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)10.0.194.0/24

network10.0.194.0/24

broadcast10.0.194.255

first host10.0.194.1

last host10.0.194.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.0.194.0/24

address00001010.00000000.11000010.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000000.11000010.00000000

broadcast00001010.00000000.11000010.11111111

green = network part, grey = host part

hex0x0a00c200

decimal167821824

reverse dns0.194.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:c200

/24 split into /30 · 64 subnets

close ×

#	network	host range	broadcast
1	10.0.194.0/30	10.0.194.1 – 10.0.194.2	10.0.194.3
2	10.0.194.4/30	10.0.194.5 – 10.0.194.6	10.0.194.7
3	10.0.194.8/30	10.0.194.9 – 10.0.194.10	10.0.194.11
4	10.0.194.12/30	10.0.194.13 – 10.0.194.14	10.0.194.15
5	10.0.194.16/30	10.0.194.17 – 10.0.194.18	10.0.194.19
6	10.0.194.20/30	10.0.194.21 – 10.0.194.22	10.0.194.23
7	10.0.194.24/30	10.0.194.25 – 10.0.194.26	10.0.194.27
8	10.0.194.28/30	10.0.194.29 – 10.0.194.30	10.0.194.31
9	10.0.194.32/30	10.0.194.33 – 10.0.194.34	10.0.194.35
10	10.0.194.36/30	10.0.194.37 – 10.0.194.38	10.0.194.39
11	10.0.194.40/30	10.0.194.41 – 10.0.194.42	10.0.194.43
12	10.0.194.44/30	10.0.194.45 – 10.0.194.46	10.0.194.47
13	10.0.194.48/30	10.0.194.49 – 10.0.194.50	10.0.194.51
14	10.0.194.52/30	10.0.194.53 – 10.0.194.54	10.0.194.55
15	10.0.194.56/30	10.0.194.57 – 10.0.194.58	10.0.194.59
16	10.0.194.60/30	10.0.194.61 – 10.0.194.62	10.0.194.63
17	10.0.194.64/30	10.0.194.65 – 10.0.194.66	10.0.194.67
18	10.0.194.68/30	10.0.194.69 – 10.0.194.70	10.0.194.71
19	10.0.194.72/30	10.0.194.73 – 10.0.194.74	10.0.194.75
20	10.0.194.76/30	10.0.194.77 – 10.0.194.78	10.0.194.79
21	10.0.194.80/30	10.0.194.81 – 10.0.194.82	10.0.194.83
22	10.0.194.84/30	10.0.194.85 – 10.0.194.86	10.0.194.87
23	10.0.194.88/30	10.0.194.89 – 10.0.194.90	10.0.194.91
24	10.0.194.92/30	10.0.194.93 – 10.0.194.94	10.0.194.95
25	10.0.194.96/30	10.0.194.97 – 10.0.194.98	10.0.194.99
26	10.0.194.100/30	10.0.194.101 – 10.0.194.102	10.0.194.103
27	10.0.194.104/30	10.0.194.105 – 10.0.194.106	10.0.194.107
28	10.0.194.108/30	10.0.194.109 – 10.0.194.110	10.0.194.111
29	10.0.194.112/30	10.0.194.113 – 10.0.194.114	10.0.194.115
30	10.0.194.116/30	10.0.194.117 – 10.0.194.118	10.0.194.119
31	10.0.194.120/30	10.0.194.121 – 10.0.194.122	10.0.194.123
32	10.0.194.124/30	10.0.194.125 – 10.0.194.126	10.0.194.127
33	10.0.194.128/30	10.0.194.129 – 10.0.194.130	10.0.194.131
34	10.0.194.132/30	10.0.194.133 – 10.0.194.134	10.0.194.135
35	10.0.194.136/30	10.0.194.137 – 10.0.194.138	10.0.194.139
36	10.0.194.140/30	10.0.194.141 – 10.0.194.142	10.0.194.143
37	10.0.194.144/30	10.0.194.145 – 10.0.194.146	10.0.194.147
38	10.0.194.148/30	10.0.194.149 – 10.0.194.150	10.0.194.151
39	10.0.194.152/30	10.0.194.153 – 10.0.194.154	10.0.194.155
40	10.0.194.156/30	10.0.194.157 – 10.0.194.158	10.0.194.159
41	10.0.194.160/30	10.0.194.161 – 10.0.194.162	10.0.194.163
42	10.0.194.164/30	10.0.194.165 – 10.0.194.166	10.0.194.167
43	10.0.194.168/30	10.0.194.169 – 10.0.194.170	10.0.194.171
44	10.0.194.172/30	10.0.194.173 – 10.0.194.174	10.0.194.175
45	10.0.194.176/30	10.0.194.177 – 10.0.194.178	10.0.194.179
46	10.0.194.180/30	10.0.194.181 – 10.0.194.182	10.0.194.183
47	10.0.194.184/30	10.0.194.185 – 10.0.194.186	10.0.194.187
48	10.0.194.188/30	10.0.194.189 – 10.0.194.190	10.0.194.191
49	10.0.194.192/30	10.0.194.193 – 10.0.194.194	10.0.194.195
50	10.0.194.196/30	10.0.194.197 – 10.0.194.198	10.0.194.199
51	10.0.194.200/30	10.0.194.201 – 10.0.194.202	10.0.194.203
52	10.0.194.204/30	10.0.194.205 – 10.0.194.206	10.0.194.207
53	10.0.194.208/30	10.0.194.209 – 10.0.194.210	10.0.194.211
54	10.0.194.212/30	10.0.194.213 – 10.0.194.214	10.0.194.215
55	10.0.194.216/30	10.0.194.217 – 10.0.194.218	10.0.194.219
56	10.0.194.220/30	10.0.194.221 – 10.0.194.222	10.0.194.223
57	10.0.194.224/30	10.0.194.225 – 10.0.194.226	10.0.194.227
58	10.0.194.228/30	10.0.194.229 – 10.0.194.230	10.0.194.231
59	10.0.194.232/30	10.0.194.233 – 10.0.194.234	10.0.194.235
60	10.0.194.236/30	10.0.194.237 – 10.0.194.238	10.0.194.239
61	10.0.194.240/30	10.0.194.241 – 10.0.194.242	10.0.194.243
62	10.0.194.244/30	10.0.194.245 – 10.0.194.246	10.0.194.247
63	10.0.194.248/30	10.0.194.249 – 10.0.194.250	10.0.194.251
64	10.0.194.252/30	10.0.194.253 – 10.0.194.254	10.0.194.255

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 →