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)10.131.91.0/24
network10.131.91.0/24
broadcast10.131.91.255
first host10.131.91.1
last host10.131.91.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.131.91.0/24
address00001010.10000011.01011011.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.10000011.01011011.00000000
broadcast00001010.10000011.01011011.11111111
green = network part, grey = host part
hex0x0a835b00
decimal176380672
reverse dns0.91.131.10.in-addr.arpa
ipv4-mapped::ffff:a83:5b00

/24 split into /32 · 256 subnets

close ×
#networkhost rangebroadcast
110.131.91.0/3210.131.91.0 – 10.131.91.010.131.91.0
210.131.91.1/3210.131.91.1 – 10.131.91.110.131.91.1
310.131.91.2/3210.131.91.2 – 10.131.91.210.131.91.2
410.131.91.3/3210.131.91.3 – 10.131.91.310.131.91.3
510.131.91.4/3210.131.91.4 – 10.131.91.410.131.91.4
610.131.91.5/3210.131.91.5 – 10.131.91.510.131.91.5
710.131.91.6/3210.131.91.6 – 10.131.91.610.131.91.6
810.131.91.7/3210.131.91.7 – 10.131.91.710.131.91.7
910.131.91.8/3210.131.91.8 – 10.131.91.810.131.91.8
1010.131.91.9/3210.131.91.9 – 10.131.91.910.131.91.9
1110.131.91.10/3210.131.91.10 – 10.131.91.1010.131.91.10
1210.131.91.11/3210.131.91.11 – 10.131.91.1110.131.91.11
1310.131.91.12/3210.131.91.12 – 10.131.91.1210.131.91.12
1410.131.91.13/3210.131.91.13 – 10.131.91.1310.131.91.13
1510.131.91.14/3210.131.91.14 – 10.131.91.1410.131.91.14
1610.131.91.15/3210.131.91.15 – 10.131.91.1510.131.91.15
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1810.131.91.17/3210.131.91.17 – 10.131.91.1710.131.91.17
1910.131.91.18/3210.131.91.18 – 10.131.91.1810.131.91.18
2010.131.91.19/3210.131.91.19 – 10.131.91.1910.131.91.19
2110.131.91.20/3210.131.91.20 – 10.131.91.2010.131.91.20
2210.131.91.21/3210.131.91.21 – 10.131.91.2110.131.91.21
2310.131.91.22/3210.131.91.22 – 10.131.91.2210.131.91.22
2410.131.91.23/3210.131.91.23 – 10.131.91.2310.131.91.23
2510.131.91.24/3210.131.91.24 – 10.131.91.2410.131.91.24
2610.131.91.25/3210.131.91.25 – 10.131.91.2510.131.91.25
2710.131.91.26/3210.131.91.26 – 10.131.91.2610.131.91.26
2810.131.91.27/3210.131.91.27 – 10.131.91.2710.131.91.27
2910.131.91.28/3210.131.91.28 – 10.131.91.2810.131.91.28
3010.131.91.29/3210.131.91.29 – 10.131.91.2910.131.91.29
3110.131.91.30/3210.131.91.30 – 10.131.91.3010.131.91.30
3210.131.91.31/3210.131.91.31 – 10.131.91.3110.131.91.31
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3410.131.91.33/3210.131.91.33 – 10.131.91.3310.131.91.33
3510.131.91.34/3210.131.91.34 – 10.131.91.3410.131.91.34
3610.131.91.35/3210.131.91.35 – 10.131.91.3510.131.91.35
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3910.131.91.38/3210.131.91.38 – 10.131.91.3810.131.91.38
4010.131.91.39/3210.131.91.39 – 10.131.91.3910.131.91.39
4110.131.91.40/3210.131.91.40 – 10.131.91.4010.131.91.40
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4910.131.91.48/3210.131.91.48 – 10.131.91.4810.131.91.48
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5110.131.91.50/3210.131.91.50 – 10.131.91.5010.131.91.50
5210.131.91.51/3210.131.91.51 – 10.131.91.5110.131.91.51
5310.131.91.52/3210.131.91.52 – 10.131.91.5210.131.91.52
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6010.131.91.59/3210.131.91.59 – 10.131.91.5910.131.91.59
6110.131.91.60/3210.131.91.60 – 10.131.91.6010.131.91.60
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6310.131.91.62/3210.131.91.62 – 10.131.91.6210.131.91.62
6410.131.91.63/3210.131.91.63 – 10.131.91.6310.131.91.63
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7910.131.91.78/3210.131.91.78 – 10.131.91.7810.131.91.78
8010.131.91.79/3210.131.91.79 – 10.131.91.7910.131.91.79
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8910.131.91.88/3210.131.91.88 – 10.131.91.8810.131.91.88
9010.131.91.89/3210.131.91.89 – 10.131.91.8910.131.91.89
9110.131.91.90/3210.131.91.90 – 10.131.91.9010.131.91.90
9210.131.91.91/3210.131.91.91 – 10.131.91.9110.131.91.91
9310.131.91.92/3210.131.91.92 – 10.131.91.9210.131.91.92
9410.131.91.93/3210.131.91.93 – 10.131.91.9310.131.91.93
9510.131.91.94/3210.131.91.94 – 10.131.91.9410.131.91.94
9610.131.91.95/3210.131.91.95 – 10.131.91.9510.131.91.95
9710.131.91.96/3210.131.91.96 – 10.131.91.9610.131.91.96
9810.131.91.97/3210.131.91.97 – 10.131.91.9710.131.91.97
9910.131.91.98/3210.131.91.98 – 10.131.91.9810.131.91.98
10010.131.91.99/3210.131.91.99 – 10.131.91.9910.131.91.99
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10810.131.91.107/3210.131.91.107 – 10.131.91.10710.131.91.107
10910.131.91.108/3210.131.91.108 – 10.131.91.10810.131.91.108
11010.131.91.109/3210.131.91.109 – 10.131.91.10910.131.91.109
11110.131.91.110/3210.131.91.110 – 10.131.91.11010.131.91.110
11210.131.91.111/3210.131.91.111 – 10.131.91.11110.131.91.111
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11410.131.91.113/3210.131.91.113 – 10.131.91.11310.131.91.113
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12110.131.91.120/3210.131.91.120 – 10.131.91.12010.131.91.120
12210.131.91.121/3210.131.91.121 – 10.131.91.12110.131.91.121
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13110.131.91.130/3210.131.91.130 – 10.131.91.13010.131.91.130
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14010.131.91.139/3210.131.91.139 – 10.131.91.13910.131.91.139
14110.131.91.140/3210.131.91.140 – 10.131.91.14010.131.91.140
14210.131.91.141/3210.131.91.141 – 10.131.91.14110.131.91.141
14310.131.91.142/3210.131.91.142 – 10.131.91.14210.131.91.142
14410.131.91.143/3210.131.91.143 – 10.131.91.14310.131.91.143
14510.131.91.144/3210.131.91.144 – 10.131.91.14410.131.91.144
14610.131.91.145/3210.131.91.145 – 10.131.91.14510.131.91.145
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14810.131.91.147/3210.131.91.147 – 10.131.91.14710.131.91.147
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15010.131.91.149/3210.131.91.149 – 10.131.91.14910.131.91.149
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15510.131.91.154/3210.131.91.154 – 10.131.91.15410.131.91.154
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15710.131.91.156/3210.131.91.156 – 10.131.91.15610.131.91.156
15810.131.91.157/3210.131.91.157 – 10.131.91.15710.131.91.157
15910.131.91.158/3210.131.91.158 – 10.131.91.15810.131.91.158
16010.131.91.159/3210.131.91.159 – 10.131.91.15910.131.91.159
16110.131.91.160/3210.131.91.160 – 10.131.91.16010.131.91.160
16210.131.91.161/3210.131.91.161 – 10.131.91.16110.131.91.161
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16810.131.91.167/3210.131.91.167 – 10.131.91.16710.131.91.167
16910.131.91.168/3210.131.91.168 – 10.131.91.16810.131.91.168
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22010.131.91.219/3210.131.91.219 – 10.131.91.21910.131.91.219
22110.131.91.220/3210.131.91.220 – 10.131.91.22010.131.91.220
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22910.131.91.228/3210.131.91.228 – 10.131.91.22810.131.91.228
23010.131.91.229/3210.131.91.229 – 10.131.91.22910.131.91.229
23110.131.91.230/3210.131.91.230 – 10.131.91.23010.131.91.230
23210.131.91.231/3210.131.91.231 – 10.131.91.23110.131.91.231
23310.131.91.232/3210.131.91.232 – 10.131.91.23210.131.91.232
23410.131.91.233/3210.131.91.233 – 10.131.91.23310.131.91.233
23510.131.91.234/3210.131.91.234 – 10.131.91.23410.131.91.234
23610.131.91.235/3210.131.91.235 – 10.131.91.23510.131.91.235
23710.131.91.236/3210.131.91.236 – 10.131.91.23610.131.91.236
23810.131.91.237/3210.131.91.237 – 10.131.91.23710.131.91.237
23910.131.91.238/3210.131.91.238 – 10.131.91.23810.131.91.238
24010.131.91.239/3210.131.91.239 – 10.131.91.23910.131.91.239
24110.131.91.240/3210.131.91.240 – 10.131.91.24010.131.91.240
24210.131.91.241/3210.131.91.241 – 10.131.91.24110.131.91.241
24310.131.91.242/3210.131.91.242 – 10.131.91.24210.131.91.242
24410.131.91.243/3210.131.91.243 – 10.131.91.24310.131.91.243
24510.131.91.244/3210.131.91.244 – 10.131.91.24410.131.91.244
24610.131.91.245/3210.131.91.245 – 10.131.91.24510.131.91.245
24710.131.91.246/3210.131.91.246 – 10.131.91.24610.131.91.246
24810.131.91.247/3210.131.91.247 – 10.131.91.24710.131.91.247
24910.131.91.248/3210.131.91.248 – 10.131.91.24810.131.91.248
25010.131.91.249/3210.131.91.249 – 10.131.91.24910.131.91.249
25110.131.91.250/3210.131.91.250 – 10.131.91.25010.131.91.250
25210.131.91.251/3210.131.91.251 – 10.131.91.25110.131.91.251
25310.131.91.252/3210.131.91.252 – 10.131.91.25210.131.91.252
25410.131.91.253/3210.131.91.253 – 10.131.91.25310.131.91.253
25510.131.91.254/3210.131.91.254 – 10.131.91.25410.131.91.254
25610.131.91.255/3210.131.91.255 – 10.131.91.25510.131.91.255
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 →