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.

Try:192.168.1.10/24 10.0.0.0/8 172.16.5.4/20 203.0.113.9/29

IPv6 calculator →

private IP (RFC 1918)10.0.117.0/24

network10.0.117.0/24

broadcast10.0.117.255

first host10.0.117.1

last host10.0.117.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.0.117.0/24

address00001010.00000000.01110101.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000000.01110101.00000000

broadcast00001010.00000000.01110101.11111111

green = network part, grey = host part

hex0x0a007500

decimal167802112

reverse dns0.117.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:7500

/24 split into /30 · 64 subnets

close ×

#	network	host range	broadcast
1	10.0.117.0/30	10.0.117.1 – 10.0.117.2	10.0.117.3
2	10.0.117.4/30	10.0.117.5 – 10.0.117.6	10.0.117.7
3	10.0.117.8/30	10.0.117.9 – 10.0.117.10	10.0.117.11
4	10.0.117.12/30	10.0.117.13 – 10.0.117.14	10.0.117.15
5	10.0.117.16/30	10.0.117.17 – 10.0.117.18	10.0.117.19
6	10.0.117.20/30	10.0.117.21 – 10.0.117.22	10.0.117.23
7	10.0.117.24/30	10.0.117.25 – 10.0.117.26	10.0.117.27
8	10.0.117.28/30	10.0.117.29 – 10.0.117.30	10.0.117.31
9	10.0.117.32/30	10.0.117.33 – 10.0.117.34	10.0.117.35
10	10.0.117.36/30	10.0.117.37 – 10.0.117.38	10.0.117.39
11	10.0.117.40/30	10.0.117.41 – 10.0.117.42	10.0.117.43
12	10.0.117.44/30	10.0.117.45 – 10.0.117.46	10.0.117.47
13	10.0.117.48/30	10.0.117.49 – 10.0.117.50	10.0.117.51
14	10.0.117.52/30	10.0.117.53 – 10.0.117.54	10.0.117.55
15	10.0.117.56/30	10.0.117.57 – 10.0.117.58	10.0.117.59
16	10.0.117.60/30	10.0.117.61 – 10.0.117.62	10.0.117.63
17	10.0.117.64/30	10.0.117.65 – 10.0.117.66	10.0.117.67
18	10.0.117.68/30	10.0.117.69 – 10.0.117.70	10.0.117.71
19	10.0.117.72/30	10.0.117.73 – 10.0.117.74	10.0.117.75
20	10.0.117.76/30	10.0.117.77 – 10.0.117.78	10.0.117.79
21	10.0.117.80/30	10.0.117.81 – 10.0.117.82	10.0.117.83
22	10.0.117.84/30	10.0.117.85 – 10.0.117.86	10.0.117.87
23	10.0.117.88/30	10.0.117.89 – 10.0.117.90	10.0.117.91
24	10.0.117.92/30	10.0.117.93 – 10.0.117.94	10.0.117.95
25	10.0.117.96/30	10.0.117.97 – 10.0.117.98	10.0.117.99
26	10.0.117.100/30	10.0.117.101 – 10.0.117.102	10.0.117.103
27	10.0.117.104/30	10.0.117.105 – 10.0.117.106	10.0.117.107
28	10.0.117.108/30	10.0.117.109 – 10.0.117.110	10.0.117.111
29	10.0.117.112/30	10.0.117.113 – 10.0.117.114	10.0.117.115
30	10.0.117.116/30	10.0.117.117 – 10.0.117.118	10.0.117.119
31	10.0.117.120/30	10.0.117.121 – 10.0.117.122	10.0.117.123
32	10.0.117.124/30	10.0.117.125 – 10.0.117.126	10.0.117.127
33	10.0.117.128/30	10.0.117.129 – 10.0.117.130	10.0.117.131
34	10.0.117.132/30	10.0.117.133 – 10.0.117.134	10.0.117.135
35	10.0.117.136/30	10.0.117.137 – 10.0.117.138	10.0.117.139
36	10.0.117.140/30	10.0.117.141 – 10.0.117.142	10.0.117.143
37	10.0.117.144/30	10.0.117.145 – 10.0.117.146	10.0.117.147
38	10.0.117.148/30	10.0.117.149 – 10.0.117.150	10.0.117.151
39	10.0.117.152/30	10.0.117.153 – 10.0.117.154	10.0.117.155
40	10.0.117.156/30	10.0.117.157 – 10.0.117.158	10.0.117.159
41	10.0.117.160/30	10.0.117.161 – 10.0.117.162	10.0.117.163
42	10.0.117.164/30	10.0.117.165 – 10.0.117.166	10.0.117.167
43	10.0.117.168/30	10.0.117.169 – 10.0.117.170	10.0.117.171
44	10.0.117.172/30	10.0.117.173 – 10.0.117.174	10.0.117.175
45	10.0.117.176/30	10.0.117.177 – 10.0.117.178	10.0.117.179
46	10.0.117.180/30	10.0.117.181 – 10.0.117.182	10.0.117.183
47	10.0.117.184/30	10.0.117.185 – 10.0.117.186	10.0.117.187
48	10.0.117.188/30	10.0.117.189 – 10.0.117.190	10.0.117.191
49	10.0.117.192/30	10.0.117.193 – 10.0.117.194	10.0.117.195
50	10.0.117.196/30	10.0.117.197 – 10.0.117.198	10.0.117.199
51	10.0.117.200/30	10.0.117.201 – 10.0.117.202	10.0.117.203
52	10.0.117.204/30	10.0.117.205 – 10.0.117.206	10.0.117.207
53	10.0.117.208/30	10.0.117.209 – 10.0.117.210	10.0.117.211
54	10.0.117.212/30	10.0.117.213 – 10.0.117.214	10.0.117.215
55	10.0.117.216/30	10.0.117.217 – 10.0.117.218	10.0.117.219
56	10.0.117.220/30	10.0.117.221 – 10.0.117.222	10.0.117.223
57	10.0.117.224/30	10.0.117.225 – 10.0.117.226	10.0.117.227
58	10.0.117.228/30	10.0.117.229 – 10.0.117.230	10.0.117.231
59	10.0.117.232/30	10.0.117.233 – 10.0.117.234	10.0.117.235
60	10.0.117.236/30	10.0.117.237 – 10.0.117.238	10.0.117.239
61	10.0.117.240/30	10.0.117.241 – 10.0.117.242	10.0.117.243
62	10.0.117.244/30	10.0.117.245 – 10.0.117.246	10.0.117.247
63	10.0.117.248/30	10.0.117.249 – 10.0.117.250	10.0.117.251
64	10.0.117.252/30	10.0.117.253 – 10.0.117.254	10.0.117.255

01 / table

IPv4 CIDR prefix table.

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

prefix	subnet mask	addresses	hosts	in your /24
/0	0.0.0.0	4,294,967,296	4,294,967,294	-
/1	128.0.0.0	2,147,483,648	2,147,483,646	-
/2	192.0.0.0	1,073,741,824	1,073,741,822	-
/3	224.0.0.0	536,870,912	536,870,910	-
/4	240.0.0.0	268,435,456	268,435,454	-
/5	248.0.0.0	134,217,728	134,217,726	-
/6	252.0.0.0	67,108,864	67,108,862	-
/7	254.0.0.0	33,554,432	33,554,430	-
/8	255.0.0.0	16,777,216	16,777,214	-
/9	255.128.0.0	8,388,608	8,388,606	-
/10	255.192.0.0	4,194,304	4,194,302	-
/11	255.224.0.0	2,097,152	2,097,150	-
/12	255.240.0.0	1,048,576	1,048,574	-
/13	255.248.0.0	524,288	524,286	-
/14	255.252.0.0	262,144	262,142	-
/15	255.254.0.0	131,072	131,070	-
/16	255.255.0.0	65,536	65,534	-
/17	255.255.128.0	32,768	32,766	-
/18	255.255.192.0	16,384	16,382	-
/19	255.255.224.0	8,192	8,190	-
/20	255.255.240.0	4,096	4,094	-
/21	255.255.248.0	2,048	2,046	-
/22	255.255.252.0	1,024	1,022	-
/23	255.255.254.0	512	510	-
/24	255.255.255.0	256	254	1
/25	255.255.255.128	128	126	2 split →
/26	255.255.255.192	64	62	4 split →
/27	255.255.255.224	32	30	8 split →
/28	255.255.255.240	16	14	16 split →
/29	255.255.255.248	8	6	32 split →
/30	255.255.255.252	4	2	64 split →
/31	255.255.255.254	2	2	128 split →
/32	255.255.255.255	1	1	256 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 →