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)10.28.7.0/24
network10.28.7.0/24
broadcast10.28.7.255
first host10.28.7.1
last host10.28.7.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.28.7.0/24
address00001010.00011100.00000111.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.00011100.00000111.00000000
broadcast00001010.00011100.00000111.11111111
green = network part, grey = host part
hex0x0a1c0700
decimal169608960
reverse dns0.7.28.10.in-addr.arpa
ipv4-mapped::ffff:a1c:700

/24 split into /32 · 256 subnets

close ×
#networkhost rangebroadcast
110.28.7.0/3210.28.7.0 – 10.28.7.010.28.7.0
210.28.7.1/3210.28.7.1 – 10.28.7.110.28.7.1
310.28.7.2/3210.28.7.2 – 10.28.7.210.28.7.2
410.28.7.3/3210.28.7.3 – 10.28.7.310.28.7.3
510.28.7.4/3210.28.7.4 – 10.28.7.410.28.7.4
610.28.7.5/3210.28.7.5 – 10.28.7.510.28.7.5
710.28.7.6/3210.28.7.6 – 10.28.7.610.28.7.6
810.28.7.7/3210.28.7.7 – 10.28.7.710.28.7.7
910.28.7.8/3210.28.7.8 – 10.28.7.810.28.7.8
1010.28.7.9/3210.28.7.9 – 10.28.7.910.28.7.9
1110.28.7.10/3210.28.7.10 – 10.28.7.1010.28.7.10
1210.28.7.11/3210.28.7.11 – 10.28.7.1110.28.7.11
1310.28.7.12/3210.28.7.12 – 10.28.7.1210.28.7.12
1410.28.7.13/3210.28.7.13 – 10.28.7.1310.28.7.13
1510.28.7.14/3210.28.7.14 – 10.28.7.1410.28.7.14
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1810.28.7.17/3210.28.7.17 – 10.28.7.1710.28.7.17
1910.28.7.18/3210.28.7.18 – 10.28.7.1810.28.7.18
2010.28.7.19/3210.28.7.19 – 10.28.7.1910.28.7.19
2110.28.7.20/3210.28.7.20 – 10.28.7.2010.28.7.20
2210.28.7.21/3210.28.7.21 – 10.28.7.2110.28.7.21
2310.28.7.22/3210.28.7.22 – 10.28.7.2210.28.7.22
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2910.28.7.28/3210.28.7.28 – 10.28.7.2810.28.7.28
3010.28.7.29/3210.28.7.29 – 10.28.7.2910.28.7.29
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7910.28.7.78/3210.28.7.78 – 10.28.7.7810.28.7.78
8010.28.7.79/3210.28.7.79 – 10.28.7.7910.28.7.79
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9110.28.7.90/3210.28.7.90 – 10.28.7.9010.28.7.90
9210.28.7.91/3210.28.7.91 – 10.28.7.9110.28.7.91
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9410.28.7.93/3210.28.7.93 – 10.28.7.9310.28.7.93
9510.28.7.94/3210.28.7.94 – 10.28.7.9410.28.7.94
9610.28.7.95/3210.28.7.95 – 10.28.7.9510.28.7.95
9710.28.7.96/3210.28.7.96 – 10.28.7.9610.28.7.96
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22010.28.7.219/3210.28.7.219 – 10.28.7.21910.28.7.219
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22910.28.7.228/3210.28.7.228 – 10.28.7.22810.28.7.228
23010.28.7.229/3210.28.7.229 – 10.28.7.22910.28.7.229
23110.28.7.230/3210.28.7.230 – 10.28.7.23010.28.7.230
23210.28.7.231/3210.28.7.231 – 10.28.7.23110.28.7.231
23310.28.7.232/3210.28.7.232 – 10.28.7.23210.28.7.232
23410.28.7.233/3210.28.7.233 – 10.28.7.23310.28.7.233
23510.28.7.234/3210.28.7.234 – 10.28.7.23410.28.7.234
23610.28.7.235/3210.28.7.235 – 10.28.7.23510.28.7.235
23710.28.7.236/3210.28.7.236 – 10.28.7.23610.28.7.236
23810.28.7.237/3210.28.7.237 – 10.28.7.23710.28.7.237
23910.28.7.238/3210.28.7.238 – 10.28.7.23810.28.7.238
24010.28.7.239/3210.28.7.239 – 10.28.7.23910.28.7.239
24110.28.7.240/3210.28.7.240 – 10.28.7.24010.28.7.240
24210.28.7.241/3210.28.7.241 – 10.28.7.24110.28.7.241
24310.28.7.242/3210.28.7.242 – 10.28.7.24210.28.7.242
24410.28.7.243/3210.28.7.243 – 10.28.7.24310.28.7.243
24510.28.7.244/3210.28.7.244 – 10.28.7.24410.28.7.244
24610.28.7.245/3210.28.7.245 – 10.28.7.24510.28.7.245
24710.28.7.246/3210.28.7.246 – 10.28.7.24610.28.7.246
24810.28.7.247/3210.28.7.247 – 10.28.7.24710.28.7.247
24910.28.7.248/3210.28.7.248 – 10.28.7.24810.28.7.248
25010.28.7.249/3210.28.7.249 – 10.28.7.24910.28.7.249
25110.28.7.250/3210.28.7.250 – 10.28.7.25010.28.7.250
25210.28.7.251/3210.28.7.251 – 10.28.7.25110.28.7.251
25310.28.7.252/3210.28.7.252 – 10.28.7.25210.28.7.252
25410.28.7.253/3210.28.7.253 – 10.28.7.25310.28.7.253
25510.28.7.254/3210.28.7.254 – 10.28.7.25410.28.7.254
25610.28.7.255/3210.28.7.255 – 10.28.7.25510.28.7.255
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 →