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)10.78.110.0/24

network10.78.110.0/24

broadcast10.78.110.255

first host10.78.110.1

last host10.78.110.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.78.110.0/24

address00001010.01001110.01101110.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.01001110.01101110.00000000

broadcast00001010.01001110.01101110.11111111

green = network part, grey = host part

hex0x0a4e6e00

decimal172912128

reverse dns0.110.78.10.in-addr.arpa

ipv4-mapped::ffff:a4e:6e00

/24 split into /30 · 64 subnets

close ×

#	network	host range	broadcast
1	10.78.110.0/30	10.78.110.1 – 10.78.110.2	10.78.110.3
2	10.78.110.4/30	10.78.110.5 – 10.78.110.6	10.78.110.7
3	10.78.110.8/30	10.78.110.9 – 10.78.110.10	10.78.110.11
4	10.78.110.12/30	10.78.110.13 – 10.78.110.14	10.78.110.15
5	10.78.110.16/30	10.78.110.17 – 10.78.110.18	10.78.110.19
6	10.78.110.20/30	10.78.110.21 – 10.78.110.22	10.78.110.23
7	10.78.110.24/30	10.78.110.25 – 10.78.110.26	10.78.110.27
8	10.78.110.28/30	10.78.110.29 – 10.78.110.30	10.78.110.31
9	10.78.110.32/30	10.78.110.33 – 10.78.110.34	10.78.110.35
10	10.78.110.36/30	10.78.110.37 – 10.78.110.38	10.78.110.39
11	10.78.110.40/30	10.78.110.41 – 10.78.110.42	10.78.110.43
12	10.78.110.44/30	10.78.110.45 – 10.78.110.46	10.78.110.47
13	10.78.110.48/30	10.78.110.49 – 10.78.110.50	10.78.110.51
14	10.78.110.52/30	10.78.110.53 – 10.78.110.54	10.78.110.55
15	10.78.110.56/30	10.78.110.57 – 10.78.110.58	10.78.110.59
16	10.78.110.60/30	10.78.110.61 – 10.78.110.62	10.78.110.63
17	10.78.110.64/30	10.78.110.65 – 10.78.110.66	10.78.110.67
18	10.78.110.68/30	10.78.110.69 – 10.78.110.70	10.78.110.71
19	10.78.110.72/30	10.78.110.73 – 10.78.110.74	10.78.110.75
20	10.78.110.76/30	10.78.110.77 – 10.78.110.78	10.78.110.79
21	10.78.110.80/30	10.78.110.81 – 10.78.110.82	10.78.110.83
22	10.78.110.84/30	10.78.110.85 – 10.78.110.86	10.78.110.87
23	10.78.110.88/30	10.78.110.89 – 10.78.110.90	10.78.110.91
24	10.78.110.92/30	10.78.110.93 – 10.78.110.94	10.78.110.95
25	10.78.110.96/30	10.78.110.97 – 10.78.110.98	10.78.110.99
26	10.78.110.100/30	10.78.110.101 – 10.78.110.102	10.78.110.103
27	10.78.110.104/30	10.78.110.105 – 10.78.110.106	10.78.110.107
28	10.78.110.108/30	10.78.110.109 – 10.78.110.110	10.78.110.111
29	10.78.110.112/30	10.78.110.113 – 10.78.110.114	10.78.110.115
30	10.78.110.116/30	10.78.110.117 – 10.78.110.118	10.78.110.119
31	10.78.110.120/30	10.78.110.121 – 10.78.110.122	10.78.110.123
32	10.78.110.124/30	10.78.110.125 – 10.78.110.126	10.78.110.127
33	10.78.110.128/30	10.78.110.129 – 10.78.110.130	10.78.110.131
34	10.78.110.132/30	10.78.110.133 – 10.78.110.134	10.78.110.135
35	10.78.110.136/30	10.78.110.137 – 10.78.110.138	10.78.110.139
36	10.78.110.140/30	10.78.110.141 – 10.78.110.142	10.78.110.143
37	10.78.110.144/30	10.78.110.145 – 10.78.110.146	10.78.110.147
38	10.78.110.148/30	10.78.110.149 – 10.78.110.150	10.78.110.151
39	10.78.110.152/30	10.78.110.153 – 10.78.110.154	10.78.110.155
40	10.78.110.156/30	10.78.110.157 – 10.78.110.158	10.78.110.159
41	10.78.110.160/30	10.78.110.161 – 10.78.110.162	10.78.110.163
42	10.78.110.164/30	10.78.110.165 – 10.78.110.166	10.78.110.167
43	10.78.110.168/30	10.78.110.169 – 10.78.110.170	10.78.110.171
44	10.78.110.172/30	10.78.110.173 – 10.78.110.174	10.78.110.175
45	10.78.110.176/30	10.78.110.177 – 10.78.110.178	10.78.110.179
46	10.78.110.180/30	10.78.110.181 – 10.78.110.182	10.78.110.183
47	10.78.110.184/30	10.78.110.185 – 10.78.110.186	10.78.110.187
48	10.78.110.188/30	10.78.110.189 – 10.78.110.190	10.78.110.191
49	10.78.110.192/30	10.78.110.193 – 10.78.110.194	10.78.110.195
50	10.78.110.196/30	10.78.110.197 – 10.78.110.198	10.78.110.199
51	10.78.110.200/30	10.78.110.201 – 10.78.110.202	10.78.110.203
52	10.78.110.204/30	10.78.110.205 – 10.78.110.206	10.78.110.207
53	10.78.110.208/30	10.78.110.209 – 10.78.110.210	10.78.110.211
54	10.78.110.212/30	10.78.110.213 – 10.78.110.214	10.78.110.215
55	10.78.110.216/30	10.78.110.217 – 10.78.110.218	10.78.110.219
56	10.78.110.220/30	10.78.110.221 – 10.78.110.222	10.78.110.223
57	10.78.110.224/30	10.78.110.225 – 10.78.110.226	10.78.110.227
58	10.78.110.228/30	10.78.110.229 – 10.78.110.230	10.78.110.231
59	10.78.110.232/30	10.78.110.233 – 10.78.110.234	10.78.110.235
60	10.78.110.236/30	10.78.110.237 – 10.78.110.238	10.78.110.239
61	10.78.110.240/30	10.78.110.241 – 10.78.110.242	10.78.110.243
62	10.78.110.244/30	10.78.110.245 – 10.78.110.246	10.78.110.247
63	10.78.110.248/30	10.78.110.249 – 10.78.110.250	10.78.110.251
64	10.78.110.252/30	10.78.110.253 – 10.78.110.254	10.78.110.255

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 →