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)10.2.184.0/24

network10.2.184.0/24

broadcast10.2.184.255

first host10.2.184.1

last host10.2.184.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.2.184.0/24

address00001010.00000010.10111000.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000010.10111000.00000000

broadcast00001010.00000010.10111000.11111111

green = network part, grey = host part

hex0x0a02b800

decimal167950336

reverse dns0.184.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:b800

/24 split into /30 · 64 subnets

close ×

#	network	host range	broadcast
1	10.2.184.0/30	10.2.184.1 – 10.2.184.2	10.2.184.3
2	10.2.184.4/30	10.2.184.5 – 10.2.184.6	10.2.184.7
3	10.2.184.8/30	10.2.184.9 – 10.2.184.10	10.2.184.11
4	10.2.184.12/30	10.2.184.13 – 10.2.184.14	10.2.184.15
5	10.2.184.16/30	10.2.184.17 – 10.2.184.18	10.2.184.19
6	10.2.184.20/30	10.2.184.21 – 10.2.184.22	10.2.184.23
7	10.2.184.24/30	10.2.184.25 – 10.2.184.26	10.2.184.27
8	10.2.184.28/30	10.2.184.29 – 10.2.184.30	10.2.184.31
9	10.2.184.32/30	10.2.184.33 – 10.2.184.34	10.2.184.35
10	10.2.184.36/30	10.2.184.37 – 10.2.184.38	10.2.184.39
11	10.2.184.40/30	10.2.184.41 – 10.2.184.42	10.2.184.43
12	10.2.184.44/30	10.2.184.45 – 10.2.184.46	10.2.184.47
13	10.2.184.48/30	10.2.184.49 – 10.2.184.50	10.2.184.51
14	10.2.184.52/30	10.2.184.53 – 10.2.184.54	10.2.184.55
15	10.2.184.56/30	10.2.184.57 – 10.2.184.58	10.2.184.59
16	10.2.184.60/30	10.2.184.61 – 10.2.184.62	10.2.184.63
17	10.2.184.64/30	10.2.184.65 – 10.2.184.66	10.2.184.67
18	10.2.184.68/30	10.2.184.69 – 10.2.184.70	10.2.184.71
19	10.2.184.72/30	10.2.184.73 – 10.2.184.74	10.2.184.75
20	10.2.184.76/30	10.2.184.77 – 10.2.184.78	10.2.184.79
21	10.2.184.80/30	10.2.184.81 – 10.2.184.82	10.2.184.83
22	10.2.184.84/30	10.2.184.85 – 10.2.184.86	10.2.184.87
23	10.2.184.88/30	10.2.184.89 – 10.2.184.90	10.2.184.91
24	10.2.184.92/30	10.2.184.93 – 10.2.184.94	10.2.184.95
25	10.2.184.96/30	10.2.184.97 – 10.2.184.98	10.2.184.99
26	10.2.184.100/30	10.2.184.101 – 10.2.184.102	10.2.184.103
27	10.2.184.104/30	10.2.184.105 – 10.2.184.106	10.2.184.107
28	10.2.184.108/30	10.2.184.109 – 10.2.184.110	10.2.184.111
29	10.2.184.112/30	10.2.184.113 – 10.2.184.114	10.2.184.115
30	10.2.184.116/30	10.2.184.117 – 10.2.184.118	10.2.184.119
31	10.2.184.120/30	10.2.184.121 – 10.2.184.122	10.2.184.123
32	10.2.184.124/30	10.2.184.125 – 10.2.184.126	10.2.184.127
33	10.2.184.128/30	10.2.184.129 – 10.2.184.130	10.2.184.131
34	10.2.184.132/30	10.2.184.133 – 10.2.184.134	10.2.184.135
35	10.2.184.136/30	10.2.184.137 – 10.2.184.138	10.2.184.139
36	10.2.184.140/30	10.2.184.141 – 10.2.184.142	10.2.184.143
37	10.2.184.144/30	10.2.184.145 – 10.2.184.146	10.2.184.147
38	10.2.184.148/30	10.2.184.149 – 10.2.184.150	10.2.184.151
39	10.2.184.152/30	10.2.184.153 – 10.2.184.154	10.2.184.155
40	10.2.184.156/30	10.2.184.157 – 10.2.184.158	10.2.184.159
41	10.2.184.160/30	10.2.184.161 – 10.2.184.162	10.2.184.163
42	10.2.184.164/30	10.2.184.165 – 10.2.184.166	10.2.184.167
43	10.2.184.168/30	10.2.184.169 – 10.2.184.170	10.2.184.171
44	10.2.184.172/30	10.2.184.173 – 10.2.184.174	10.2.184.175
45	10.2.184.176/30	10.2.184.177 – 10.2.184.178	10.2.184.179
46	10.2.184.180/30	10.2.184.181 – 10.2.184.182	10.2.184.183
47	10.2.184.184/30	10.2.184.185 – 10.2.184.186	10.2.184.187
48	10.2.184.188/30	10.2.184.189 – 10.2.184.190	10.2.184.191
49	10.2.184.192/30	10.2.184.193 – 10.2.184.194	10.2.184.195
50	10.2.184.196/30	10.2.184.197 – 10.2.184.198	10.2.184.199
51	10.2.184.200/30	10.2.184.201 – 10.2.184.202	10.2.184.203
52	10.2.184.204/30	10.2.184.205 – 10.2.184.206	10.2.184.207
53	10.2.184.208/30	10.2.184.209 – 10.2.184.210	10.2.184.211
54	10.2.184.212/30	10.2.184.213 – 10.2.184.214	10.2.184.215
55	10.2.184.216/30	10.2.184.217 – 10.2.184.218	10.2.184.219
56	10.2.184.220/30	10.2.184.221 – 10.2.184.222	10.2.184.223
57	10.2.184.224/30	10.2.184.225 – 10.2.184.226	10.2.184.227
58	10.2.184.228/30	10.2.184.229 – 10.2.184.230	10.2.184.231
59	10.2.184.232/30	10.2.184.233 – 10.2.184.234	10.2.184.235
60	10.2.184.236/30	10.2.184.237 – 10.2.184.238	10.2.184.239
61	10.2.184.240/30	10.2.184.241 – 10.2.184.242	10.2.184.243
62	10.2.184.244/30	10.2.184.245 – 10.2.184.246	10.2.184.247
63	10.2.184.248/30	10.2.184.249 – 10.2.184.250	10.2.184.251
64	10.2.184.252/30	10.2.184.253 – 10.2.184.254	10.2.184.255

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 →