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)10.76.11.0/24

network10.76.11.0/24

broadcast10.76.11.255

first host10.76.11.1

last host10.76.11.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.76.11.0/24

address00001010.01001100.00001011.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.01001100.00001011.00000000

broadcast00001010.01001100.00001011.11111111

green = network part, grey = host part

hex0x0a4c0b00

decimal172755712

reverse dns0.11.76.10.in-addr.arpa

ipv4-mapped::ffff:a4c:b00

/24 split into /30 · 64 subnets

close ×

#	network	host range	broadcast
1	10.76.11.0/30	10.76.11.1 – 10.76.11.2	10.76.11.3
2	10.76.11.4/30	10.76.11.5 – 10.76.11.6	10.76.11.7
3	10.76.11.8/30	10.76.11.9 – 10.76.11.10	10.76.11.11
4	10.76.11.12/30	10.76.11.13 – 10.76.11.14	10.76.11.15
5	10.76.11.16/30	10.76.11.17 – 10.76.11.18	10.76.11.19
6	10.76.11.20/30	10.76.11.21 – 10.76.11.22	10.76.11.23
7	10.76.11.24/30	10.76.11.25 – 10.76.11.26	10.76.11.27
8	10.76.11.28/30	10.76.11.29 – 10.76.11.30	10.76.11.31
9	10.76.11.32/30	10.76.11.33 – 10.76.11.34	10.76.11.35
10	10.76.11.36/30	10.76.11.37 – 10.76.11.38	10.76.11.39
11	10.76.11.40/30	10.76.11.41 – 10.76.11.42	10.76.11.43
12	10.76.11.44/30	10.76.11.45 – 10.76.11.46	10.76.11.47
13	10.76.11.48/30	10.76.11.49 – 10.76.11.50	10.76.11.51
14	10.76.11.52/30	10.76.11.53 – 10.76.11.54	10.76.11.55
15	10.76.11.56/30	10.76.11.57 – 10.76.11.58	10.76.11.59
16	10.76.11.60/30	10.76.11.61 – 10.76.11.62	10.76.11.63
17	10.76.11.64/30	10.76.11.65 – 10.76.11.66	10.76.11.67
18	10.76.11.68/30	10.76.11.69 – 10.76.11.70	10.76.11.71
19	10.76.11.72/30	10.76.11.73 – 10.76.11.74	10.76.11.75
20	10.76.11.76/30	10.76.11.77 – 10.76.11.78	10.76.11.79
21	10.76.11.80/30	10.76.11.81 – 10.76.11.82	10.76.11.83
22	10.76.11.84/30	10.76.11.85 – 10.76.11.86	10.76.11.87
23	10.76.11.88/30	10.76.11.89 – 10.76.11.90	10.76.11.91
24	10.76.11.92/30	10.76.11.93 – 10.76.11.94	10.76.11.95
25	10.76.11.96/30	10.76.11.97 – 10.76.11.98	10.76.11.99
26	10.76.11.100/30	10.76.11.101 – 10.76.11.102	10.76.11.103
27	10.76.11.104/30	10.76.11.105 – 10.76.11.106	10.76.11.107
28	10.76.11.108/30	10.76.11.109 – 10.76.11.110	10.76.11.111
29	10.76.11.112/30	10.76.11.113 – 10.76.11.114	10.76.11.115
30	10.76.11.116/30	10.76.11.117 – 10.76.11.118	10.76.11.119
31	10.76.11.120/30	10.76.11.121 – 10.76.11.122	10.76.11.123
32	10.76.11.124/30	10.76.11.125 – 10.76.11.126	10.76.11.127
33	10.76.11.128/30	10.76.11.129 – 10.76.11.130	10.76.11.131
34	10.76.11.132/30	10.76.11.133 – 10.76.11.134	10.76.11.135
35	10.76.11.136/30	10.76.11.137 – 10.76.11.138	10.76.11.139
36	10.76.11.140/30	10.76.11.141 – 10.76.11.142	10.76.11.143
37	10.76.11.144/30	10.76.11.145 – 10.76.11.146	10.76.11.147
38	10.76.11.148/30	10.76.11.149 – 10.76.11.150	10.76.11.151
39	10.76.11.152/30	10.76.11.153 – 10.76.11.154	10.76.11.155
40	10.76.11.156/30	10.76.11.157 – 10.76.11.158	10.76.11.159
41	10.76.11.160/30	10.76.11.161 – 10.76.11.162	10.76.11.163
42	10.76.11.164/30	10.76.11.165 – 10.76.11.166	10.76.11.167
43	10.76.11.168/30	10.76.11.169 – 10.76.11.170	10.76.11.171
44	10.76.11.172/30	10.76.11.173 – 10.76.11.174	10.76.11.175
45	10.76.11.176/30	10.76.11.177 – 10.76.11.178	10.76.11.179
46	10.76.11.180/30	10.76.11.181 – 10.76.11.182	10.76.11.183
47	10.76.11.184/30	10.76.11.185 – 10.76.11.186	10.76.11.187
48	10.76.11.188/30	10.76.11.189 – 10.76.11.190	10.76.11.191
49	10.76.11.192/30	10.76.11.193 – 10.76.11.194	10.76.11.195
50	10.76.11.196/30	10.76.11.197 – 10.76.11.198	10.76.11.199
51	10.76.11.200/30	10.76.11.201 – 10.76.11.202	10.76.11.203
52	10.76.11.204/30	10.76.11.205 – 10.76.11.206	10.76.11.207
53	10.76.11.208/30	10.76.11.209 – 10.76.11.210	10.76.11.211
54	10.76.11.212/30	10.76.11.213 – 10.76.11.214	10.76.11.215
55	10.76.11.216/30	10.76.11.217 – 10.76.11.218	10.76.11.219
56	10.76.11.220/30	10.76.11.221 – 10.76.11.222	10.76.11.223
57	10.76.11.224/30	10.76.11.225 – 10.76.11.226	10.76.11.227
58	10.76.11.228/30	10.76.11.229 – 10.76.11.230	10.76.11.231
59	10.76.11.232/30	10.76.11.233 – 10.76.11.234	10.76.11.235
60	10.76.11.236/30	10.76.11.237 – 10.76.11.238	10.76.11.239
61	10.76.11.240/30	10.76.11.241 – 10.76.11.242	10.76.11.243
62	10.76.11.244/30	10.76.11.245 – 10.76.11.246	10.76.11.247
63	10.76.11.248/30	10.76.11.249 – 10.76.11.250	10.76.11.251
64	10.76.11.252/30	10.76.11.253 – 10.76.11.254	10.76.11.255

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 →