210.2.61.202/3110.2.61.202 – 10.2.61.20310.2.61.203
10310.2.61.204/3110.2.61.204 – 10.2.61.20510.2.61.205
10410.2.61.206/3110.2.61.206 – 10.2.61.20710.2.61.207
10510.2.61.208/3110.2.61.208 – 10.2.61.20910.2.61.209
10610.2.61.210/3110.2.61.210 – 10.2.61.21110.2.61.211
10710.2.61.212/3110.2.61.212 – 10.2.61.21310.2.61.213
10810.2.61.214/3110.2.61.214 – 10.2.61.21510.2.61.215
10910.2.61.216/3110.2.61.216 – 10.2.61.21710.2.61.217
11010.2.61.218/3110.2.61.218 – 10.2.61.21910.2.61.219
11110.2.61.220/3110.2.61.220 – 10.2.61.22110.2.61.221
11210.2.61.222/3110.2.61.222 – 10.2.61.22310.2.61.223
11310.2.61.224/3110.2.61.224 – 10.2.61.22510.2.61.225
11410.2.61.226/3110.2.61.226 – 10.2.61.22710.2.61.227
11510.2.61.228/3110.2.61.228 – 10.2.61.22910.2.61.229
11610.2.61.230/3110.2.61.230 – 10.2.61.23110.2.61.231
11710.2.61.232/3110.2.61.232 – 10.2.61.23310.2.61.233
11810.2.61.234/3110.2.61.234 – 10.2.61.23510.2.61.235
11910.2.61.236/3110.2.61.236 – 10.2.61.23710.2.61.237
12010.2.61.238/3110.2.61.238 – 10.2.61.23910.2.61.239
12110.2.61.240/3110.2.61.240 – 10.2.61.24110.2.61.241
12210.2.61.242/3110.2.61.242 – 10.2.61.24310.2.61.243
12310.2.61.244/3110.2.61.244 – 10.2.61.24510.2.61.245
12410.2.61.246/3110.2.61.246 – 10.2.61.24710.2.61.247
12510.2.61.248/3110.2.61.248 – 10.2.61.24910.2.61.249
12610.2.61.250/3110.2.61.250 – 10.2.61.25110.2.61.251
12710.2.61.252/3110.2.61.252 – 10.2.61.25310.2.61.253
12810.2.61.254/3110.2.61.254 – 10.2.61.25510.2.61.255
01 / table

IPv4 CIDR prefix table.

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

prefixsubnet maskaddresseshostsin your /24
/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-
/24255.255.255.02562541
/25255.255.255.1281281262 split →
/26255.255.255.19264624 split →
/27255.255.255.22432308 split →
/28255.255.255.240161416 split →
/29255.255.255.2488632 split →
/30255.255.255.2524264 split →
/31255.255.255.25422128 split →
/32255.255.255.25511256 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 →