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)10.7.145.0/24
network10.7.145.0/24
broadcast10.7.145.255
first host10.7.145.1
last host10.7.145.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.7.145.0/24
address00001010.00000111.10010001.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.00000111.10010001.00000000
broadcast00001010.00000111.10010001.11111111
green = network part, grey = host part
hex0x0a079100
decimal168268032
reverse dns0.145.7.10.in-addr.arpa
ipv4-mapped::ffff:a07:9100

/24 split into /32 · 256 subnets

close ×
#networkhost rangebroadcast
110.7.145.0/3210.7.145.0 – 10.7.145.010.7.145.0
210.7.145.1/3210.7.145.1 – 10.7.145.110.7.145.1
310.7.145.2/3210.7.145.2 – 10.7.145.210.7.145.2
410.7.145.3/3210.7.145.3 – 10.7.145.310.7.145.3
510.7.145.4/3210.7.145.4 – 10.7.145.410.7.145.4
610.7.145.5/3210.7.145.5 – 10.7.145.510.7.145.5
710.7.145.6/3210.7.145.6 – 10.7.145.610.7.145.6
810.7.145.7/3210.7.145.7 – 10.7.145.710.7.145.7
910.7.145.8/3210.7.145.8 – 10.7.145.810.7.145.8
1010.7.145.9/3210.7.145.9 – 10.7.145.910.7.145.9
1110.7.145.10/3210.7.145.10 – 10.7.145.1010.7.145.10
1210.7.145.11/3210.7.145.11 – 10.7.145.1110.7.145.11
1310.7.145.12/3210.7.145.12 – 10.7.145.1210.7.145.12
1410.7.145.13/3210.7.145.13 – 10.7.145.1310.7.145.13
1510.7.145.14/3210.7.145.14 – 10.7.145.1410.7.145.14
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1810.7.145.17/3210.7.145.17 – 10.7.145.1710.7.145.17
1910.7.145.18/3210.7.145.18 – 10.7.145.1810.7.145.18
2010.7.145.19/3210.7.145.19 – 10.7.145.1910.7.145.19
2110.7.145.20/3210.7.145.20 – 10.7.145.2010.7.145.20
2210.7.145.21/3210.7.145.21 – 10.7.145.2110.7.145.21
2310.7.145.22/3210.7.145.22 – 10.7.145.2210.7.145.22
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2710.7.145.26/3210.7.145.26 – 10.7.145.2610.7.145.26
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3010.7.145.29/3210.7.145.29 – 10.7.145.2910.7.145.29
3110.7.145.30/3210.7.145.30 – 10.7.145.3010.7.145.30
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3510.7.145.34/3210.7.145.34 – 10.7.145.3410.7.145.34
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4010.7.145.39/3210.7.145.39 – 10.7.145.3910.7.145.39
4110.7.145.40/3210.7.145.40 – 10.7.145.4010.7.145.40
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9110.7.145.90/3210.7.145.90 – 10.7.145.9010.7.145.90
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9410.7.145.93/3210.7.145.93 – 10.7.145.9310.7.145.93
9510.7.145.94/3210.7.145.94 – 10.7.145.9410.7.145.94
9610.7.145.95/3210.7.145.95 – 10.7.145.9510.7.145.95
9710.7.145.96/3210.7.145.96 – 10.7.145.9610.7.145.96
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11210.7.145.111/3210.7.145.111 – 10.7.145.11110.7.145.111
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14110.7.145.140/3210.7.145.140 – 10.7.145.14010.7.145.140
14210.7.145.141/3210.7.145.141 – 10.7.145.14110.7.145.141
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14410.7.145.143/3210.7.145.143 – 10.7.145.14310.7.145.143
14510.7.145.144/3210.7.145.144 – 10.7.145.14410.7.145.144
14610.7.145.145/3210.7.145.145 – 10.7.145.14510.7.145.145
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16110.7.145.160/3210.7.145.160 – 10.7.145.16010.7.145.160
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22010.7.145.219/3210.7.145.219 – 10.7.145.21910.7.145.219
22110.7.145.220/3210.7.145.220 – 10.7.145.22010.7.145.220
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22910.7.145.228/3210.7.145.228 – 10.7.145.22810.7.145.228
23010.7.145.229/3210.7.145.229 – 10.7.145.22910.7.145.229
23110.7.145.230/3210.7.145.230 – 10.7.145.23010.7.145.230
23210.7.145.231/3210.7.145.231 – 10.7.145.23110.7.145.231
23310.7.145.232/3210.7.145.232 – 10.7.145.23210.7.145.232
23410.7.145.233/3210.7.145.233 – 10.7.145.23310.7.145.233
23510.7.145.234/3210.7.145.234 – 10.7.145.23410.7.145.234
23610.7.145.235/3210.7.145.235 – 10.7.145.23510.7.145.235
23710.7.145.236/3210.7.145.236 – 10.7.145.23610.7.145.236
23810.7.145.237/3210.7.145.237 – 10.7.145.23710.7.145.237
23910.7.145.238/3210.7.145.238 – 10.7.145.23810.7.145.238
24010.7.145.239/3210.7.145.239 – 10.7.145.23910.7.145.239
24110.7.145.240/3210.7.145.240 – 10.7.145.24010.7.145.240
24210.7.145.241/3210.7.145.241 – 10.7.145.24110.7.145.241
24310.7.145.242/3210.7.145.242 – 10.7.145.24210.7.145.242
24410.7.145.243/3210.7.145.243 – 10.7.145.24310.7.145.243
24510.7.145.244/3210.7.145.244 – 10.7.145.24410.7.145.244
24610.7.145.245/3210.7.145.245 – 10.7.145.24510.7.145.245
24710.7.145.246/3210.7.145.246 – 10.7.145.24610.7.145.246
24810.7.145.247/3210.7.145.247 – 10.7.145.24710.7.145.247
24910.7.145.248/3210.7.145.248 – 10.7.145.24810.7.145.248
25010.7.145.249/3210.7.145.249 – 10.7.145.24910.7.145.249
25110.7.145.250/3210.7.145.250 – 10.7.145.25010.7.145.250
25210.7.145.251/3210.7.145.251 – 10.7.145.25110.7.145.251
25310.7.145.252/3210.7.145.252 – 10.7.145.25210.7.145.252
25410.7.145.253/3210.7.145.253 – 10.7.145.25310.7.145.253
25510.7.145.254/3210.7.145.254 – 10.7.145.25410.7.145.254
25610.7.145.255/3210.7.145.255 – 10.7.145.25510.7.145.255
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 →