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)10.30.45.0/24
network10.30.45.0/24
broadcast10.30.45.255
first host10.30.45.1
last host10.30.45.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.30.45.0/24
address00001010.00011110.00101101.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.00011110.00101101.00000000
broadcast00001010.00011110.00101101.11111111
green = network part, grey = host part
hex0x0a1e2d00
decimal169749760
reverse dns0.45.30.10.in-addr.arpa
ipv4-mapped::ffff:a1e:2d00

/24 split into /32 · 256 subnets

close ×
#networkhost rangebroadcast
110.30.45.0/3210.30.45.0 – 10.30.45.010.30.45.0
210.30.45.1/3210.30.45.1 – 10.30.45.110.30.45.1
310.30.45.2/3210.30.45.2 – 10.30.45.210.30.45.2
410.30.45.3/3210.30.45.3 – 10.30.45.310.30.45.3
510.30.45.4/3210.30.45.4 – 10.30.45.410.30.45.4
610.30.45.5/3210.30.45.5 – 10.30.45.510.30.45.5
710.30.45.6/3210.30.45.6 – 10.30.45.610.30.45.6
810.30.45.7/3210.30.45.7 – 10.30.45.710.30.45.7
910.30.45.8/3210.30.45.8 – 10.30.45.810.30.45.8
1010.30.45.9/3210.30.45.9 – 10.30.45.910.30.45.9
1110.30.45.10/3210.30.45.10 – 10.30.45.1010.30.45.10
1210.30.45.11/3210.30.45.11 – 10.30.45.1110.30.45.11
1310.30.45.12/3210.30.45.12 – 10.30.45.1210.30.45.12
1410.30.45.13/3210.30.45.13 – 10.30.45.1310.30.45.13
1510.30.45.14/3210.30.45.14 – 10.30.45.1410.30.45.14
1610.30.45.15/3210.30.45.15 – 10.30.45.1510.30.45.15
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1810.30.45.17/3210.30.45.17 – 10.30.45.1710.30.45.17
1910.30.45.18/3210.30.45.18 – 10.30.45.1810.30.45.18
2010.30.45.19/3210.30.45.19 – 10.30.45.1910.30.45.19
2110.30.45.20/3210.30.45.20 – 10.30.45.2010.30.45.20
2210.30.45.21/3210.30.45.21 – 10.30.45.2110.30.45.21
2310.30.45.22/3210.30.45.22 – 10.30.45.2210.30.45.22
2410.30.45.23/3210.30.45.23 – 10.30.45.2310.30.45.23
2510.30.45.24/3210.30.45.24 – 10.30.45.2410.30.45.24
2610.30.45.25/3210.30.45.25 – 10.30.45.2510.30.45.25
2710.30.45.26/3210.30.45.26 – 10.30.45.2610.30.45.26
2810.30.45.27/3210.30.45.27 – 10.30.45.2710.30.45.27
2910.30.45.28/3210.30.45.28 – 10.30.45.2810.30.45.28
3010.30.45.29/3210.30.45.29 – 10.30.45.2910.30.45.29
3110.30.45.30/3210.30.45.30 – 10.30.45.3010.30.45.30
3210.30.45.31/3210.30.45.31 – 10.30.45.3110.30.45.31
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3410.30.45.33/3210.30.45.33 – 10.30.45.3310.30.45.33
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3710.30.45.36/3210.30.45.36 – 10.30.45.3610.30.45.36
3810.30.45.37/3210.30.45.37 – 10.30.45.3710.30.45.37
3910.30.45.38/3210.30.45.38 – 10.30.45.3810.30.45.38
4010.30.45.39/3210.30.45.39 – 10.30.45.3910.30.45.39
4110.30.45.40/3210.30.45.40 – 10.30.45.4010.30.45.40
4210.30.45.41/3210.30.45.41 – 10.30.45.4110.30.45.41
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4410.30.45.43/3210.30.45.43 – 10.30.45.4310.30.45.43
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4610.30.45.45/3210.30.45.45 – 10.30.45.4510.30.45.45
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6110.30.45.60/3210.30.45.60 – 10.30.45.6010.30.45.60
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6910.30.45.68/3210.30.45.68 – 10.30.45.6810.30.45.68
7010.30.45.69/3210.30.45.69 – 10.30.45.6910.30.45.69
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7810.30.45.77/3210.30.45.77 – 10.30.45.7710.30.45.77
7910.30.45.78/3210.30.45.78 – 10.30.45.7810.30.45.78
8010.30.45.79/3210.30.45.79 – 10.30.45.7910.30.45.79
8110.30.45.80/3210.30.45.80 – 10.30.45.8010.30.45.80
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8410.30.45.83/3210.30.45.83 – 10.30.45.8310.30.45.83
8510.30.45.84/3210.30.45.84 – 10.30.45.8410.30.45.84
8610.30.45.85/3210.30.45.85 – 10.30.45.8510.30.45.85
8710.30.45.86/3210.30.45.86 – 10.30.45.8610.30.45.86
8810.30.45.87/3210.30.45.87 – 10.30.45.8710.30.45.87
8910.30.45.88/3210.30.45.88 – 10.30.45.8810.30.45.88
9010.30.45.89/3210.30.45.89 – 10.30.45.8910.30.45.89
9110.30.45.90/3210.30.45.90 – 10.30.45.9010.30.45.90
9210.30.45.91/3210.30.45.91 – 10.30.45.9110.30.45.91
9310.30.45.92/3210.30.45.92 – 10.30.45.9210.30.45.92
9410.30.45.93/3210.30.45.93 – 10.30.45.9310.30.45.93
9510.30.45.94/3210.30.45.94 – 10.30.45.9410.30.45.94
9610.30.45.95/3210.30.45.95 – 10.30.45.9510.30.45.95
9710.30.45.96/3210.30.45.96 – 10.30.45.9610.30.45.96
9810.30.45.97/3210.30.45.97 – 10.30.45.9710.30.45.97
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10010.30.45.99/3210.30.45.99 – 10.30.45.9910.30.45.99
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11110.30.45.110/3210.30.45.110 – 10.30.45.11010.30.45.110
11210.30.45.111/3210.30.45.111 – 10.30.45.11110.30.45.111
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12210.30.45.121/3210.30.45.121 – 10.30.45.12110.30.45.121
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13910.30.45.138/3210.30.45.138 – 10.30.45.13810.30.45.138
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14110.30.45.140/3210.30.45.140 – 10.30.45.14010.30.45.140
14210.30.45.141/3210.30.45.141 – 10.30.45.14110.30.45.141
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14410.30.45.143/3210.30.45.143 – 10.30.45.14310.30.45.143
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14810.30.45.147/3210.30.45.147 – 10.30.45.14710.30.45.147
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15010.30.45.149/3210.30.45.149 – 10.30.45.14910.30.45.149
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16110.30.45.160/3210.30.45.160 – 10.30.45.16010.30.45.160
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22110.30.45.220/3210.30.45.220 – 10.30.45.22010.30.45.220
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22910.30.45.228/3210.30.45.228 – 10.30.45.22810.30.45.228
23010.30.45.229/3210.30.45.229 – 10.30.45.22910.30.45.229
23110.30.45.230/3210.30.45.230 – 10.30.45.23010.30.45.230
23210.30.45.231/3210.30.45.231 – 10.30.45.23110.30.45.231
23310.30.45.232/3210.30.45.232 – 10.30.45.23210.30.45.232
23410.30.45.233/3210.30.45.233 – 10.30.45.23310.30.45.233
23510.30.45.234/3210.30.45.234 – 10.30.45.23410.30.45.234
23610.30.45.235/3210.30.45.235 – 10.30.45.23510.30.45.235
23710.30.45.236/3210.30.45.236 – 10.30.45.23610.30.45.236
23810.30.45.237/3210.30.45.237 – 10.30.45.23710.30.45.237
23910.30.45.238/3210.30.45.238 – 10.30.45.23810.30.45.238
24010.30.45.239/3210.30.45.239 – 10.30.45.23910.30.45.239
24110.30.45.240/3210.30.45.240 – 10.30.45.24010.30.45.240
24210.30.45.241/3210.30.45.241 – 10.30.45.24110.30.45.241
24310.30.45.242/3210.30.45.242 – 10.30.45.24210.30.45.242
24410.30.45.243/3210.30.45.243 – 10.30.45.24310.30.45.243
24510.30.45.244/3210.30.45.244 – 10.30.45.24410.30.45.244
24610.30.45.245/3210.30.45.245 – 10.30.45.24510.30.45.245
24710.30.45.246/3210.30.45.246 – 10.30.45.24610.30.45.246
24810.30.45.247/3210.30.45.247 – 10.30.45.24710.30.45.247
24910.30.45.248/3210.30.45.248 – 10.30.45.24810.30.45.248
25010.30.45.249/3210.30.45.249 – 10.30.45.24910.30.45.249
25110.30.45.250/3210.30.45.250 – 10.30.45.25010.30.45.250
25210.30.45.251/3210.30.45.251 – 10.30.45.25110.30.45.251
25310.30.45.252/3210.30.45.252 – 10.30.45.25210.30.45.252
25410.30.45.253/3210.30.45.253 – 10.30.45.25310.30.45.253
25510.30.45.254/3210.30.45.254 – 10.30.45.25410.30.45.254
25610.30.45.255/3210.30.45.255 – 10.30.45.25510.30.45.255
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 →