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)10.167.29.0/24

network10.167.29.0/24

broadcast10.167.29.255

first host10.167.29.1

last host10.167.29.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.167.29.0/24

address00001010.10100111.00011101.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.10100111.00011101.00000000

broadcast00001010.10100111.00011101.11111111

green = network part, grey = host part

hex0x0aa71d00

decimal178724096

reverse dns0.29.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:1d00

/24 split into /30 · 64 subnets

close ×

#	network	host range	broadcast
1	10.167.29.0/30	10.167.29.1 – 10.167.29.2	10.167.29.3
2	10.167.29.4/30	10.167.29.5 – 10.167.29.6	10.167.29.7
3	10.167.29.8/30	10.167.29.9 – 10.167.29.10	10.167.29.11
4	10.167.29.12/30	10.167.29.13 – 10.167.29.14	10.167.29.15
5	10.167.29.16/30	10.167.29.17 – 10.167.29.18	10.167.29.19
6	10.167.29.20/30	10.167.29.21 – 10.167.29.22	10.167.29.23
7	10.167.29.24/30	10.167.29.25 – 10.167.29.26	10.167.29.27
8	10.167.29.28/30	10.167.29.29 – 10.167.29.30	10.167.29.31
9	10.167.29.32/30	10.167.29.33 – 10.167.29.34	10.167.29.35
10	10.167.29.36/30	10.167.29.37 – 10.167.29.38	10.167.29.39
11	10.167.29.40/30	10.167.29.41 – 10.167.29.42	10.167.29.43
12	10.167.29.44/30	10.167.29.45 – 10.167.29.46	10.167.29.47
13	10.167.29.48/30	10.167.29.49 – 10.167.29.50	10.167.29.51
14	10.167.29.52/30	10.167.29.53 – 10.167.29.54	10.167.29.55
15	10.167.29.56/30	10.167.29.57 – 10.167.29.58	10.167.29.59
16	10.167.29.60/30	10.167.29.61 – 10.167.29.62	10.167.29.63
17	10.167.29.64/30	10.167.29.65 – 10.167.29.66	10.167.29.67
18	10.167.29.68/30	10.167.29.69 – 10.167.29.70	10.167.29.71
19	10.167.29.72/30	10.167.29.73 – 10.167.29.74	10.167.29.75
20	10.167.29.76/30	10.167.29.77 – 10.167.29.78	10.167.29.79
21	10.167.29.80/30	10.167.29.81 – 10.167.29.82	10.167.29.83
22	10.167.29.84/30	10.167.29.85 – 10.167.29.86	10.167.29.87
23	10.167.29.88/30	10.167.29.89 – 10.167.29.90	10.167.29.91
24	10.167.29.92/30	10.167.29.93 – 10.167.29.94	10.167.29.95
25	10.167.29.96/30	10.167.29.97 – 10.167.29.98	10.167.29.99
26	10.167.29.100/30	10.167.29.101 – 10.167.29.102	10.167.29.103
27	10.167.29.104/30	10.167.29.105 – 10.167.29.106	10.167.29.107
28	10.167.29.108/30	10.167.29.109 – 10.167.29.110	10.167.29.111
29	10.167.29.112/30	10.167.29.113 – 10.167.29.114	10.167.29.115
30	10.167.29.116/30	10.167.29.117 – 10.167.29.118	10.167.29.119
31	10.167.29.120/30	10.167.29.121 – 10.167.29.122	10.167.29.123
32	10.167.29.124/30	10.167.29.125 – 10.167.29.126	10.167.29.127
33	10.167.29.128/30	10.167.29.129 – 10.167.29.130	10.167.29.131
34	10.167.29.132/30	10.167.29.133 – 10.167.29.134	10.167.29.135
35	10.167.29.136/30	10.167.29.137 – 10.167.29.138	10.167.29.139
36	10.167.29.140/30	10.167.29.141 – 10.167.29.142	10.167.29.143
37	10.167.29.144/30	10.167.29.145 – 10.167.29.146	10.167.29.147
38	10.167.29.148/30	10.167.29.149 – 10.167.29.150	10.167.29.151
39	10.167.29.152/30	10.167.29.153 – 10.167.29.154	10.167.29.155
40	10.167.29.156/30	10.167.29.157 – 10.167.29.158	10.167.29.159
41	10.167.29.160/30	10.167.29.161 – 10.167.29.162	10.167.29.163
42	10.167.29.164/30	10.167.29.165 – 10.167.29.166	10.167.29.167
43	10.167.29.168/30	10.167.29.169 – 10.167.29.170	10.167.29.171
44	10.167.29.172/30	10.167.29.173 – 10.167.29.174	10.167.29.175
45	10.167.29.176/30	10.167.29.177 – 10.167.29.178	10.167.29.179
46	10.167.29.180/30	10.167.29.181 – 10.167.29.182	10.167.29.183
47	10.167.29.184/30	10.167.29.185 – 10.167.29.186	10.167.29.187
48	10.167.29.188/30	10.167.29.189 – 10.167.29.190	10.167.29.191
49	10.167.29.192/30	10.167.29.193 – 10.167.29.194	10.167.29.195
50	10.167.29.196/30	10.167.29.197 – 10.167.29.198	10.167.29.199
51	10.167.29.200/30	10.167.29.201 – 10.167.29.202	10.167.29.203
52	10.167.29.204/30	10.167.29.205 – 10.167.29.206	10.167.29.207
53	10.167.29.208/30	10.167.29.209 – 10.167.29.210	10.167.29.211
54	10.167.29.212/30	10.167.29.213 – 10.167.29.214	10.167.29.215
55	10.167.29.216/30	10.167.29.217 – 10.167.29.218	10.167.29.219
56	10.167.29.220/30	10.167.29.221 – 10.167.29.222	10.167.29.223
57	10.167.29.224/30	10.167.29.225 – 10.167.29.226	10.167.29.227
58	10.167.29.228/30	10.167.29.229 – 10.167.29.230	10.167.29.231
59	10.167.29.232/30	10.167.29.233 – 10.167.29.234	10.167.29.235
60	10.167.29.236/30	10.167.29.237 – 10.167.29.238	10.167.29.239
61	10.167.29.240/30	10.167.29.241 – 10.167.29.242	10.167.29.243
62	10.167.29.244/30	10.167.29.245 – 10.167.29.246	10.167.29.247
63	10.167.29.248/30	10.167.29.249 – 10.167.29.250	10.167.29.251
64	10.167.29.252/30	10.167.29.253 – 10.167.29.254	10.167.29.255

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 →