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)10.78.14.0/24

network10.78.14.0/24

broadcast10.78.14.255

first host10.78.14.1

last host10.78.14.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.78.14.0/24

address00001010.01001110.00001110.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.01001110.00001110.00000000

broadcast00001010.01001110.00001110.11111111

green = network part, grey = host part

hex0x0a4e0e00

decimal172887552

reverse dns0.14.78.10.in-addr.arpa

ipv4-mapped::ffff:a4e:e00

/24 split into /30 · 64 subnets

close ×

#	network	host range	broadcast
1	10.78.14.0/30	10.78.14.1 – 10.78.14.2	10.78.14.3
2	10.78.14.4/30	10.78.14.5 – 10.78.14.6	10.78.14.7
3	10.78.14.8/30	10.78.14.9 – 10.78.14.10	10.78.14.11
4	10.78.14.12/30	10.78.14.13 – 10.78.14.14	10.78.14.15
5	10.78.14.16/30	10.78.14.17 – 10.78.14.18	10.78.14.19
6	10.78.14.20/30	10.78.14.21 – 10.78.14.22	10.78.14.23
7	10.78.14.24/30	10.78.14.25 – 10.78.14.26	10.78.14.27
8	10.78.14.28/30	10.78.14.29 – 10.78.14.30	10.78.14.31
9	10.78.14.32/30	10.78.14.33 – 10.78.14.34	10.78.14.35
10	10.78.14.36/30	10.78.14.37 – 10.78.14.38	10.78.14.39
11	10.78.14.40/30	10.78.14.41 – 10.78.14.42	10.78.14.43
12	10.78.14.44/30	10.78.14.45 – 10.78.14.46	10.78.14.47
13	10.78.14.48/30	10.78.14.49 – 10.78.14.50	10.78.14.51
14	10.78.14.52/30	10.78.14.53 – 10.78.14.54	10.78.14.55
15	10.78.14.56/30	10.78.14.57 – 10.78.14.58	10.78.14.59
16	10.78.14.60/30	10.78.14.61 – 10.78.14.62	10.78.14.63
17	10.78.14.64/30	10.78.14.65 – 10.78.14.66	10.78.14.67
18	10.78.14.68/30	10.78.14.69 – 10.78.14.70	10.78.14.71
19	10.78.14.72/30	10.78.14.73 – 10.78.14.74	10.78.14.75
20	10.78.14.76/30	10.78.14.77 – 10.78.14.78	10.78.14.79
21	10.78.14.80/30	10.78.14.81 – 10.78.14.82	10.78.14.83
22	10.78.14.84/30	10.78.14.85 – 10.78.14.86	10.78.14.87
23	10.78.14.88/30	10.78.14.89 – 10.78.14.90	10.78.14.91
24	10.78.14.92/30	10.78.14.93 – 10.78.14.94	10.78.14.95
25	10.78.14.96/30	10.78.14.97 – 10.78.14.98	10.78.14.99
26	10.78.14.100/30	10.78.14.101 – 10.78.14.102	10.78.14.103
27	10.78.14.104/30	10.78.14.105 – 10.78.14.106	10.78.14.107
28	10.78.14.108/30	10.78.14.109 – 10.78.14.110	10.78.14.111
29	10.78.14.112/30	10.78.14.113 – 10.78.14.114	10.78.14.115
30	10.78.14.116/30	10.78.14.117 – 10.78.14.118	10.78.14.119
31	10.78.14.120/30	10.78.14.121 – 10.78.14.122	10.78.14.123
32	10.78.14.124/30	10.78.14.125 – 10.78.14.126	10.78.14.127
33	10.78.14.128/30	10.78.14.129 – 10.78.14.130	10.78.14.131
34	10.78.14.132/30	10.78.14.133 – 10.78.14.134	10.78.14.135
35	10.78.14.136/30	10.78.14.137 – 10.78.14.138	10.78.14.139
36	10.78.14.140/30	10.78.14.141 – 10.78.14.142	10.78.14.143
37	10.78.14.144/30	10.78.14.145 – 10.78.14.146	10.78.14.147
38	10.78.14.148/30	10.78.14.149 – 10.78.14.150	10.78.14.151
39	10.78.14.152/30	10.78.14.153 – 10.78.14.154	10.78.14.155
40	10.78.14.156/30	10.78.14.157 – 10.78.14.158	10.78.14.159
41	10.78.14.160/30	10.78.14.161 – 10.78.14.162	10.78.14.163
42	10.78.14.164/30	10.78.14.165 – 10.78.14.166	10.78.14.167
43	10.78.14.168/30	10.78.14.169 – 10.78.14.170	10.78.14.171
44	10.78.14.172/30	10.78.14.173 – 10.78.14.174	10.78.14.175
45	10.78.14.176/30	10.78.14.177 – 10.78.14.178	10.78.14.179
46	10.78.14.180/30	10.78.14.181 – 10.78.14.182	10.78.14.183
47	10.78.14.184/30	10.78.14.185 – 10.78.14.186	10.78.14.187
48	10.78.14.188/30	10.78.14.189 – 10.78.14.190	10.78.14.191
49	10.78.14.192/30	10.78.14.193 – 10.78.14.194	10.78.14.195
50	10.78.14.196/30	10.78.14.197 – 10.78.14.198	10.78.14.199
51	10.78.14.200/30	10.78.14.201 – 10.78.14.202	10.78.14.203
52	10.78.14.204/30	10.78.14.205 – 10.78.14.206	10.78.14.207
53	10.78.14.208/30	10.78.14.209 – 10.78.14.210	10.78.14.211
54	10.78.14.212/30	10.78.14.213 – 10.78.14.214	10.78.14.215
55	10.78.14.216/30	10.78.14.217 – 10.78.14.218	10.78.14.219
56	10.78.14.220/30	10.78.14.221 – 10.78.14.222	10.78.14.223
57	10.78.14.224/30	10.78.14.225 – 10.78.14.226	10.78.14.227
58	10.78.14.228/30	10.78.14.229 – 10.78.14.230	10.78.14.231
59	10.78.14.232/30	10.78.14.233 – 10.78.14.234	10.78.14.235
60	10.78.14.236/30	10.78.14.237 – 10.78.14.238	10.78.14.239
61	10.78.14.240/30	10.78.14.241 – 10.78.14.242	10.78.14.243
62	10.78.14.244/30	10.78.14.245 – 10.78.14.246	10.78.14.247
63	10.78.14.248/30	10.78.14.249 – 10.78.14.250	10.78.14.251
64	10.78.14.252/30	10.78.14.253 – 10.78.14.254	10.78.14.255

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 →