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)10.82.26.0/24

network10.82.26.0/24

broadcast10.82.26.255

first host10.82.26.1

last host10.82.26.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.82.26.0/24

address00001010.01010010.00011010.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.01010010.00011010.00000000

broadcast00001010.01010010.00011010.11111111

green = network part, grey = host part

hex0x0a521a00

decimal173152768

reverse dns0.26.82.10.in-addr.arpa

ipv4-mapped::ffff:a52:1a00

/24 split into /30 · 64 subnets

close ×

#	network	host range	broadcast
1	10.82.26.0/30	10.82.26.1 – 10.82.26.2	10.82.26.3
2	10.82.26.4/30	10.82.26.5 – 10.82.26.6	10.82.26.7
3	10.82.26.8/30	10.82.26.9 – 10.82.26.10	10.82.26.11
4	10.82.26.12/30	10.82.26.13 – 10.82.26.14	10.82.26.15
5	10.82.26.16/30	10.82.26.17 – 10.82.26.18	10.82.26.19
6	10.82.26.20/30	10.82.26.21 – 10.82.26.22	10.82.26.23
7	10.82.26.24/30	10.82.26.25 – 10.82.26.26	10.82.26.27
8	10.82.26.28/30	10.82.26.29 – 10.82.26.30	10.82.26.31
9	10.82.26.32/30	10.82.26.33 – 10.82.26.34	10.82.26.35
10	10.82.26.36/30	10.82.26.37 – 10.82.26.38	10.82.26.39
11	10.82.26.40/30	10.82.26.41 – 10.82.26.42	10.82.26.43
12	10.82.26.44/30	10.82.26.45 – 10.82.26.46	10.82.26.47
13	10.82.26.48/30	10.82.26.49 – 10.82.26.50	10.82.26.51
14	10.82.26.52/30	10.82.26.53 – 10.82.26.54	10.82.26.55
15	10.82.26.56/30	10.82.26.57 – 10.82.26.58	10.82.26.59
16	10.82.26.60/30	10.82.26.61 – 10.82.26.62	10.82.26.63
17	10.82.26.64/30	10.82.26.65 – 10.82.26.66	10.82.26.67
18	10.82.26.68/30	10.82.26.69 – 10.82.26.70	10.82.26.71
19	10.82.26.72/30	10.82.26.73 – 10.82.26.74	10.82.26.75
20	10.82.26.76/30	10.82.26.77 – 10.82.26.78	10.82.26.79
21	10.82.26.80/30	10.82.26.81 – 10.82.26.82	10.82.26.83
22	10.82.26.84/30	10.82.26.85 – 10.82.26.86	10.82.26.87
23	10.82.26.88/30	10.82.26.89 – 10.82.26.90	10.82.26.91
24	10.82.26.92/30	10.82.26.93 – 10.82.26.94	10.82.26.95
25	10.82.26.96/30	10.82.26.97 – 10.82.26.98	10.82.26.99
26	10.82.26.100/30	10.82.26.101 – 10.82.26.102	10.82.26.103
27	10.82.26.104/30	10.82.26.105 – 10.82.26.106	10.82.26.107
28	10.82.26.108/30	10.82.26.109 – 10.82.26.110	10.82.26.111
29	10.82.26.112/30	10.82.26.113 – 10.82.26.114	10.82.26.115
30	10.82.26.116/30	10.82.26.117 – 10.82.26.118	10.82.26.119
31	10.82.26.120/30	10.82.26.121 – 10.82.26.122	10.82.26.123
32	10.82.26.124/30	10.82.26.125 – 10.82.26.126	10.82.26.127
33	10.82.26.128/30	10.82.26.129 – 10.82.26.130	10.82.26.131
34	10.82.26.132/30	10.82.26.133 – 10.82.26.134	10.82.26.135
35	10.82.26.136/30	10.82.26.137 – 10.82.26.138	10.82.26.139
36	10.82.26.140/30	10.82.26.141 – 10.82.26.142	10.82.26.143
37	10.82.26.144/30	10.82.26.145 – 10.82.26.146	10.82.26.147
38	10.82.26.148/30	10.82.26.149 – 10.82.26.150	10.82.26.151
39	10.82.26.152/30	10.82.26.153 – 10.82.26.154	10.82.26.155
40	10.82.26.156/30	10.82.26.157 – 10.82.26.158	10.82.26.159
41	10.82.26.160/30	10.82.26.161 – 10.82.26.162	10.82.26.163
42	10.82.26.164/30	10.82.26.165 – 10.82.26.166	10.82.26.167
43	10.82.26.168/30	10.82.26.169 – 10.82.26.170	10.82.26.171
44	10.82.26.172/30	10.82.26.173 – 10.82.26.174	10.82.26.175
45	10.82.26.176/30	10.82.26.177 – 10.82.26.178	10.82.26.179
46	10.82.26.180/30	10.82.26.181 – 10.82.26.182	10.82.26.183
47	10.82.26.184/30	10.82.26.185 – 10.82.26.186	10.82.26.187
48	10.82.26.188/30	10.82.26.189 – 10.82.26.190	10.82.26.191
49	10.82.26.192/30	10.82.26.193 – 10.82.26.194	10.82.26.195
50	10.82.26.196/30	10.82.26.197 – 10.82.26.198	10.82.26.199
51	10.82.26.200/30	10.82.26.201 – 10.82.26.202	10.82.26.203
52	10.82.26.204/30	10.82.26.205 – 10.82.26.206	10.82.26.207
53	10.82.26.208/30	10.82.26.209 – 10.82.26.210	10.82.26.211
54	10.82.26.212/30	10.82.26.213 – 10.82.26.214	10.82.26.215
55	10.82.26.216/30	10.82.26.217 – 10.82.26.218	10.82.26.219
56	10.82.26.220/30	10.82.26.221 – 10.82.26.222	10.82.26.223
57	10.82.26.224/30	10.82.26.225 – 10.82.26.226	10.82.26.227
58	10.82.26.228/30	10.82.26.229 – 10.82.26.230	10.82.26.231
59	10.82.26.232/30	10.82.26.233 – 10.82.26.234	10.82.26.235
60	10.82.26.236/30	10.82.26.237 – 10.82.26.238	10.82.26.239
61	10.82.26.240/30	10.82.26.241 – 10.82.26.242	10.82.26.243
62	10.82.26.244/30	10.82.26.245 – 10.82.26.246	10.82.26.247
63	10.82.26.248/30	10.82.26.249 – 10.82.26.250	10.82.26.251
64	10.82.26.252/30	10.82.26.253 – 10.82.26.254	10.82.26.255

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 →