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)10.28.69.0/24
network10.28.69.0/24
broadcast10.28.69.255
first host10.28.69.1
last host10.28.69.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.28.69.0/24
address00001010.00011100.01000101.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.00011100.01000101.00000000
broadcast00001010.00011100.01000101.11111111
green = network part, grey = host part
hex0x0a1c4500
decimal169624832
reverse dns0.69.28.10.in-addr.arpa
ipv4-mapped::ffff:a1c:4500

/24 split into /32 · 256 subnets

close ×
#networkhost rangebroadcast
110.28.69.0/3210.28.69.0 – 10.28.69.010.28.69.0
210.28.69.1/3210.28.69.1 – 10.28.69.110.28.69.1
310.28.69.2/3210.28.69.2 – 10.28.69.210.28.69.2
410.28.69.3/3210.28.69.3 – 10.28.69.310.28.69.3
510.28.69.4/3210.28.69.4 – 10.28.69.410.28.69.4
610.28.69.5/3210.28.69.5 – 10.28.69.510.28.69.5
710.28.69.6/3210.28.69.6 – 10.28.69.610.28.69.6
810.28.69.7/3210.28.69.7 – 10.28.69.710.28.69.7
910.28.69.8/3210.28.69.8 – 10.28.69.810.28.69.8
1010.28.69.9/3210.28.69.9 – 10.28.69.910.28.69.9
1110.28.69.10/3210.28.69.10 – 10.28.69.1010.28.69.10
1210.28.69.11/3210.28.69.11 – 10.28.69.1110.28.69.11
1310.28.69.12/3210.28.69.12 – 10.28.69.1210.28.69.12
1410.28.69.13/3210.28.69.13 – 10.28.69.1310.28.69.13
1510.28.69.14/3210.28.69.14 – 10.28.69.1410.28.69.14
1610.28.69.15/3210.28.69.15 – 10.28.69.1510.28.69.15
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1810.28.69.17/3210.28.69.17 – 10.28.69.1710.28.69.17
1910.28.69.18/3210.28.69.18 – 10.28.69.1810.28.69.18
2010.28.69.19/3210.28.69.19 – 10.28.69.1910.28.69.19
2110.28.69.20/3210.28.69.20 – 10.28.69.2010.28.69.20
2210.28.69.21/3210.28.69.21 – 10.28.69.2110.28.69.21
2310.28.69.22/3210.28.69.22 – 10.28.69.2210.28.69.22
2410.28.69.23/3210.28.69.23 – 10.28.69.2310.28.69.23
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2710.28.69.26/3210.28.69.26 – 10.28.69.2610.28.69.26
2810.28.69.27/3210.28.69.27 – 10.28.69.2710.28.69.27
2910.28.69.28/3210.28.69.28 – 10.28.69.2810.28.69.28
3010.28.69.29/3210.28.69.29 – 10.28.69.2910.28.69.29
3110.28.69.30/3210.28.69.30 – 10.28.69.3010.28.69.30
3210.28.69.31/3210.28.69.31 – 10.28.69.3110.28.69.31
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11110.28.69.110/3210.28.69.110 – 10.28.69.11010.28.69.110
11210.28.69.111/3210.28.69.111 – 10.28.69.11110.28.69.111
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14110.28.69.140/3210.28.69.140 – 10.28.69.14010.28.69.140
14210.28.69.141/3210.28.69.141 – 10.28.69.14110.28.69.141
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22910.28.69.228/3210.28.69.228 – 10.28.69.22810.28.69.228
23010.28.69.229/3210.28.69.229 – 10.28.69.22910.28.69.229
23110.28.69.230/3210.28.69.230 – 10.28.69.23010.28.69.230
23210.28.69.231/3210.28.69.231 – 10.28.69.23110.28.69.231
23310.28.69.232/3210.28.69.232 – 10.28.69.23210.28.69.232
23410.28.69.233/3210.28.69.233 – 10.28.69.23310.28.69.233
23510.28.69.234/3210.28.69.234 – 10.28.69.23410.28.69.234
23610.28.69.235/3210.28.69.235 – 10.28.69.23510.28.69.235
23710.28.69.236/3210.28.69.236 – 10.28.69.23610.28.69.236
23810.28.69.237/3210.28.69.237 – 10.28.69.23710.28.69.237
23910.28.69.238/3210.28.69.238 – 10.28.69.23810.28.69.238
24010.28.69.239/3210.28.69.239 – 10.28.69.23910.28.69.239
24110.28.69.240/3210.28.69.240 – 10.28.69.24010.28.69.240
24210.28.69.241/3210.28.69.241 – 10.28.69.24110.28.69.241
24310.28.69.242/3210.28.69.242 – 10.28.69.24210.28.69.242
24410.28.69.243/3210.28.69.243 – 10.28.69.24310.28.69.243
24510.28.69.244/3210.28.69.244 – 10.28.69.24410.28.69.244
24610.28.69.245/3210.28.69.245 – 10.28.69.24510.28.69.245
24710.28.69.246/3210.28.69.246 – 10.28.69.24610.28.69.246
24810.28.69.247/3210.28.69.247 – 10.28.69.24710.28.69.247
24910.28.69.248/3210.28.69.248 – 10.28.69.24810.28.69.248
25010.28.69.249/3210.28.69.249 – 10.28.69.24910.28.69.249
25110.28.69.250/3210.28.69.250 – 10.28.69.25010.28.69.250
25210.28.69.251/3210.28.69.251 – 10.28.69.25110.28.69.251
25310.28.69.252/3210.28.69.252 – 10.28.69.25210.28.69.252
25410.28.69.253/3210.28.69.253 – 10.28.69.25310.28.69.253
25510.28.69.254/3210.28.69.254 – 10.28.69.25410.28.69.254
25610.28.69.255/3210.28.69.255 – 10.28.69.25510.28.69.255
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 →