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)10.56.128.0/18
network10.56.128.0/18
broadcast10.56.191.255
first host10.56.128.1
last host10.56.191.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.56.128.0/18
address00001010.00111000.10000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.00111000.10000000.00000000
broadcast00001010.00111000.10111111.11111111
green = network part, grey = host part
hex0x0a388000
decimal171474944
reverse dns0.128.56.10.in-addr.arpa
ipv4-mapped::ffff:a38:8000

/18 split into /32 · 16,384 subnets

close ×
#networkhost rangebroadcast
110.56.128.0/3210.56.128.0 – 10.56.128.010.56.128.0
210.56.128.1/3210.56.128.1 – 10.56.128.110.56.128.1
310.56.128.2/3210.56.128.2 – 10.56.128.210.56.128.2
410.56.128.3/3210.56.128.3 – 10.56.128.310.56.128.3
510.56.128.4/3210.56.128.4 – 10.56.128.410.56.128.4
610.56.128.5/3210.56.128.5 – 10.56.128.510.56.128.5
710.56.128.6/3210.56.128.6 – 10.56.128.610.56.128.6
810.56.128.7/3210.56.128.7 – 10.56.128.710.56.128.7
910.56.128.8/3210.56.128.8 – 10.56.128.810.56.128.8
1010.56.128.9/3210.56.128.9 – 10.56.128.910.56.128.9
1110.56.128.10/3210.56.128.10 – 10.56.128.1010.56.128.10
1210.56.128.11/3210.56.128.11 – 10.56.128.1110.56.128.11
1310.56.128.12/3210.56.128.12 – 10.56.128.1210.56.128.12
1410.56.128.13/3210.56.128.13 – 10.56.128.1310.56.128.13
1510.56.128.14/3210.56.128.14 – 10.56.128.1410.56.128.14
1610.56.128.15/3210.56.128.15 – 10.56.128.1510.56.128.15
1710.56.128.16/3210.56.128.16 – 10.56.128.1610.56.128.16
1810.56.128.17/3210.56.128.17 – 10.56.128.1710.56.128.17
1910.56.128.18/3210.56.128.18 – 10.56.128.1810.56.128.18
2010.56.128.19/3210.56.128.19 – 10.56.128.1910.56.128.19
2110.56.128.20/3210.56.128.20 – 10.56.128.2010.56.128.20
2210.56.128.21/3210.56.128.21 – 10.56.128.2110.56.128.21
2310.56.128.22/3210.56.128.22 – 10.56.128.2210.56.128.22
2410.56.128.23/3210.56.128.23 – 10.56.128.2310.56.128.23
2510.56.128.24/3210.56.128.24 – 10.56.128.2410.56.128.24
2610.56.128.25/3210.56.128.25 – 10.56.128.2510.56.128.25
2710.56.128.26/3210.56.128.26 – 10.56.128.2610.56.128.26
2810.56.128.27/3210.56.128.27 – 10.56.128.2710.56.128.27
2910.56.128.28/3210.56.128.28 – 10.56.128.2810.56.128.28
3010.56.128.29/3210.56.128.29 – 10.56.128.2910.56.128.29
3110.56.128.30/3210.56.128.30 – 10.56.128.3010.56.128.30
3210.56.128.31/3210.56.128.31 – 10.56.128.3110.56.128.31
3310.56.128.32/3210.56.128.32 – 10.56.128.3210.56.128.32
3410.56.128.33/3210.56.128.33 – 10.56.128.3310.56.128.33
3510.56.128.34/3210.56.128.34 – 10.56.128.3410.56.128.34
3610.56.128.35/3210.56.128.35 – 10.56.128.3510.56.128.35
3710.56.128.36/3210.56.128.36 – 10.56.128.3610.56.128.36
3810.56.128.37/3210.56.128.37 – 10.56.128.3710.56.128.37
3910.56.128.38/3210.56.128.38 – 10.56.128.3810.56.128.38
4010.56.128.39/3210.56.128.39 – 10.56.128.3910.56.128.39
4110.56.128.40/3210.56.128.40 – 10.56.128.4010.56.128.40
4210.56.128.41/3210.56.128.41 – 10.56.128.4110.56.128.41
4310.56.128.42/3210.56.128.42 – 10.56.128.4210.56.128.42
4410.56.128.43/3210.56.128.43 – 10.56.128.4310.56.128.43
4510.56.128.44/3210.56.128.44 – 10.56.128.4410.56.128.44
4610.56.128.45/3210.56.128.45 – 10.56.128.4510.56.128.45
4710.56.128.46/3210.56.128.46 – 10.56.128.4610.56.128.46
4810.56.128.47/3210.56.128.47 – 10.56.128.4710.56.128.47
4910.56.128.48/3210.56.128.48 – 10.56.128.4810.56.128.48
5010.56.128.49/3210.56.128.49 – 10.56.128.4910.56.128.49
5110.56.128.50/3210.56.128.50 – 10.56.128.5010.56.128.50
5210.56.128.51/3210.56.128.51 – 10.56.128.5110.56.128.51
5310.56.128.52/3210.56.128.52 – 10.56.128.5210.56.128.52
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5610.56.128.55/3210.56.128.55 – 10.56.128.5510.56.128.55
5710.56.128.56/3210.56.128.56 – 10.56.128.5610.56.128.56
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6010.56.128.59/3210.56.128.59 – 10.56.128.5910.56.128.59
6110.56.128.60/3210.56.128.60 – 10.56.128.6010.56.128.60
6210.56.128.61/3210.56.128.61 – 10.56.128.6110.56.128.61
6310.56.128.62/3210.56.128.62 – 10.56.128.6210.56.128.62
6410.56.128.63/3210.56.128.63 – 10.56.128.6310.56.128.63
6510.56.128.64/3210.56.128.64 – 10.56.128.6410.56.128.64
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6810.56.128.67/3210.56.128.67 – 10.56.128.6710.56.128.67
6910.56.128.68/3210.56.128.68 – 10.56.128.6810.56.128.68
7010.56.128.69/3210.56.128.69 – 10.56.128.6910.56.128.69
7110.56.128.70/3210.56.128.70 – 10.56.128.7010.56.128.70
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7610.56.128.75/3210.56.128.75 – 10.56.128.7510.56.128.75
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7810.56.128.77/3210.56.128.77 – 10.56.128.7710.56.128.77
7910.56.128.78/3210.56.128.78 – 10.56.128.7810.56.128.78
8010.56.128.79/3210.56.128.79 – 10.56.128.7910.56.128.79
8110.56.128.80/3210.56.128.80 – 10.56.128.8010.56.128.80
8210.56.128.81/3210.56.128.81 – 10.56.128.8110.56.128.81
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8410.56.128.83/3210.56.128.83 – 10.56.128.8310.56.128.83
8510.56.128.84/3210.56.128.84 – 10.56.128.8410.56.128.84
8610.56.128.85/3210.56.128.85 – 10.56.128.8510.56.128.85
8710.56.128.86/3210.56.128.86 – 10.56.128.8610.56.128.86
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8910.56.128.88/3210.56.128.88 – 10.56.128.8810.56.128.88
9010.56.128.89/3210.56.128.89 – 10.56.128.8910.56.128.89
9110.56.128.90/3210.56.128.90 – 10.56.128.9010.56.128.90
9210.56.128.91/3210.56.128.91 – 10.56.128.9110.56.128.91
9310.56.128.92/3210.56.128.92 – 10.56.128.9210.56.128.92
9410.56.128.93/3210.56.128.93 – 10.56.128.9310.56.128.93
9510.56.128.94/3210.56.128.94 – 10.56.128.9410.56.128.94
9610.56.128.95/3210.56.128.95 – 10.56.128.9510.56.128.95
9710.56.128.96/3210.56.128.96 – 10.56.128.9610.56.128.96
9810.56.128.97/3210.56.128.97 – 10.56.128.9710.56.128.97
9910.56.128.98/3210.56.128.98 – 10.56.128.9810.56.128.98
10010.56.128.99/3210.56.128.99 – 10.56.128.9910.56.128.99
10110.56.128.100/3210.56.128.100 – 10.56.128.10010.56.128.100
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10810.56.128.107/3210.56.128.107 – 10.56.128.10710.56.128.107
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11210.56.128.111/3210.56.128.111 – 10.56.128.11110.56.128.111
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12010.56.128.119/3210.56.128.119 – 10.56.128.11910.56.128.119
12110.56.128.120/3210.56.128.120 – 10.56.128.12010.56.128.120
12210.56.128.121/3210.56.128.121 – 10.56.128.12110.56.128.121
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12510.56.128.124/3210.56.128.124 – 10.56.128.12410.56.128.124
12610.56.128.125/3210.56.128.125 – 10.56.128.12510.56.128.125
12710.56.128.126/3210.56.128.126 – 10.56.128.12610.56.128.126
12810.56.128.127/3210.56.128.127 – 10.56.128.12710.56.128.127
12910.56.128.128/3210.56.128.128 – 10.56.128.12810.56.128.128
13010.56.128.129/3210.56.128.129 – 10.56.128.12910.56.128.129
13110.56.128.130/3210.56.128.130 – 10.56.128.13010.56.128.130
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13310.56.128.132/3210.56.128.132 – 10.56.128.13210.56.128.132
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13610.56.128.135/3210.56.128.135 – 10.56.128.13510.56.128.135
13710.56.128.136/3210.56.128.136 – 10.56.128.13610.56.128.136
13810.56.128.137/3210.56.128.137 – 10.56.128.13710.56.128.137
13910.56.128.138/3210.56.128.138 – 10.56.128.13810.56.128.138
14010.56.128.139/3210.56.128.139 – 10.56.128.13910.56.128.139
14110.56.128.140/3210.56.128.140 – 10.56.128.14010.56.128.140
14210.56.128.141/3210.56.128.141 – 10.56.128.14110.56.128.141
14310.56.128.142/3210.56.128.142 – 10.56.128.14210.56.128.142
14410.56.128.143/3210.56.128.143 – 10.56.128.14310.56.128.143
14510.56.128.144/3210.56.128.144 – 10.56.128.14410.56.128.144
14610.56.128.145/3210.56.128.145 – 10.56.128.14510.56.128.145
14710.56.128.146/3210.56.128.146 – 10.56.128.14610.56.128.146
14810.56.128.147/3210.56.128.147 – 10.56.128.14710.56.128.147
14910.56.128.148/3210.56.128.148 – 10.56.128.14810.56.128.148
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15510.56.128.154/3210.56.128.154 – 10.56.128.15410.56.128.154
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15710.56.128.156/3210.56.128.156 – 10.56.128.15610.56.128.156
15810.56.128.157/3210.56.128.157 – 10.56.128.15710.56.128.157
15910.56.128.158/3210.56.128.158 – 10.56.128.15810.56.128.158
16010.56.128.159/3210.56.128.159 – 10.56.128.15910.56.128.159
16110.56.128.160/3210.56.128.160 – 10.56.128.16010.56.128.160
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16410.56.128.163/3210.56.128.163 – 10.56.128.16310.56.128.163
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16810.56.128.167/3210.56.128.167 – 10.56.128.16710.56.128.167
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17210.56.128.171/3210.56.128.171 – 10.56.128.17110.56.128.171
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18410.56.128.183/3210.56.128.183 – 10.56.128.18310.56.128.183
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22010.56.128.219/3210.56.128.219 – 10.56.128.21910.56.128.219
22110.56.128.220/3210.56.128.220 – 10.56.128.22010.56.128.220
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22910.56.128.228/3210.56.128.228 – 10.56.128.22810.56.128.228
23010.56.128.229/3210.56.128.229 – 10.56.128.22910.56.128.229
23110.56.128.230/3210.56.128.230 – 10.56.128.23010.56.128.230
23210.56.128.231/3210.56.128.231 – 10.56.128.23110.56.128.231
23310.56.128.232/3210.56.128.232 – 10.56.128.23210.56.128.232
23410.56.128.233/3210.56.128.233 – 10.56.128.23310.56.128.233
23510.56.128.234/3210.56.128.234 – 10.56.128.23410.56.128.234
23610.56.128.235/3210.56.128.235 – 10.56.128.23510.56.128.235
23710.56.128.236/3210.56.128.236 – 10.56.128.23610.56.128.236
23810.56.128.237/3210.56.128.237 – 10.56.128.23710.56.128.237
23910.56.128.238/3210.56.128.238 – 10.56.128.23810.56.128.238
24010.56.128.239/3210.56.128.239 – 10.56.128.23910.56.128.239
24110.56.128.240/3210.56.128.240 – 10.56.128.24010.56.128.240
24210.56.128.241/3210.56.128.241 – 10.56.128.24110.56.128.241
24310.56.128.242/3210.56.128.242 – 10.56.128.24210.56.128.242
24410.56.128.243/3210.56.128.243 – 10.56.128.24310.56.128.243
24510.56.128.244/3210.56.128.244 – 10.56.128.24410.56.128.244
24610.56.128.245/3210.56.128.245 – 10.56.128.24510.56.128.245
24710.56.128.246/3210.56.128.246 – 10.56.128.24610.56.128.246
24810.56.128.247/3210.56.128.247 – 10.56.128.24710.56.128.247
24910.56.128.248/3210.56.128.248 – 10.56.128.24810.56.128.248
25010.56.128.249/3210.56.128.249 – 10.56.128.24910.56.128.249
25110.56.128.250/3210.56.128.250 – 10.56.128.25010.56.128.250
25210.56.128.251/3210.56.128.251 – 10.56.128.25110.56.128.251
25310.56.128.252/3210.56.128.252 – 10.56.128.25210.56.128.252
25410.56.128.253/3210.56.128.253 – 10.56.128.25310.56.128.253
25510.56.128.254/3210.56.128.254 – 10.56.128.25410.56.128.254
25610.56.128.255/3210.56.128.255 – 10.56.128.25510.56.128.255

showing 256 of 16,384

01 / table

IPv4 CIDR prefix table.

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

prefixsubnet maskaddresseshostsin your /18
/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-
/18255.255.192.016,38416,3821
/19255.255.224.08,1928,1902 split →
/20255.255.240.04,0964,0944 split →
/21255.255.248.02,0482,0468 split →
/22255.255.252.01,0241,02216 split →
/23255.255.254.051251032 split →
/24255.255.255.025625464 split →
/25255.255.255.128128126128 split →
/26255.255.255.1926462256 split →
/27255.255.255.2243230512 split →
/28255.255.255.24016141,024 split →
/29255.255.255.248862,048 split →
/30255.255.255.252424,096 split →
/31255.255.255.254228,192 split →
/32255.255.255.2551116,384 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 →